/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/array7_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:12:48,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:12:48,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:12:48,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:12:48,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:12:48,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:12:48,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:12:48,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:12:48,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:12:48,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:12:48,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:12:48,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:12:48,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:12:48,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:12:48,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:12:48,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:12:48,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:12:48,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:12:48,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:12:48,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:12:48,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:12:48,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:12:48,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:12:48,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:12:48,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:12:48,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:12:48,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:12:48,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:12:48,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:12:48,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:12:48,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:12:48,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:12:48,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:12:48,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:12:48,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:12:48,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:12:48,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:12:48,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:12:48,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:12:48,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:12:48,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:12:48,601 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 15:12:48,628 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:12:48,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:12:48,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:12:48,629 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:12:48,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:12:48,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:12:48,629 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:12:48,630 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:12:48,630 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:12:48,630 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:12:48,630 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:12:48,631 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:12:48,631 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:12:48,631 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:12:48,631 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:12:48,631 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:12:48,631 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:12:48,631 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:12:48,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:12:48,632 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:12:48,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:12:48,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:12:48,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:12:48,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:12:48,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:12:48,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:12:48,632 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:12:48,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:12:48,633 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:12:48,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:12:48,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:12:48,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:12:48,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:12:48,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:12:48,633 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:12:48,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:12:48,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:12:48,634 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:12:48,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:12:48,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:12:48,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:12:48,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:12:48,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:12:48,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:12:48,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:12:48,847 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:12:48,847 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:12:48,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array7_pattern.c [2023-04-02 15:12:49,805 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:12:50,006 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:12:50,007 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array7_pattern.c [2023-04-02 15:12:50,011 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dab0c074/ebe1c15139af4eac86b4caebd79b7361/FLAG327cc0ab7 [2023-04-02 15:12:50,025 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dab0c074/ebe1c15139af4eac86b4caebd79b7361 [2023-04-02 15:12:50,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:12:50,031 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:12:50,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:12:50,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:12:50,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:12:50,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:12:50" (1/1) ... [2023-04-02 15:12:50,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37baa283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:12:50, skipping insertion in model container [2023-04-02 15:12:50,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:12:50" (1/1) ... [2023-04-02 15:12:50,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:12:50,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:12:50,146 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/array7_pattern.c[1375,1388] [2023-04-02 15:12:50,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:12:50,174 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:12:50,181 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/array7_pattern.c[1375,1388] [2023-04-02 15:12:50,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:12:50,197 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:12:50,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:12:50 WrapperNode [2023-04-02 15:12:50,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:12:50,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:12:50,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:12:50,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:12:50,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:12:50" (1/1) ... [2023-04-02 15:12:50,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:12:50" (1/1) ... [2023-04-02 15:12:50,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:12:50" (1/1) ... [2023-04-02 15:12:50,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:12:50" (1/1) ... [2023-04-02 15:12:50,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:12:50" (1/1) ... [2023-04-02 15:12:50,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:12:50" (1/1) ... [2023-04-02 15:12:50,220 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:12:50" (1/1) ... [2023-04-02 15:12:50,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:12:50" (1/1) ... [2023-04-02 15:12:50,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:12:50,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:12:50,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:12:50,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:12:50,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:12:50" (1/1) ... [2023-04-02 15:12:50,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:12:50,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:12:50,266 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 15:12:50,288 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 15:12:50,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:12:50,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:12:50,296 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:12:50,297 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 15:12:50,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:12:50,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:12:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:12:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:12:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:12:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:12:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 