/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-multidimensional/copy-partial-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:58:41,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:58:41,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:58:41,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:58:41,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:58:41,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:58:41,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:58:41,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:58:41,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:58:41,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:58:41,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:58:41,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:58:41,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:58:41,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:58:41,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:58:41,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:58:41,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:58:41,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:58:41,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:58:41,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:58:41,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:58:41,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:58:41,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:58:41,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:58:41,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:58:41,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:58:41,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:58:41,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:58:41,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:58:41,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:58:41,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:58:41,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:58:41,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:58:41,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:58:41,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:58:41,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:58:41,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:58:41,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:58:41,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:58:41,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:58:41,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:58:41,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:58:41,742 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:58:41,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:58:41,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:58:41,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:58:41,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:58:41,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:58:41,744 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:58:41,744 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:58:41,744 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:58:41,744 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:58:41,744 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:58:41,744 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:58:41,745 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:58:41,745 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:58:41,745 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:58:41,745 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:58:41,745 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:58:41,745 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:58:41,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:58:41,746 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:58:41,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:58:41,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:58:41,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:58:41,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:58:41,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:58:41,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:58:41,747 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:58:41,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:58:41,747 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:58:41,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:58:41,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:58:41,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:58:41,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:58:41,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:58:41,748 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:58:41,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:58:41,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:58:41,749 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:58:41,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:58:41,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:58:41,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:58:41,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:58:41,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:58:42,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:58:42,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:58:42,013 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:58:42,014 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:58:42,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2023-04-02 14:58:43,256 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:58:43,448 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:58:43,448 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2023-04-02 14:58:43,454 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46fa4d8e4/18da39ac559e41ad81827829c6e5fee2/FLAGcd3d4276c [2023-04-02 14:58:43,467 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46fa4d8e4/18da39ac559e41ad81827829c6e5fee2 [2023-04-02 14:58:43,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:58:43,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:58:43,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:58:43,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:58:43,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:58:43,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:58:43" (1/1) ... [2023-04-02 14:58:43,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c3258a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:58:43, skipping insertion in model container [2023-04-02 14:58:43,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:58:43" (1/1) ... [2023-04-02 14:58:43,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:58:43,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:58:43,612 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-multidimensional/copy-partial-2-n-u.c[416,429] [2023-04-02 14:58:43,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:58:43,647 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:58:43,655 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-multidimensional/copy-partial-2-n-u.c[416,429] [2023-04-02 14:58:43,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:58:43,675 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:58:43,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:58:43 WrapperNode [2023-04-02 14:58:43,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:58:43,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:58:43,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:58:43,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:58:43,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:58:43" (1/1) ... [2023-04-02 14:58:43,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:58:43" (1/1) ... [2023-04-02 14:58:43,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:58:43" (1/1) ... [2023-04-02 14:58:43,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:58:43" (1/1) ... [2023-04-02 14:58:43,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:58:43" (1/1) ... [2023-04-02 14:58:43,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:58:43" (1/1) ... [2023-04-02 14:58:43,704 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:58:43" (1/1) ... [2023-04-02 14:58:43,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:58:43" (1/1) ... [2023-04-02 14:58:43,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:58:43,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:58:43,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:58:43,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:58:43,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:58:43" (1/1) ... [2023-04-02 14:58:43,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:58:43,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:58:43,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:58:43,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:58:43,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:58:43,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:58:43,779 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:58:43,780 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 14:58:43,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:58:43,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:58:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:58:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:58:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:58:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:58:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 14:58:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:58:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:58:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:58:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:58:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:58:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:58:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:58:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:58:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:58:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:58:43,840 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:58:43,842 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:58:44,025 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:58:44,080 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:58:44,080 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-02 14:58:44,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:58:44 BoogieIcfgContainer [2023-04-02 14:58:44,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:58:44,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:58:44,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:58:44,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:58:44,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:58:43" (1/3) ... [2023-04-02 14:58:44,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75467219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:58:44, skipping insertion in model container [2023-04-02 14:58:44,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:58:43" (2/3) ... [2023-04-02 14:58:44,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75467219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:58:44, skipping insertion in model container [2023-04-02 14:58:44,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:58:44" (3/3) ... [2023-04-02 14:58:44,091 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2023-04-02 14:58:44,118 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:58:44,118 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:58:44,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:58:44,162 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;@1cdc4f14, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:58:44,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:58:44,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:58:44,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 14:58:44,173 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:58:44,174 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:58:44,175 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:58:44,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:58:44,179 INFO L85 PathProgramCache]: Analyzing trace with hash -148631764, now seen corresponding path program 1 times [2023-04-02 14:58:44,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:58:44,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649880697] [2023-04-02 14:58:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:44,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:58:44,277 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:58:44,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695588305] [2023-04-02 14:58:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:44,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:44,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:58:44,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:58:44,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:58:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:58:44,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:58:44,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:58:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:58:44,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:58:44,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:58:44,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649880697] [2023-04-02 14:58:44,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:58:44,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695588305] [2023-04-02 14:58:44,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695588305] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:58:44,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:58:44,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 14:58:44,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218864787] [2023-04-02 14:58:44,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:58:44,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 14:58:44,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:58:44,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 14:58:44,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:58:44,593 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:58:44,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:58:44,668 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2023-04-02 14:58:44,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 14:58:44,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2023-04-02 14:58:44,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:58:44,677 INFO L225 Difference]: With dead ends: 51 [2023-04-02 14:58:44,678 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 14:58:44,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:58:44,683 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:58:44,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 44 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:58:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 14:58:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2023-04-02 14:58:44,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:58:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-04-02 14:58:44,718 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 20 [2023-04-02 14:58:44,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:58:44,718 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-04-02 14:58:44,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:58:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-04-02 14:58:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 14:58:44,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:58:44,720 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:58:44,727 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 14:58:44,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 14:58:44,926 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:58:44,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:58:44,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1162143584, now seen corresponding path program 1 times [2023-04-02 14:58:44,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:58:44,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594626082] [2023-04-02 14:58:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:44,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:58:44,947 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:58:44,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467462874] [2023-04-02 14:58:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:44,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:44,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:58:44,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:58:44,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:58:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:58:45,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:58:45,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:58:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:58:45,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:58:45,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:58:45,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594626082] [2023-04-02 14:58:45,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:58:45,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467462874] [2023-04-02 14:58:45,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467462874] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:58:45,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:58:45,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 14:58:45,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666549747] [2023-04-02 14:58:45,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:58:45,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 14:58:45,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:58:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 14:58:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:58:45,093 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:58:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:58:45,171 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2023-04-02 14:58:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 14:58:45,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2023-04-02 14:58:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:58:45,174 INFO L225 Difference]: With dead ends: 46 [2023-04-02 14:58:45,174 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 14:58:45,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:58:45,177 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:58:45,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 39 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:58:45,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 14:58:45,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2023-04-02 14:58:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:58:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-04-02 14:58:45,189 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2023-04-02 14:58:45,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:58:45,189 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-04-02 14:58:45,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:58:45,190 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-04-02 14:58:45,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 14:58:45,191 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:58:45,192 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:58:45,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:58:45,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 14:58:45,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:58:45,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:58:45,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1218257249, now seen corresponding path program 1 times [2023-04-02 14:58:45,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:58:45,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528208537] [2023-04-02 14:58:45,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:45,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:58:45,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:58:45,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371107003] [2023-04-02 14:58:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:45,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:45,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:58:45,422 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:58:45,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:58:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:58:45,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:58:45,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:58:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:58:45,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:58:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:58:45,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:58:45,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528208537] [2023-04-02 14:58:45,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:58:45,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371107003] [2023-04-02 14:58:45,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371107003] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:58:45,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [824233417] [2023-04-02 14:58:45,632 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 14:58:45,633 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:58:45,636 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:58:45,641 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:58:45,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:58:45,721 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:58:46,581 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 14:58:46,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:58:46,591 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:58:46,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [824233417] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:58:46,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:58:46,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [5, 5] total 20 [2023-04-02 14:58:46,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264886968] [2023-04-02 14:58:46,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:58:46,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 14:58:46,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:58:46,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 14:58:46,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-04-02 14:58:46,982 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:58:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:58:48,336 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-04-02 14:58:48,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 14:58:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-04-02 14:58:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:58:48,338 