15:12:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:12:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 15:12:50,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-02 15:12:50,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:12:50,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 15:12:50,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:12:50,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:12:50,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:12:50,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:12:50,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:12:50,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:12:50,368 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:12:50,370 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:12:50,544 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:12:50,562 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:12:50,563 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 15:12:50,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:12:50 BoogieIcfgContainer [2023-04-02 15:12:50,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:12:50,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:12:50,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:12:50,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:12:50,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:12:50" (1/3) ... [2023-04-02 15:12:50,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d86877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:12:50, skipping insertion in model container [2023-04-02 15:12:50,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:12:50" (2/3) ... [2023-04-02 15:12:50,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d86877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:12:50, skipping insertion in model container [2023-04-02 15:12:50,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:12:50" (3/3) ... [2023-04-02 15:12:50,569 INFO L112 eAbstractionObserver]: Analyzing ICFG array7_pattern.c [2023-04-02 15:12:50,600 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:12:50,600 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:12:50,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:12:50,642 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;@71b36986, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:12:50,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:12:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:12:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 15:12:50,649 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:12:50,650 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 15:12:50,650 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:12:50,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:12:50,653 INFO L85 PathProgramCache]: Analyzing trace with hash -619700838, now seen corresponding path program 1 times [2023-04-02 15:12:50,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:12:50,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208456064] [2023-04-02 15:12:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:12:50,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:12:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:12:50,807 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 15:12:50,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:12:50,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208456064] [2023-04-02 15:12:50,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208456064] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:12:50,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:12:50,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 15:12:50,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120200093] [2023-04-02 15:12:50,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:12:50,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 15:12:50,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:12:50,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 15:12:50,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 15:12:50,833 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 15:12:50,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:12:50,873 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-04-02 15:12:50,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 15:12:50,875 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 15:12:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:12:50,879 INFO L225 Difference]: With dead ends: 41 [2023-04-02 15:12:50,880 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 15:12:50,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 15:12:50,884 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:12:50,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:12:50,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 15:12:50,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 15:12:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:12:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-02 15:12:50,915 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2023-04-02 15:12:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:12:50,917 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-02 15:12:50,917 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 15:12:50,919 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-02 15:12:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 15:12:50,920 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:12:50,921 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] [2023-04-02 15:12:50,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 15:12:50,921 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:12:50,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:12:50,922 INFO L85 PathProgramCache]: Analyzing trace with hash -343050430, now seen corresponding path program 1 times [2023-04-02 15:12:50,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:12:50,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711956029] [2023-04-02 15:12:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:12:50,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:12:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:12:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 15:12:51,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:12:51,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711956029] [2023-04-02 15:12:51,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711956029] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:12:51,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:12:51,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:12:51,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740976606] [2023-04-02 15:12:51,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:12:51,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:12:51,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:12:51,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:12:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:12:51,200 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:12:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:12:51,246 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-04-02 15:12:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 15:12:51,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-04-02 15:12:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:12:51,248 INFO L225 Difference]: With dead ends: 28 [2023-04-02 15:12:51,248 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 15:12:51,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 15:12:51,254 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:12:51,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 64 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:12:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 15:12:51,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-02 15:12:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:12:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-04-02 15:12:51,263 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 25 [2023-04-02 15:12:51,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:12:51,264 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-04-02 15:12:51,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:12:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-04-02 15:12:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 15:12:51,265 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:12:51,265 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] [2023-04-02 15:12:51,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 15:12:51,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:12:51,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:12:51,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2118006844, now seen corresponding path program 1 times [2023-04-02 15:12:51,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:12:51,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877952506] [2023-04-02 15:12:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:12:51,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:12:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:12:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 15:12:51,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:12:51,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877952506] [2023-04-02 15:12:51,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877952506] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:12:51,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:12:51,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:12:51,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266178943] [2023-04-02 15:12:51,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:12:51,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:12:51,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:12:51,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:12:51,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:12:51,396 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:12:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:12:51,441 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-04-02 15:12:51,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 15:12:51,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2023-04-02 15:12:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:12:51,443 INFO L225 Difference]: With dead ends: 39 [2023-04-02 15:12:51,443 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 15:12:51,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 15:12:51,444 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:12:51,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:12:51,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 15:12:51,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-02 15:12:51,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:12:51,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-04-02 15:12:51,449 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 26 [2023-04-02 15:12:51,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:12:51,449 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-04-02 15:12:51,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:12:51,450 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-04-02 15:12:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 15:12:51,450 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:12:51,450 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] [2023-04-02 15:12:51,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 15:12:51,451 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:12:51,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:12:51,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1334765166, now seen corresponding path program 1 times [2023-04-02 15:12:51,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:12:51,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072628229] [2023-04-02 15:12:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:12:51,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:12:51,484 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:12:51,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590477401] [2023-04-02 15:12:51,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:12:51,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:12:51,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:12:51,495 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 15:12:51,496 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 15:12:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:12:51,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 15:12:51,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:12:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 15:12:51,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:12:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:12:51,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:12:51,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072628229] [2023-04-02 15:12:51,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:12:51,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590477401] [2023-04-02 15:12:51,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590477401] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:12:51,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1451843091] [2023-04-02 15:12:51,942 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:12:51,942 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:12:51,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:12:51,948 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:12:51,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:12:52,028 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:12:53,379 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-02 15:12:53,387 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2023-04-02 15:12:53,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:12:53,395 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:13:01,404 WARN L223 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 213 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:13:11,925 WARN L223 SmtUtils]: Spent 6.88s on a formula simplification. DAG size of input: 210 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:13:13,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '490#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0) (= |#NULL.base| 0))' at error location [2023-04-02 15:13:13,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:13:13,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:13:13,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2023-04-02 15:13:13,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330266853] [2023-04-02 15:13:13,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:13:13,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 15:13:13,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:13:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 15:13:13,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=854, Unknown=1, NotChecked=0, Total=992 [2023-04-02 15:13:13,110 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 12 states, 7 states have (on average 3.142857142857143) internal successors, (22), 10 states have internal predecessors, (22), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 15:13:13,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:13:13,757 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2023-04-02 15:13:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 15:13:13,757 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 3.142857142857143) internal successors, (22), 10 states have internal predecessors, (22), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2023-04-02 15:13:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:13:13,758 INFO L225 Difference]: With dead ends: 63 [2023-04-02 15:13:13,758 INFO L226 Difference]: Without dead ends: 38 [2023-04-02 15:13:13,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=171, Invalid=1160, Unknown=1, NotChecked=0, Total=1332 [2023-04-02 15:13:13,759 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:13:13,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 88 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 15:13:13,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-02 15:13:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2023-04-02 15:13:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:13:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-04-02 15:13:13,773 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 27 [2023-04-02 15:13:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:13:13,773 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-04-02 15:13:13,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 3.142857142857143) internal successors, (22), 10 states have internal predecessors, (22), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 15:13:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-04-02 15:13:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 15:13:13,774 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:13:13,774 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 15:13:13,781 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 15:13:13,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:13:13,984 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:13:13,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:13:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1748101166, now seen corresponding path program 2 times [2023-04-02 15:13:13,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:13:13,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364237418] [2023-04-02 15:13:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:13:13,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:13:14,013 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:13:14,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535549587] [2023-04-02 15:13:14,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:13:14,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:13:14,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:13:14,023 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 15:13:14,025 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 15:13:14,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 15:13:14,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:13:14,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 15:13:14,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:13:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 15:13:14,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:13:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 15:13:14,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:13:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364237418] [2023-04-02 