INFO L225 Difference]: With dead ends: 45 [2023-04-02 14:58:48,338 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 14:58:48,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2023-04-02 14:58:48,344 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 81 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:58:48,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 14 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:58:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 14:58:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2023-04-02 14:58:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:58:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-04-02 14:58:48,373 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 23 [2023-04-02 14:58:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:58:48,373 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-04-02 14:58:48,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:58:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-04-02 14:58:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 14:58:48,374 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:58:48,374 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:58:48,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:58:48,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:48,581 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:58:48,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:58:48,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1827176502, now seen corresponding path program 1 times [2023-04-02 14:58:48,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:58:48,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478627777] [2023-04-02 14:58:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:48,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:58:48,598 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:58:48,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694210186] [2023-04-02 14:58:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:48,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:48,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:58:48,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:58:48,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:58:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:58:48,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:58:48,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:58:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 14:58:48,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:58:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 14:58:48,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:58:48,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478627777] [2023-04-02 14:58:48,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:58:48,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694210186] [2023-04-02 14:58:48,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694210186] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:58:48,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [212159353] [2023-04-02 14:58:48,741 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 14:58:48,741 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:58:48,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:58:48,742 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:58:48,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:58:48,766 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:58:49,234 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-02 14:58:49,248 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 14:58:49,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:58:49,254 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:58:49,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '856#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#A~0.base_BEFORE_CALL_11| Int) (|v_main_~#B~0.base_BEFORE_CALL_11| Int) (|v_main_~#A~0.offset_BEFORE_CALL_11| Int) (|v_main_~#B~0.offset_BEFORE_CALL_11| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_11|) |v_main_~#A~0.offset_BEFORE_CALL_11|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_11|) |v_main_~#B~0.offset_BEFORE_CALL_11|)))))' at error location [2023-04-02 14:58:49,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:58:49,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:58:49,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 14:58:49,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533952631] [2023-04-02 14:58:49,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:58:49,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 14:58:49,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:58:49,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 14:58:49,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-04-02 14:58:49,747 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:58:49,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:58:49,895 INFO L93 Difference]: Finished difference Result 76 states and 106 transitions. [2023-04-02 14:58:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 14:58:49,896 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 26 [2023-04-02 14:58:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:58:49,897 INFO L225 Difference]: With dead ends: 76 [2023-04-02 14:58:49,897 INFO L226 Difference]: Without dead ends: 57 [2023-04-02 14:58:49,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-04-02 14:58:49,902 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:58:49,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:58:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-02 14:58:49,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2023-04-02 14:58:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:58:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-04-02 14:58:49,927 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 26 [2023-04-02 14:58:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:58:49,927 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-04-02 14:58:49,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:58:49,928 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-04-02 14:58:49,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 14:58:49,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:58:49,929 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 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 14:58:49,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:58:50,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:50,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:58:50,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:58:50,140 INFO L85 PathProgramCache]: Analyzing trace with hash -62760343, now seen corresponding path program 2 times [2023-04-02 14:58:50,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:58:50,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497395651] [2023-04-02 14:58:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:50,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:58:50,163 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:58:50,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004262002] [2023-04-02 14:58:50,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:58:50,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:50,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:58:50,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:58:50,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:58:50,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:58:50,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:58:50,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:58:50,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:58:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 14:58:50,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:58:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 14:58:50,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:58:50,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497395651] [2023-04-02 14:58:50,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:58:50,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004262002] [2023-04-02 14:58:50,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004262002] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:58:50,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [169541247] [2023-04-02 14:58:50,309 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 14:58:50,310 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:58:50,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:58:50,310 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:58:50,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:58:50,326 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:58:50,733 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-02 14:58:50,739 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 14:58:50,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:58:50,744 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:58:51,217 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1247#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#B~0.offset_BEFORE_CALL_18| Int) (|v_main_~#A~0.base_BEFORE_CALL_18| Int) (|v_main_~#B~0.base_BEFORE_CALL_18| Int) (|v_main_~#A~0.offset_BEFORE_CALL_18| Int)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_18|) |v_main_~#B~0.offset_BEFORE_CALL_18|) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_18|) |v_main_~#A~0.offset_BEFORE_CALL_18|)))))' at error location [2023-04-02 14:58:51,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:58:51,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:58:51,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 14:58:51,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172983896] [2023-04-02 14:58:51,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:58:51,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 14:58:51,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:58:51,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 14:58:51,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-04-02 14:58:51,219 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:58:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:58:51,367 INFO L93 Difference]: Finished difference Result 89 states and 119 transitions. [2023-04-02 14:58:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 14:58:51,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2023-04-02 14:58:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:58:51,368 INFO L225 Difference]: With dead ends: 89 [2023-04-02 14:58:51,368 INFO L226 Difference]: Without dead ends: 73 [2023-04-02 14:58:51,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-04-02 14:58:51,370 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:58:51,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 61 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:58:51,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-02 14:58:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2023-04-02 14:58:51,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:58:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2023-04-02 14:58:51,392 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 29 [2023-04-02 14:58:51,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:58:51,392 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2023-04-02 14:58:51,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:58:51,392 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2023-04-02 14:58:51,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 14:58:51,393 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:58:51,393 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:58:51,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 14:58:51,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:51,600 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:58:51,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:58:51,600 INFO L85 PathProgramCache]: Analyzing trace with hash 160676685, now seen corresponding path program 3 times [2023-04-02 14:58:51,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:58:51,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358692956] [2023-04-02 14:58:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:51,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:58:51,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:58:51,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271391904] [2023-04-02 14:58:51,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:58:51,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:51,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:58:51,628 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:58:51,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 14:58:51,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:58:51,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:58:51,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-02 14:58:51,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:58:51,828 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-04-02 14:58:51,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-04-02 14:58:51,882 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-04-02 14:58:51,883 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 26 treesize of output 10 [2023-04-02 14:58:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 81 proven. 82 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-04-02 14:58:51,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:58:52,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:58:52,057 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 117 treesize of output 113 [2023-04-02 14:58:52,134 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2023-04-02 14:58:52,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2023-04-02 14:58:52,146 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-04-02 14:58:52,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 20 [2023-04-02 14:58:52,156 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2023-04-02 14:58:52,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2023-04-02 14:58:52,174 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-04-02 14:58:52,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 35 [2023-04-02 14:58:52,178 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 22 treesize of output 20 [2023-04-02 14:58:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2023-04-02 14:58:52,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:58:52,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358692956] [2023-04-02 14:58:52,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:58:52,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271391904] [2023-04-02 14:58:52,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271391904] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:58:52,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [275427487] [2023-04-02 14:58:52,254 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 14:58:52,254 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:58:52,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:58:52,255 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:58:52,255 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:58:52,286 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:58:52,950 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-02 14:58:52,956 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 14:58:52,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:58:52,961 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:58:53,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1824#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#A~0.base_BEFORE_CALL_25| Int) (|v_main_~#B~0.base_BEFORE_CALL_25| Int) (|v_main_~#B~0.offset_BEFORE_CALL_25| Int) (|v_main_~#A~0.offset_BEFORE_CALL_25| Int)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_25|) |v_main_~#B~0.offset_BEFORE_CALL_25|) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_25|) |v_main_~#A~0.offset_BEFORE_CALL_25|)))))' at error location [2023-04-02 14:58:53,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:58:53,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:58:53,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2023-04-02 14:58:53,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756869684] [2023-04-02 14:58:53,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:58:53,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 14:58:53,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:58:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 14:58:53,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 14:58:53,615 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:58:54,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:58:54,298 INFO L93 Difference]: Finished difference Result 101 states and 137 transitions. [2023-04-02 14:58:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 14:58:54,298 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2023-04-02 14:58:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:58:54,299 INFO L225 Difference]: With dead ends: 101 [2023-04-02 14:58:54,299 INFO L226 Difference]: Without dead ends: 99 [2023-04-02 14:58:54,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=2556, Unknown=0, NotChecked=0, Total=2862 [2023-04-02 14:58:54,301 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 159 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 14:58:54,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 162 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 14:58:54,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-04-02 14:58:54,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 64. [2023-04-02 14:58:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 54 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:58:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2023-04-02 14:58:54,345 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 47 [2023-04-02 14:58:54,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:58:54,347 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2023-04-02 14:58:54,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:58:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2023-04-02 14:58:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 14:58:54,349 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:58:54,349 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:58:54,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 14:58:54,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:54,555 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:58:54,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:58:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1039330120, now seen corresponding path program 4 times [2023-04-02 14:58:54,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:58:54,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459903927] [2023-04-02 14:58:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:54,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:58:54,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:58:54,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001641091] [2023-04-02 14:58:54,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:58:54,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:54,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:58:54,573 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:58:54,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 14:58:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:58:54,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 14:58:54,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:58:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-04-02 14:58:54,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:58:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-04-02 14:58:54,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:58:54,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459903927] [2023-04-02 14:58:54,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:58:54,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001641091] [2023-04-02 14:58:54,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001641091] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:58:54,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [275577617] [2023-04-02 14:58:54,780 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 14:58:54,780 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:58:54,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:58:54,781 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:58:54,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:58:54,796 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:58:55,220 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-02 14:58:55,224 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 14:58:55,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:58:55,228 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:58:55,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2464#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#A~0.base_BEFORE_CALL_32| Int) (|v_main_~#A~0.offset_BEFORE_CALL_32| Int) (|v_main_~#B~0.base_BEFORE_CALL_32| Int) (|v_main_~#B~0.offset_BEFORE_CALL_32| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_32|) |v_main_~#A~0.offset_BEFORE_CALL_32|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_32|) |v_main_~#B~0.offset_BEFORE_CALL_32|)))))' at error location [2023-04-02 14:58:55,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:58:55,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:58:55,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 14:58:55,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111559724] [2023-04-02 14:58:55,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:58:55,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 14:58:55,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:58:55,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 14:58:55,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2023-04-02 14:58:55,640 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:58:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:58:55,932 INFO L93 Difference]: Finished difference Result 196 states and 288 transitions. [2023-04-02 14:58:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 14:58:55,933 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2023-04-02 14:58:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:58:55,935 INFO L225 Difference]: With dead ends: 196 [2023-04-02 14:58:55,936 INFO L226 Difference]: Without dead ends: 148 [2023-04-02 14:58:55,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 14:58:55,937 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 188 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:58:55,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 49 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:58:55,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-04-02 14:58:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 88. [2023-04-02 