15:13:14,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:13:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535549587] [2023-04-02 15:13:14,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535549587] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:13:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1014072665] [2023-04-02 15:13:14,671 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:13:14,671 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:13:14,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:13:14,671 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:13:14,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:13:14,713 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:13:15,617 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-02 15:13:15,630 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2023-04-02 15:13:15,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:13:15,640 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:13:25,407 WARN L223 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 213 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:13:39,101 WARN L223 SmtUtils]: Spent 7.16s on a formula simplification. DAG size of input: 210 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:13:40,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '847#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0) (= |#NULL.base| 0))' at error location [2023-04-02 15:13:40,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:13:40,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:13:40,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2023-04-02 15:13:40,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270391281] [2023-04-02 15:13:40,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:13:40,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 15:13:40,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:13:40,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 15:13:40,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=788, Unknown=3, NotChecked=0, Total=930 [2023-04-02 15:13:40,720 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 11 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 15:13:41,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:13:41,557 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-04-02 15:13:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 15:13:41,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2023-04-02 15:13:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:13:41,559 INFO L225 Difference]: With dead ends: 38 [2023-04-02 15:13:41,559 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 15:13:41,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=183, Invalid=1074, Unknown=3, NotChecked=0, Total=1260 [2023-04-02 15:13:41,560 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 15:13:41,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 76 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 15:13:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 15:13:41,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-02 15:13:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:13:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-04-02 15:13:41,565 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 29 [2023-04-02 15:13:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:13:41,566 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-04-02 15:13:41,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 15:13:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-04-02 15:13:41,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 15:13:41,566 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:13:41,567 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 15:13:41,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 15:13:41,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:13:41,772 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:13:41,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:13:41,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1353860114, now seen corresponding path program 3 times [2023-04-02 15:13:41,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:13:41,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328340532] [2023-04-02 15:13:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:13:41,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:13:41,795 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:13:41,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433044522] [2023-04-02 15:13:41,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:13:41,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:13:41,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:13:41,799 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 15:13:41,800 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 15:13:41,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:13:41,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:13:41,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 92 conjunts are in the unsatisfiable core [2023-04-02 15:13:41,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:13:42,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-02 15:13:42,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:42,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-04-02 15:13:42,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-04-02 15:13:42,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 15:13:42,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 15:13:42,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2023-04-02 15:13:42,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2023-04-02 15:13:45,404 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 15:13:45,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 991 treesize of output 914 [2023-04-02 15:13:45,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:45,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:45,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:45,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:45,521 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:13:45,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:45,537 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:13:45,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:45,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:45,562 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:13:45,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:45,572 INFO L217 Elim1Store]: Index analysis took 102 ms [2023-04-02 15:13:45,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 520 treesize of output 424 [2023-04-02 15:13:46,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:46,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:46,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:46,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:46,525 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:13:46,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:46,539 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:13:46,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:46,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:46,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 264 [2023-04-02 15:13:48,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:48,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:48,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:48,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:48,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:48,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:48,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 234 treesize of output 153 [2023-04-02 15:13:51,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:51,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:51,597 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:13:51,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:13:51,606 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:13:51,609 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 15:13:51,778 INFO L321 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2023-04-02 15:13:51,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 136 treesize of output 54 [2023-04-02 15:13:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:13:52,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:13:56,326 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~ARR_SIZE~0 2) (let ((.cse70 (mod (+ c_main_~index~0 c_main_~pivot~0) 4294967296)) (.cse69 (mod c_main_~index~0 4294967296))) (let ((.cse0 (mod (+ (* 4294967295 c_main_~pivot~0) c_main_~index~0) 4294967296)) (.cse68 (* 4 .cse69)) (.cse19 (select |c_#memory_int| |c_main_~#array1~0.base|)) (.cse67 (* 4 .cse70))) (let ((.cse11 (+ |c_main_~#array2~0.offset| .cse67)) (.cse25 (select .cse19 (+ |c_main_~#array1~0.offset| .cse67))) (.cse27 (< 2147483647 .cse70)) (.cse28 (<= .cse70 2147483647)) (.cse20 (+ (- 17179869184) .cse68 |c_main_~#array1~0.offset|)) (.cse15 (+ (- 17179869184) |c_main_~#array2~0.offset| .cse68)) (.cse23 (<= .cse69 2147483647)) (.cse1 (< 2147483647 .cse69)) (.cse5 (+ |c_main_~#array2~0.offset| 8)) (.cse6 (+ |c_main_~#array1~0.offset| 4)) (.cse7 (+ |c_main_~#array2~0.offset| 4)) (.cse3 (+ 8 |c_main_~#array1~0.offset|)) (.cse9 (+ |c_main_~#array2~0.offset| .cse68)) (.cse33 (+ (- 17179869184) |c_main_~#array2~0.offset| .cse67)) (.cse24 (+ .cse68 |c_main_~#array1~0.offset|)) (.cse41 (select .cse19 (+ (- 17179869184) |c_main_~#array1~0.offset| .cse67))) (.cse42 (* 4 .cse0))) (and (or (< 2147483647 .cse0) (let ((.cse12 (+ .cse42 |c_main_~#array2~0.offset|)) (.cse26 (select .cse19 (+ .cse42 |c_main_~#array1~0.offset|)))) (and (or (let ((.cse21 (+ .cse25 .cse26))) (let ((.cse8 (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse19 .cse24 .cse21)))) (and (or .cse1 (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_212 (Array Int Int))) (= 0 (let ((.cse4 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_218) |c_main_~#array2~0.base|) .cse9 (let ((.cse10 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_212) |c_main_~#array2~0.base|))) (+ (select .cse10 .cse11) (select .cse10 .cse12)))))) (let ((.cse2 (select (store .cse8 |c_main_~#array2~0.base| .cse4) |c_main_~#array1~0.base|))) (+ (select .cse2 .cse3) (select .cse4 |c_main_~#array2~0.offset|) (select .cse2 |c_main_~#array1~0.offset|) (select .cse4 .cse5) (select .cse2 .cse6) (select .cse4 .cse7) c_main_~sum~0)))))) (or (and (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_212 (Array Int Int))) (= (let ((.cse13 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_218) |c_main_~#array2~0.base|) .cse15 (let ((.cse16 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_212) |c_main_~#array2~0.base|))) (+ (select .cse16 .cse11) (select .cse16 .cse12)))))) (let ((.cse14 (select (store .cse8 |c_main_~#array2~0.base| .cse13) |c_main_~#array1~0.base|))) (+ (select .cse13 |c_main_~#array2~0.offset|) (select .cse13 .cse5) (select .cse14 |c_main_~#array1~0.offset|) (select .cse14 .cse6) (select .cse14 .cse3) (select .cse13 .cse7) c_main_~sum~0))) 0)) (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_212 (Array Int Int))) (= (let ((.cse18 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_218) |c_main_~#array2~0.base|) .cse15 (let ((.cse22 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_212) |c_main_~#array2~0.base|))) (+ (select .cse22 .cse11) (select .cse22 .cse12)))))) (let ((.cse17 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse19 .cse20 .cse21)) |c_main_~#array2~0.base| .cse18) |c_main_~#array1~0.base|))) (+ (select .cse17 .cse6) (select .cse18 |c_main_~#array2~0.offset|) (select .cse18 .cse5) (select .cse18 .cse7) (select .cse17 |c_main_~#array1~0.offset|) (select .cse17 .cse3) c_main_~sum~0))) 0))) .cse23)))) .cse27) (or .cse28 (let ((.cse36 (+ .cse41 .cse26))) (let ((.cse31 (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse19 .cse24 .cse36)))) (and (or (and (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_212 (Array Int Int))) (= (let ((.cse30 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_218) |c_main_~#array2~0.base|) .cse15 (let ((.cse32 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_212) |c_main_~#array2~0.base|))) (+ (select .cse32 .cse33) (select .cse32 .cse12)))))) (let ((.cse29 (select (store .cse31 |c_main_~#array2~0.base| .cse30) |c_main_~#array1~0.base|))) (+ (select .cse29 .cse3) (select .cse30 .cse5) (select .cse29 .cse6) (select .cse30 |c_main_~#array2~0.offset|) (select .cse30 .cse7) (select .cse29 |c_main_~#array1~0.offset|) c_main_~sum~0))) 0)) (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_212 (Array Int Int))) (= (let ((.cse34 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_218) |c_main_~#array2~0.base|) .cse15 (let ((.cse37 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_212) |c_main_~#array2~0.base|))) (+ (select .cse37 .cse33) (select .cse37 .cse12)))))) (let ((.cse35 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse19 .cse20 .cse36)) |c_main_~#array2~0.base| .cse34) |c_main_~#array1~0.base|))) (+ (select .cse34 .cse5) (select .cse34 |c_main_~#array2~0.offset|) (select .cse35 |c_main_~#array1~0.offset|) (select .cse34 .cse7) (select .cse35 .cse3) (select .cse35 .cse6) c_main_~sum~0))) 0))) .cse23) (or (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_212 (Array Int Int))) (= (let ((.cse38 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_218) |c_main_~#array2~0.base|) .cse9 (let ((.cse40 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_212) |c_main_~#array2~0.base|))) (+ (select .cse40 .cse33) (select .cse40 .cse12)))))) (let ((.cse39 (select (store .cse31 |c_main_~#array2~0.base| .cse38) |c_main_~#array1~0.base|))) (+ (select .cse38 |c_main_~#array2~0.offset|) (select .cse39 .cse3) (select .cse39 .cse6) (select .cse38 .cse5) (select .cse38 .cse7) (select .cse39 |c_main_~#array1~0.offset|) c_main_~sum~0))) 0)) .cse1)))))))) (or (<= .cse0 2147483647) (let ((.cse47 (+ (- 17179869184) .cse42 |c_main_~#array2~0.offset|)) (.cse55 (select .cse19 (+ (- 17179869184) .cse42 |c_main_~#array1~0.offset|)))) (and (or (let ((.cse50 (+ .cse25 .cse55))) (let ((.cse45 (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse19 .cse24 .cse50)))) (and (or (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_212 (Array Int Int))) (= (let ((.cse44 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_218) |c_main_~#array2~0.base|) .cse9 (let ((.cse46 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_212) |c_main_~#array2~0.base|))) (+ (select .cse46 .cse11) (select .cse46 .cse47)))))) (let ((.cse43 (select (store .cse45 |c_main_~#array2~0.base| .cse44) |c_main_~#array1~0.base|))) (+ (select .cse43 .cse3) (select .cse43 .cse6) (select .cse44 .cse5) (select .cse43 |c_main_~#array1~0.offset|) (select .cse44 .cse7) (select .cse44 |c_main_~#array2~0.offset|) c_main_~sum~0))) 0)) .cse1) (or (and (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_212 (Array Int Int))) (= (let ((.cse48 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_218) |c_main_~#array2~0.base|) .cse15 (let ((.cse51 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_212) |c_main_~#array2~0.base|))) (+ (select .cse51 .cse11) (select .cse51 .cse47)))))) (let ((.cse49 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse19 .cse20 .cse50)) |c_main_~#array2~0.base| .cse48) |c_main_~#array1~0.base|))) (+ (select .cse48 .cse5) (select .cse49 |c_main_~#array1~0.offset|) (select .cse48 |c_main_~#array2~0.offset|) (select .cse49 .cse3) (select .cse49 .cse6) (select .cse48 .cse7) c_main_~sum~0))) 0)) (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_212 (Array Int Int))) (= (let ((.cse53 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_218) |c_main_~#array2~0.base|) .cse15 (let ((.cse54 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_212) |c_main_~#array2~0.base|))) (+ (select .cse54 .cse11) (select .cse54 .cse47)))))) (let ((.cse52 (select (store .cse45 |c_main_~#array2~0.base| .cse53) |c_main_~#array1~0.base|))) (+ (select .cse52 |c_main_~#array1~0.offset|) (select .cse53 .cse5) (select .cse53 |c_main_~#array2~0.offset|) (select .cse52 .cse3) (select .cse53 .cse7) (select .cse52 .cse6) c_main_~sum~0))) 0))) .cse23)))) .cse27) (or .cse28 (let ((.cse58 (+ .cse41 .cse55))) (let ((.cse62 (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse19 .cse24 .cse58)))) (and (or (and (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_212 (Array Int Int))) (= (let ((.cse57 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_218) |c_main_~#array2~0.base|) .cse15 (let ((.cse59 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_212) |c_main_~#array2~0.base|))) (+ (select .cse59 .cse47) (select .cse59 .cse33)))))) (let ((.cse56 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse19 .cse20 .cse58)) |c_main_~#array2~0.base| .cse57) |c_main_~#array1~0.base|))) (+ (select .cse56 .cse6) (select .cse56 |c_main_~#array1~0.offset|) (select .cse57 |c_main_~#array2~0.offset|) (select .cse57 .cse7) (select .cse57 .cse5) (select .cse56 .cse3) c_main_~sum~0))) 0)) (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_212 (Array Int Int))) (= (let ((.cse61 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_218) |c_main_~#array2~0.base|) .cse15 (let ((.cse63 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_212) |c_main_~#array2~0.base|))) (+ (select .cse63 .cse47) (select .cse63 .cse33)))))) (let ((.cse60 (select (store .cse62 |c_main_~#array2~0.base| .cse61) |c_main_~#array1~0.base|))) (+ (select .cse60 .cse3) (select .cse61 |c_main_~#array2~0.offset|) (select .cse61 .cse7) (select .cse60 |c_main_~#array1~0.offset|) (select .cse60 .cse6) (select .cse61 .cse5) c_main_~sum~0))) 0))) .cse23) (or .cse1 (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_212 (Array Int Int))) (= (let ((.cse64 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_218) |c_main_~#array2~0.base|) .cse9 (let ((.cse66 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_212) |c_main_~#array2~0.base|))) (+ (select .cse66 .cse47) (select .cse66 .cse33)))))) (let ((.cse65 (select (store .cse62 |c_main_~#array2~0.base| .cse64) |c_main_~#array1~0.base|))) (+ (select .cse64 .cse5) (select .cse65 .cse6) (select .cse64 .cse7) (select .cse65 |c_main_~#array1~0.offset|) (select .cse64 |c_main_~#array2~0.offset|) c_main_~sum~0 (select .cse65 .cse3)))) 0))))))))))))))) is different from false [2023-04-02 15:14:48,549 WARN L223 SmtUtils]: Spent 46.21s on a formula simplification. DAG size of input: 244 DAG size of output: 206 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:14:48,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:14:48,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328340532] [2023-04-02 15:14:48,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:14:48,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433044522] [2023-04-02 15:14:48,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433044522] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:14:48,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [245517643] [2023-04-02 