14:58:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 78 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:58:55,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2023-04-02 14:58:55,989 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 48 [2023-04-02 14:58:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:58:55,989 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2023-04-02 14:58:55,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:58:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2023-04-02 14:58:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 14:58:55,995 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:58:55,995 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:58:56,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 14:58:56,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:56,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:58:56,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:58:56,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1675124680, now seen corresponding path program 5 times [2023-04-02 14:58:56,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:58:56,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889610314] [2023-04-02 14:58:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:56,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:58:56,233 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:58:56,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906214331] [2023-04-02 14:58:56,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:58:56,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:56,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:58:56,235 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:58:56,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 14:58:56,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:58:56,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:58:56,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:58:56,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:58:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2023-04-02 14:58:56,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:58:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2023-04-02 14:58:56,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:58:56,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889610314] [2023-04-02 14:58:56,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:58:56,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906214331] [2023-04-02 14:58:56,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906214331] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:58:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1973376839] [2023-04-02 14:58:56,498 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 14:58:56,498 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:58:56,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:58:56,499 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:58:56,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:58:56,514 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:58:56,866 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-02 14:58:56,871 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 14:58:56,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:58:56,874 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:58:57,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3454#(and (exists ((|v_main_~#B~0.base_BEFORE_CALL_39| Int) (|v_main_~#A~0.base_BEFORE_CALL_39| Int) (|v_main_~#A~0.offset_BEFORE_CALL_39| Int) (|v_main_~#B~0.offset_BEFORE_CALL_39| Int)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_39|) |v_main_~#B~0.offset_BEFORE_CALL_39|) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_39|) |v_main_~#A~0.offset_BEFORE_CALL_39|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:58:57,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:58:57,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:58:57,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 14:58:57,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953172119] [2023-04-02 14:58:57,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:58:57,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 14:58:57,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:58:57,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 14:58:57,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-04-02 14:58:57,273 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:58:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:58:57,392 INFO L93 Difference]: Finished difference Result 129 states and 158 transitions. [2023-04-02 14:58:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 14:58:57,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 72 [2023-04-02 14:58:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:58:57,393 INFO L225 Difference]: With dead ends: 129 [2023-04-02 14:58:57,393 INFO L226 Difference]: Without dead ends: 110 [2023-04-02 14:58:57,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-04-02 14:58:57,394 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:58:57,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 71 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:58:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-02 14:58:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81. [2023-04-02 14:58:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 72 states have internal predecessors, (84), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:58:57,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2023-04-02 14:58:57,425 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 72 [2023-04-02 14:58:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:58:57,425 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2023-04-02 14:58:57,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:58:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2023-04-02 14:58:57,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-02 14:58:57,426 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:58:57,426 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:58:57,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 14:58:57,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 14:58:57,632 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:58:57,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:58:57,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1757394159, now seen corresponding path program 6 times [2023-04-02 14:58:57,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:58:57,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825408811] [2023-04-02 14:58:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:57,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:58:57,653 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:58:57,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988323964] [2023-04-02 14:58:57,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:58:57,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:57,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:58:57,655 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:58:57,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 14:58:57,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:58:57,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:58:57,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:58:57,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:58:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2023-04-02 14:58:57,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:58:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2023-04-02 14:58:57,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:58:57,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825408811] [2023-04-02 14:58:57,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:58:57,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988323964] [2023-04-02 14:58:57,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988323964] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:58:57,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144436530] [2023-04-02 14:58:57,803 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 14:58:57,803 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:58:57,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:58:57,804 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:58:57,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:58:57,816 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:58:58,157 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-02 14:58:58,161 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 14:58:58,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:58:58,164 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:58:58,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4331#(and (exists ((|v_main_~#A~0.base_BEFORE_CALL_46| Int) (|v_main_~#B~0.base_BEFORE_CALL_46| Int) (|v_main_~#A~0.offset_BEFORE_CALL_46| Int) (|v_main_~#B~0.offset_BEFORE_CALL_46| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_46|) |v_main_~#A~0.offset_BEFORE_CALL_46|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_46|) |v_main_~#B~0.offset_BEFORE_CALL_46|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:58:58,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:58:58,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:58:58,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-04-02 14:58:58,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6748855] [2023-04-02 14:58:58,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:58:58,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 14:58:58,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:58:58,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 14:58:58,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-04-02 14:58:58,568 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 14:58:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:58:58,665 INFO L93 Difference]: Finished difference Result 115 states and 141 transitions. [2023-04-02 14:58:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:58:58,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2023-04-02 14:58:58,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:58:58,666 INFO L225 Difference]: With dead ends: 115 [2023-04-02 14:58:58,666 INFO L226 Difference]: Without dead ends: 87 [2023-04-02 14:58:58,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-04-02 14:58:58,667 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:58:58,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 79 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:58:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-04-02 14:58:58,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2023-04-02 14:58:58,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.162162162162162) internal successors, (86), 74 states have internal predecessors, (86), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:58:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2023-04-02 14:58:58,698 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 77 [2023-04-02 14:58:58,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:58:58,699 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2023-04-02 14:58:58,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 14:58:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2023-04-02 14:58:58,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 14:58:58,700 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:58:58,700 