15:14:48,556 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:14:48,557 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:14:48,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:14:48,557 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:14:48,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:14:48,589 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:14:49,486 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-02 15:14:49,503 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2023-04-02 15:14:49,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:14:49,515 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:15:04,643 WARN L223 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 213 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:15:20,920 WARN L223 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 210 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:15:24,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1151#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0) (= |#NULL.base| 0))' at error location [2023-04-02 15:15:24,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:15:24,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 15:15:24,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-04-02 15:15:24,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847623834] [2023-04-02 15:15:24,014 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 15:15:24,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 15:15:24,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:15:24,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 15:15:24,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2000, Unknown=3, NotChecked=92, Total=2352 [2023-04-02 15:15:24,015 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 15:15:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:15:29,692 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-04-02 15:15:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 15:15:29,695 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2023-04-02 15:15:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:15:29,695 INFO L225 Difference]: With dead ends: 57 [2023-04-02 15:15:29,695 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 15:15:29,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 94.5s TimeCoverageRelationStatistics Valid=344, Invalid=2737, Unknown=3, NotChecked=108, Total=3192 [2023-04-02 15:15:29,697 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:15:29,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 156 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 352 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-04-02 15:15:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 15:15:29,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2023-04-02 15:15:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 15:15:29,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-04-02 15:15:29,707 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 31 [2023-04-02 15:15:29,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:15:29,707 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-04-02 15:15:29,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 15:15:29,707 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-04-02 15:15:29,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 15:15:29,708 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:15:29,708 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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 15:15:29,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 15:15:29,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:29,911 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:15:29,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:15:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1888230652, now seen corresponding path program 4 times [2023-04-02 15:15:29,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:15:29,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645628177] [2023-04-02 15:15:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:29,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:15:29,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:15:29,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646882354] [2023-04-02 15:15:29,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:15:29,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:29,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:15:29,924 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 15:15:29,929 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 15:15:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:15:29,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 15:15:30,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:15:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:15:30,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:15:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 15:15:31,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:15:31,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645628177] [2023-04-02 15:15:31,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:15:31,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646882354] [2023-04-02 15:15:31,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646882354] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:15:31,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [103957091] [2023-04-02 15:15:31,150 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:15:31,150 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:15:31,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:15:31,151 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:15:31,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:15:31,186 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:15:32,017 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-02 15:15:32,038 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2023-04-02 15:15:32,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:15:32,052 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:15:42,375 WARN L223 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 213 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:15:53,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1552#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0) (= |#NULL.base| 0))' at error location [2023-04-02 15:15:53,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:15:53,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:15:53,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-04-02 15:15:53,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083279737] [2023-04-02 15:15:53,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:15:53,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 15:15:53,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:15:53,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 15:15:53,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1017, Unknown=2, NotChecked=0, Total=1190 [2023-04-02 15:15:53,776 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:15:55,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:15:55,053 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2023-04-02 15:15:55,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 15:15:55,054 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 32 [2023-04-02 15:15:55,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:15:55,055 INFO L225 Difference]: With dead ends: 66 [2023-04-02 15:15:55,055 INFO L226 Difference]: Without dead ends: 61 [2023-04-02 15:15:55,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=221, Invalid=1337, Unknown=2, NotChecked=0, Total=1560 [2023-04-02 15:15:55,056 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 15:15:55,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 159 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 15:15:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-02 15:15:55,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2023-04-02 15:15:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 15:15:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2023-04-02 15:15:55,066 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2023-04-02 15:15:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:15:55,067 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2023-04-02 15:15:55,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:15:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2023-04-02 15:15:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 15:15:55,067 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:15:55,067 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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 15:15:55,073 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 15:15:55,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:55,269 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:15:55,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:15:55,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1053387532, now seen corresponding path program 5 times [2023-04-02 15:15:55,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:15:55,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714500359] [2023-04-02 15:15:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:55,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:15:55,282 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:15:55,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385515545] [2023-04-02 15:15:55,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:15:55,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:55,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:15:55,283 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 15:15:55,284 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 15:15:55,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 15:15:55,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:15:55,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 15:15:55,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:15:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:15:56,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:15:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 15:15:56,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:15:56,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714500359] [2023-04-02 15:15:56,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:15:56,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385515545] [2023-04-02 15:15:56,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385515545] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:15:56,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [200663252] [2023-04-02 15:15:56,596 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:15:56,596 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:15:56,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:15:56,596 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:15:56,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:15:56,622 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:15:57,398 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-02 15:15:57,416 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2023-04-02 15:15:57,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:15:57,428 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:16:10,857 WARN L223 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 213 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:16:28,146 WARN L223 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 210 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:16:30,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1971#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0) (= |#NULL.base| 0))' at error location [2023-04-02 15:16:30,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:16:30,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:16:30,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-04-02 15:16:30,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365503921] [2023-04-02 15:16:30,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:16:30,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 15:16:30,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:16:30,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 15:16:30,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=999, Unknown=5, NotChecked=0, Total=1190 [2023-04-02 15:16:30,122 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:16:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:16:31,179 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2023-04-02 15:16:31,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 15:16:31,179 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 32 [2023-04-02 15:16:31,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:16:31,180 INFO L225 Difference]: With dead ends: 67 [2023-04-02 15:16:31,180 INFO L226 Difference]: Without dead ends: 56 [2023-04-02 15:16:31,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=237, Invalid=1318, Unknown=5, NotChecked=0, Total=1560 [2023-04-02 15:16:31,183 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 15:16:31,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 105 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 15:16:31,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-02 15:16:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2023-04-02 15:16:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 15:16:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2023-04-02 15:16:31,194 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 32 [2023-04-02 15:16:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:16:31,195 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2023-04-02 15:16:31,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:16:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2023-04-02 15:16:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 15:16:31,195 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:16:31,195 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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 15:16:31,202 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 15:16:31,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:16:31,400 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:16:31,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:16:31,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1521013826, now seen corresponding path program 6 times [2023-04-02 15:16:31,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:16:31,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187993441] [2023-04-02 15:16:31,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:16:31,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:16:31,411 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:16:31,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698632159] [2023-04-02 15:16:31,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:16:31,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:16:31,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:16:31,416 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 15:16:31,416 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 15:16:32,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:16:32,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:16:32,637 WARN L260 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 115 conjunts are in the unsatisfiable core [2023-04-02 15:16:32,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:16:32,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-02 15:16:32,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:32,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-04-02 15:16:32,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-04-02 15:16:32,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 15:16:32,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-02 15:16:33,174 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 0 case distinctions, treesize of input 42 treesize of output 37 [2023-04-02 15:16:33,461 INFO L321 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2023-04-02 15:16:33,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 58 treesize of output 59 [2023-04-02 15:16:33,832 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2023-04-02 15:16:33,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 74 treesize of output 81 [2023-04-02 15:16:37,704 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 15:16:37,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 1016 treesize of output 933 [2023-04-02 15:16:37,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:37,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:37,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:37,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:37,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:37,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:37,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:37,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:37,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:37,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:38,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:38,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:38,018 INFO L217 Elim1Store]: Index analysis took 252 ms [2023-04-02 15:16:38,086 INFO L321 Elim1Store]: treesize reduction 98, result has 1.0 percent of original size [2023-04-02 15:16:38,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 39 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 6 case distinctions, treesize of input 221 treesize of output 304 [2023-04-02 15:16:38,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:38,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:38,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:38,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:38,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:38,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:39,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:39,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:39,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:39,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:39,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:39,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:39,195 INFO L217 Elim1Store]: Index analysis took 390 ms [2023-04-02 15:16:39,267 INFO L321 Elim1Store]: treesize reduction 98, result has 1.0 percent of original size [2023-04-02 15:16:39,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 39 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 6 case distinctions, treesize of input 525 treesize of output 448 [2023-04-02 15:16:54,527 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-02 15:16:54,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 240 [2023-04-02 