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:58:58,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 14:58:58,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:58,909 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:58:58,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:58:58,909 INFO L85 PathProgramCache]: Analyzing trace with hash -953869508, now seen corresponding path program 7 times [2023-04-02 14:58:58,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:58:58,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577534528] [2023-04-02 14:58:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:58:58,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:58:58,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587544737] [2023-04-02 14:58:58,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:58:58,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:58,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:58:58,930 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:58:58,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 14:58:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:58:59,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 14:58:59,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:58:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-04-02 14:58:59,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:58:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-04-02 14:58:59,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:58:59,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577534528] [2023-04-02 14:58:59,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:58:59,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587544737] [2023-04-02 14:58:59,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587544737] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:58:59,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [675998965] [2023-04-02 14:58:59,351 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 14:58:59,351 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:58:59,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:58:59,352 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:58:59,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:58:59,373 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:58:59,639 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-02 14:58:59,642 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 14:58:59,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:58:59,645 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:59:00,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5229#(and (exists ((|v_main_~#A~0.base_BEFORE_CALL_53| Int) (|v_main_~#B~0.base_BEFORE_CALL_53| Int) (|v_main_~#A~0.offset_BEFORE_CALL_53| Int) (|v_main_~#B~0.offset_BEFORE_CALL_53| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_53|) |v_main_~#A~0.offset_BEFORE_CALL_53|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_53|) |v_main_~#B~0.offset_BEFORE_CALL_53|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:59:00,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:59:00,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:59:00,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-02 14:59:00,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943040816] [2023-04-02 14:59:00,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:59:00,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 14:59:00,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:59:00,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 14:59:00,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 14:59:00,022 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:59:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:59:00,785 INFO L93 Difference]: Finished difference Result 447 states and 665 transitions. [2023-04-02 14:59:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 14:59:00,786 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 80 [2023-04-02 14:59:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:59:00,788 INFO L225 Difference]: With dead ends: 447 [2023-04-02 14:59:00,788 INFO L226 Difference]: Without dead ends: 386 [2023-04-02 14:59:00,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=655, Invalid=2315, Unknown=0, NotChecked=0, Total=2970 [2023-04-02 14:59:00,790 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 372 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:59:00,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 59 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 14:59:00,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-04-02 14:59:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 131. [2023-04-02 14:59:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 122 states have (on average 1.098360655737705) internal successors, (134), 122 states have internal predecessors, (134), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:59:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2023-04-02 14:59:00,855 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 80 [2023-04-02 14:59:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:59:00,855 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2023-04-02 14:59:00,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:59:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2023-04-02 14:59:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-02 14:59:00,856 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:59:00,856 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:59:00,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 14:59:01,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 14:59:01,063 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:59:01,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:59:01,063 INFO L85 PathProgramCache]: Analyzing trace with hash 302318652, now seen corresponding path program 8 times [2023-04-02 14:59:01,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:59:01,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812510468] [2023-04-02 14:59:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:59:01,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:59:01,100 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:59:01,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419693947] [2023-04-02 14:59:01,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:59:01,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:59:01,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:59:01,101 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:59:01,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 14:59:01,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 14:59:01,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:59:01,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:59:01,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:59:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4236 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 4219 trivial. 0 not checked. [2023-04-02 14:59:01,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:59:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4236 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4219 trivial. 0 not checked. [2023-04-02 14:59:01,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:59:01,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812510468] [2023-04-02 14:59:01,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:59:01,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419693947] [2023-04-02 14:59:01,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419693947] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:59:01,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2049663112] [2023-04-02 14:59:01,516 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 14:59:01,516 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:59:01,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:59:01,517 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:59:01,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:59:01,531 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:59:01,885 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-02 14:59:01,895 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 14:59:01,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:59:01,900 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:59:02,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7152#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#A~0.offset_BEFORE_CALL_60| Int) (|v_main_~#B~0.offset_BEFORE_CALL_60| Int) (|v_main_~#B~0.base_BEFORE_CALL_60| Int) (|v_main_~#A~0.base_BEFORE_CALL_60| Int)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_60|) |v_main_~#B~0.offset_BEFORE_CALL_60|) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_60|) |v_main_~#A~0.offset_BEFORE_CALL_60|)))))' at error location [2023-04-02 14:59:02,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:59:02,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:59:02,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 14:59:02,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292878550] [2023-04-02 14:59:02,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:59:02,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 14:59:02,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:59:02,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 14:59:02,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-04-02 14:59:02,289 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:59:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:59:02,410 INFO L93 Difference]: Finished difference Result 174 states and 209 transitions. [2023-04-02 14:59:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 14:59:02,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 128 [2023-04-02 14:59:02,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:59:02,411 INFO L225 Difference]: With dead ends: 174 [2023-04-02 14:59:02,411 INFO L226 Difference]: Without dead ends: 153 [2023-04-02 14:59:02,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2023-04-02 14:59:02,413 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:59:02,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 49 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:59:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-04-02 14:59:02,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2023-04-02 14:59:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 140 states have (on average 1.0857142857142856) internal successors, (152), 140 states have internal predecessors, (152), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 14:59:02,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 167 transitions. [2023-04-02 14:59:02,482 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 167 transitions. Word has length 128 [2023-04-02 14:59:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:59:02,482 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 167 transitions. [2023-04-02 14:59:02,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:59:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 167 transitions. [2023-04-02 14:59:02,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-02 14:59:02,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:59:02,483 INFO L195 NwaCegarLoop]: trace histogram [88, 16, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:59:02,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 14:59:02,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 14:59:02,689 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:59:02,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:59:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2064455980, now seen corresponding path program 9 times [2023-04-02 14:59:02,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:59:02,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204166546] [2023-04-02 14:59:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:59:02,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:59:02,732 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:59:02,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891982499] [2023-04-02 14:59:02,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:59:02,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:59:02,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:59:02,733 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:59:02,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 14:59:02,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:59:02,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:59:02,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 14:59:02,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:59:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4398 backedges. 160 proven. 3185 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2023-04-02 14:59:03,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:59:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4398 backedges. 160 proven. 3185 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2023-04-02 14:59:03,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:59:03,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204166546] [2023-04-02 14:59:03,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:59:03,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891982499] [2023-04-02 14:59:03,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891982499] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:59:03,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1264149297] [2023-04-02 14:59:03,711 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 14:59:03,711 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:59:03,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:59:03,712 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:59:03,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:59:03,725 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:59:04,002 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-02 14:59:04,006 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 14:59:04,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:59:04,008 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:59:04,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8656#(and (exists ((|v_main_~#A~0.base_BEFORE_CALL_67| Int) (|v_main_~#B~0.base_BEFORE_CALL_67| Int) (|v_main_~#A~0.offset_BEFORE_CALL_67| Int) (|v_main_~#B~0.offset_BEFORE_CALL_67| Int)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_67|) |v_main_~#B~0.offset_BEFORE_CALL_67|) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_67|) |v_main_~#A~0.offset_BEFORE_CALL_67|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:59:04,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:59:04,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:59:04,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-04-02 14:59:04,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558018157] [2023-04-02 14:59:04,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:59:04,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 14:59:04,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:59:04,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 14:59:04,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 14:59:04,509 INFO L87 Difference]: Start difference. First operand 152 states and 167 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:59:04,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:59:04,886 INFO L93 Difference]: Finished difference Result 326 states and 381 transitions. [2023-04-02 14:59:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 14:59:04,887 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 140 [2023-04-02 14:59:04,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:59:04,888 INFO L225 Difference]: With dead ends: 326 [2023-04-02 14:59:04,888 INFO L226 Difference]: Without dead ends: 281 [2023-04-02 14:59:04,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=1937, Unknown=0, NotChecked=0, Total=2256 [2023-04-02 14:59:04,890 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:59:04,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 110 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:59:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-04-02 14:59:04,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 176. [2023-04-02 14:59:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 164 states have (on average 1.079268292682927) internal successors, (177), 164 states have internal predecessors, (177), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 14:59:04,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 192 transitions. [2023-04-02 14:59:04,967 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 192 transitions. Word has length 140 [2023-04-02 14:59:04,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:59:04,967 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 192 transitions. [2023-04-02 14:59:04,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:59:04,968 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 192 transitions. [2023-04-02 14:59:04,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-02 14:59:04,968 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:59:04,969 INFO L195 NwaCegarLoop]: trace histogram [110, 16, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:59:04,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 14:59:05,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 14:59:05,170 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:59:05,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:59:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash -750342848, now seen corresponding path program 10 times [2023-04-02 14:59:05,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:59:05,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742672836] [2023-04-02 14:59:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:59:05,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:59:05,221 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:59:05,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971250200] [2023-04-02 14:59:05,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:59:05,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:59:05,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:59:05,223 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:59:05,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 14:59:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:59:05,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 1277 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 14:59:05,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:59:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6772 backedges. 2121 proven. 253 refuted. 0 times theorem prover too weak. 4398 trivial. 0 not checked. [2023-04-02 14:59:05,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:59:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6772 backedges. 2121 proven. 253 refuted. 0 times theorem prover too weak. 4398 trivial. 0 not checked. [2023-04-02 14:59:06,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:59:06,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742672836] [2023-04-02 14:59:06,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:59:06,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971250200] [2023-04-02 14:59:06,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971250200] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:59:06,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [16532088] [2023-04-02 14:59:06,339 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 14:59:06,339 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:59:06,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:59:06,339 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:59:06,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:59:06,359 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:59:06,657 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-02 14:59:06,662 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 14:59:06,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:59:06,666 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:59:07,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10670#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#A~0.offset_BEFORE_CALL_74| Int) (|v_main_~#B~0.base_BEFORE_CALL_74| Int) (|v_main_~#B~0.offset_BEFORE_CALL_74| Int) (|v_main_~#A~0.base_BEFORE_CALL_74| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_74|) |v_main_~#A~0.offset_BEFORE_CALL_74|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_74|) |v_main_~#B~0.offset_BEFORE_CALL_74|)))))' at error location [2023-04-02 14:59:07,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:59:07,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:59:07,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-02 14:59:07,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110883013] [2023-04-02 14:59:07,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:59:07,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-02 14:59:07,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:59:07,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-02 14:59:07,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1245, Invalid=3311, Unknown=0, NotChecked=0, Total=4556 [2023-04-02 14:59:07,086 INFO L87 Difference]: Start difference. First operand 176 states and 192 transitions. Second operand has 50 states, 50 states have (on average 1.34) internal successors, (67), 50 states have internal predecessors, (67), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:59:09,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:59:09,196 INFO L93 Difference]: Finished difference Result 945 states and 1390 transitions. [2023-04-02 14:59:09,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-02 14:59:09,196 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 50 states have internal predecessors, (67), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 164 [2023-04-02 14:59:09,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:59:09,199 INFO L225 Difference]: With dead ends: 945 [2023-04-02 14:59:09,199 INFO L226 Difference]: Without dead ends: 803 [2023-04-02 14:59:09,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3016 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2395, Invalid=5795, Unknown=0, NotChecked=0, Total=8190 [2023-04-02 14:59:09,202 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 619 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 14:59:09,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 69 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 14:59:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-04-02 14:59:09,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 296. [2023-04-02 14:59:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 284 states have (on average 1.045774647887324) internal successors, (297), 284 states have internal predecessors, (297), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 14:59:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 312 transitions. [2023-04-02 14:59:09,326 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 