15:16:54,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:54,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:54,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:54,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:54,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:54,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:54,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:54,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:54,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:54,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:55,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:55,124 INFO L217 Elim1Store]: Index analysis took 491 ms [2023-04-02 15:16:56,068 INFO L321 Elim1Store]: treesize reduction 19, result has 74.7 percent of original size [2023-04-02 15:16:56,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 136 [2023-04-02 15:16:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:56,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:56,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:56,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:56,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:56,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:56,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:56,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:56,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:16:56,396 INFO L217 Elim1Store]: Index analysis took 223 ms [2023-04-02 15:16:57,155 INFO L321 Elim1Store]: treesize reduction 19, result has 74.7 percent of original size [2023-04-02 15:16:57,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 179 [2023-04-02 15:16:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:16:59,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:17:04,815 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse53 (mod (+ c_main_~index~0 c_main_~pivot~0) 4294967296)) (.cse55 (mod c_main_~index~0 4294967296))) (let ((.cse36 (mod (+ (* 4294967295 c_main_~pivot~0) c_main_~index~0) 4294967296)) (.cse56 (* 4 .cse55)) (.cse8 (select |c_#memory_int| |c_main_~#array1~0.base|)) (.cse54 (* 4 .cse53))) (let ((.cse24 (<= .cse53 2147483647)) (.cse13 (+ (- 17179869184) |c_main_~#array2~0.offset| .cse54)) (.cse22 (select .cse8 (+ (- 17179869184) |c_main_~#array1~0.offset| .cse54))) (.cse9 (+ .cse56 |c_main_~#array1~0.offset|)) (.cse11 (+ |c_main_~#array2~0.offset| .cse56)) (.cse15 (< 2147483647 .cse55)) (.cse7 (+ |c_main_~#array2~0.offset| 4)) (.cse6 (+ |c_main_~#array2~0.offset| 8)) (.cse1 (+ |c_main_~#array1~0.offset| 4)) (.cse4 (+ |c_main_~#array2~0.offset| 12)) (.cse2 (+ 12 |c_main_~#array1~0.offset|)) (.cse5 (+ 8 |c_main_~#array1~0.offset|)) (.cse18 (+ (- 17179869184) .cse56 |c_main_~#array1~0.offset|)) (.cse19 (+ (- 17179869184) |c_main_~#array2~0.offset| .cse56)) (.cse29 (+ |c_main_~#array2~0.offset| .cse54)) (.cse21 (<= .cse55 2147483647)) (.cse33 (select .cse8 (+ |c_main_~#array1~0.offset| .cse54))) (.cse34 (< 2147483647 .cse53)) (.cse35 (* 4 .cse36))) (and (or (let ((.cse14 (+ .cse35 |c_main_~#array2~0.offset|)) (.cse23 (select .cse8 (+ .cse35 |c_main_~#array1~0.offset|)))) (and (or (let ((.cse10 (+ .cse22 .cse23))) (and (or (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_456 (Array Int Int))) (= (let ((.cse3 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_454) |c_main_~#array2~0.base|) .cse11 (let ((.cse12 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_456) |c_main_~#array2~0.base|))) (+ (select .cse12 .cse13) (select .cse12 .cse14)))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse8 .cse9 .cse10)) |c_main_~#array2~0.base| .cse3) |c_main_~#array1~0.base|))) (+ (select .cse0 .cse1) (select .cse0 .cse2) (select .cse3 .cse4) (select .cse0 .cse5) (select .cse0 |c_main_~#array1~0.offset|) (select .cse3 |c_main_~#array2~0.offset|) (select .cse3 .cse6) (select .cse3 .cse7) c_main_~sum~0))) 0)) .cse15) (or (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_456 (Array Int Int))) (= (let ((.cse17 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_454) |c_main_~#array2~0.base|) .cse19 (let ((.cse20 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_456) |c_main_~#array2~0.base|))) (+ (select .cse20 .cse13) (select .cse20 .cse14)))))) (let ((.cse16 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse8 .cse18 .cse10)) |c_main_~#array2~0.base| .cse17) |c_main_~#array1~0.base|))) (+ (select .cse16 .cse2) (select .cse16 |c_main_~#array1~0.offset|) (select .cse17 .cse4) (select .cse16 .cse5) (select .cse17 |c_main_~#array2~0.offset|) (select .cse17 .cse6) (select .cse16 .cse1) (select .cse17 .cse7) c_main_~sum~0))) 0)) .cse21))) .cse24) (or (let ((.cse27 (+ .cse33 .cse23))) (and (or (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_456 (Array Int Int))) (= (let ((.cse26 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_454) |c_main_~#array2~0.base|) .cse19 (let ((.cse28 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_456) |c_main_~#array2~0.base|))) (+ (select .cse28 .cse14) (select .cse28 .cse29)))))) (let ((.cse25 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse8 .cse18 .cse27)) |c_main_~#array2~0.base| .cse26) |c_main_~#array1~0.base|))) (+ (select .cse25 .cse2) (select .cse26 |c_main_~#array2~0.offset|) (select .cse25 |c_main_~#array1~0.offset|) (select .cse25 .cse1) (select .cse26 .cse4) (select .cse25 .cse5) (select .cse26 .cse7) (select .cse26 .cse6) c_main_~sum~0))) 0)) .cse21) (or (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_456 (Array Int Int))) (= (let ((.cse30 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_454) |c_main_~#array2~0.base|) .cse11 (let ((.cse32 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_456) |c_main_~#array2~0.base|))) (+ (select .cse32 .cse14) (select .cse32 .cse29)))))) (let ((.cse31 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse8 .cse9 .cse27)) |c_main_~#array2~0.base| .cse30) |c_main_~#array1~0.base|))) (+ (select .cse30 |c_main_~#array2~0.offset|) (select .cse31 |c_main_~#array1~0.offset|) (select .cse31 .cse2) (select .cse31 .cse5) (select .cse30 .cse7) (select .cse30 .cse6) (select .cse31 .cse1) (select .cse30 .cse4) c_main_~sum~0))) 0)) .cse15))) .cse34))) (< 2147483647 .cse36)) (or (<= .cse36 2147483647) (let ((.cse41 (+ (- 17179869184) .cse35 |c_main_~#array2~0.offset|)) (.cse45 (select .cse8 (+ (- 17179869184) .cse35 |c_main_~#array1~0.offset|)))) (and (or .cse24 (let ((.cse39 (+ .cse22 .cse45))) (and (or (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_456 (Array Int Int))) (= (let ((.cse38 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_454) |c_main_~#array2~0.base|) .cse11 (let ((.cse40 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_456) |c_main_~#array2~0.base|))) (+ (select .cse40 .cse13) (select .cse40 .cse41)))))) (let ((.cse37 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse8 .cse9 .cse39)) |c_main_~#array2~0.base| .cse38) |c_main_~#array1~0.base|))) (+ (select .cse37 .cse1) (select .cse37 |c_main_~#array1~0.offset|) (select .cse38 .cse7) (select .cse37 .cse5) (select .cse37 .cse2) (select .cse38 .cse6) (select .cse38 .cse4) c_main_~sum~0 (select .cse38 |c_main_~#array2~0.offset|)))) 0)) .cse15) (or (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_456 (Array Int Int))) (= (let ((.cse43 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_454) |c_main_~#array2~0.base|) .cse19 (let ((.cse44 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_456) |c_main_~#array2~0.base|))) (+ (select .cse44 .cse13) (select .cse44 .cse41)))))) (let ((.cse42 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse8 .cse18 .cse39)) |c_main_~#array2~0.base| .cse43) |c_main_~#array1~0.base|))) (+ (select .cse42 .cse1) (select .cse43 .cse7) (select .cse43 |c_main_~#array2~0.offset|) (select .cse42 .cse2) (select .cse42 .cse5) (select .cse42 |c_main_~#array1~0.offset|) (select .cse43 .cse6) (select .cse43 .cse4) c_main_~sum~0))) 0)) .cse21)))) (or (let ((.cse48 (+ .cse33 .cse45))) (and (or (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_456 (Array Int Int))) (= (let ((.cse46 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_454) |c_main_~#array2~0.base|) .cse11 (let ((.cse49 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_456) |c_main_~#array2~0.base|))) (+ (select .cse49 .cse41) (select .cse49 .cse29)))))) (let ((.cse47 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse8 .cse9 .cse48)) |c_main_~#array2~0.base| .cse46) |c_main_~#array1~0.base|))) (+ (select .cse46 |c_main_~#array2~0.offset|) (select .cse46 .cse7) (select .cse46 .cse4) (select .cse46 .cse6) (select .cse47 .cse5) (select .cse47 .cse1) (select .cse47 .cse2) c_main_~sum~0 (select .cse47 |c_main_~#array1~0.offset|)))) 0)) .cse15) (or (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_456 (Array Int Int))) (= (let ((.cse50 (store (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_454) |c_main_~#array2~0.base|) .cse19 (let ((.cse52 (select (store |c_#memory_int| |c_main_~#array1~0.base| v_ArrVal_456) |c_main_~#array2~0.base|))) (+ (select .cse52 .cse41) (select .cse52 .cse29)))))) (let ((.cse51 (select (store (store |c_#memory_int| |c_main_~#array1~0.base| (store .cse8 .cse18 .cse48)) |c_main_~#array2~0.base| .cse50) |c_main_~#array1~0.base|))) (+ (select .cse50 .cse7) (select .cse51 |c_main_~#array1~0.offset|) (select .cse50 .cse6) (select .cse51 .cse1) (select .cse50 .cse4) (select .cse51 .cse2) (select .cse50 |c_main_~#array2~0.offset|) (select .cse51 .cse5) c_main_~sum~0))) 0)) .cse21))) .cse34)))))))) (<= c_~ARR_SIZE~0 3)) is different from false