312 transitions. Word has length 164 [2023-04-02 14:59:09,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:59:09,327 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 312 transitions. [2023-04-02 14:59:09,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 50 states have internal predecessors, (67), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:59:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 312 transitions. [2023-04-02 14:59:09,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2023-04-02 14:59:09,330 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:59:09,330 INFO L195 NwaCegarLoop]: trace histogram [230, 16, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:59:09,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 14:59:09,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 14:59:09,534 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:59:09,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:59:09,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2062826944, now seen corresponding path program 11 times [2023-04-02 14:59:09,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:59:09,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096911162] [2023-04-02 14:59:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:59:09,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:59:09,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:59:09,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590343861] [2023-04-02 14:59:09,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:59:09,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:59:09,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:59:09,632 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:59:09,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 14:59:10,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-02 14:59:10,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:59:10,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 14:59:10,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:59:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 27712 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 27623 trivial. 0 not checked. [2023-04-02 14:59:10,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:59:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 27712 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 27623 trivial. 0 not checked. [2023-04-02 14:59:10,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:59:10,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096911162] [2023-04-02 14:59:10,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:59:10,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590343861] [2023-04-02 14:59:10,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590343861] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:59:10,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1157483420] [2023-04-02 14:59:10,995 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 14:59:10,995 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:59:10,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:59:10,995 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:59:10,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:59:11,008 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:59:11,373 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-02 14:59:11,377 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 14:59:11,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:59:11,381 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:59:11,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14855#(and (exists ((|v_main_~#A~0.offset_BEFORE_CALL_81| Int) (|v_main_~#B~0.offset_BEFORE_CALL_81| Int) (|v_main_~#A~0.base_BEFORE_CALL_81| Int) (|v_main_~#B~0.base_BEFORE_CALL_81| Int)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_81|) |v_main_~#B~0.offset_BEFORE_CALL_81|) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_81|) |v_main_~#A~0.offset_BEFORE_CALL_81|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 14:59:11,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:59:11,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:59:11,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 14:59:11,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55227565] [2023-04-02 14:59:11,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:59:11,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 14:59:11,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:59:11,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 14:59:11,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2023-04-02 14:59:11,773 INFO L87 Difference]: Start difference. First operand 296 states and 312 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:59:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:59:12,113 INFO L93 Difference]: Finished difference Result 378 states and 438 transitions. [2023-04-02 14:59:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 14:59:12,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 284 [2023-04-02 14:59:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:59:12,115 INFO L225 Difference]: With dead ends: 378 [2023-04-02 14:59:12,115 INFO L226 Difference]: Without dead ends: 339 [2023-04-02 14:59:12,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 821 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 14:59:12,116 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:59:12,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 79 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:59:12,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-04-02 14:59:12,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 338. [2023-04-02 14:59:12,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 320 states have (on average 1.040625) internal successors, (333), 320 states have internal predecessors, (333), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-02 14:59:12,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 360 transitions. [2023-04-02 14:59:12,280 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 360 transitions. Word has length 284 [2023-04-02 14:59:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:59:12,280 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 360 transitions. [2023-04-02 14:59:12,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 14:59:12,280 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 360 transitions. [2023-04-02 14:59:12,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-04-02 14:59:12,283 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:59:12,283 INFO L195 NwaCegarLoop]: trace histogram [230, 40, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:59:12,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 14:59:12,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:59:12,491 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:59:12,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:59:12,491 INFO L85 PathProgramCache]: Analyzing trace with hash 386626368, now seen corresponding path program 12 times [2023-04-02 14:59:12,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:59:12,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051801684] [2023-04-02 14:59:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:59:12,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:59:12,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:59:12,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993790493] [2023-04-02 14:59:12,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:59:12,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:59:12,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:59:12,603 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:59:12,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 14:59:59,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:59:59,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:59:59,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 2525 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 14:59:59,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:59:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 28468 backedges. 611 proven. 55 refuted. 0 times theorem prover too weak. 27802 trivial. 0 not checked. [2023-04-02 14:59:59,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:00:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 28468 backedges. 490 proven. 176 refuted. 0 times theorem prover too weak. 27802 trivial. 0 not checked. [2023-04-02 15:00:00,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:00:00,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051801684] [2023-04-02 15:00:00,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:00:00,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993790493] [2023-04-02 15:00:00,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993790493] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:00:00,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2124353476] [2023-04-02 15:00:00,243 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 15:00:00,243 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:00:00,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:00:00,244 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:00:00,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:00:00,266 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 15:00:00,592 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-02 15:00:00,597 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 15:00:00,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:00:00,601 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:00:01,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18141#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#B~0.base_BEFORE_CALL_88| Int) (|v_main_~#A~0.base_BEFORE_CALL_88| Int) (|v_main_~#A~0.offset_BEFORE_CALL_88| Int) (|v_main_~#B~0.offset_BEFORE_CALL_88| Int)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_88|) |v_main_~#B~0.offset_BEFORE_CALL_88|) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_88|) |v_main_~#A~0.offset_BEFORE_CALL_88|)))))' at error location [2023-04-02 15:00:01,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:00:01,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:00:01,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-02 15:00:01,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419030627] [2023-04-02 15:00:01,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:00:01,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 15:00:01,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:00:01,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 15:00:01,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1522, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 15:00:01,041 INFO L87 Difference]: Start difference. First operand 338 states and 360 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 15:00:01,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:00:01,717 INFO L93 Difference]: Finished difference Result 498 states and 606 transitions. [2023-04-02 15:00:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 15:00:01,718 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 308 [2023-04-02 15:00:01,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:00:01,719 INFO L225 Difference]: With dead ends: 498 [2023-04-02 15:00:01,720 INFO L226 Difference]: Without dead ends: 423 [2023-04-02 15:00:01,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 934 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=656, Invalid=2314, Unknown=0, NotChecked=0, Total=2970 [2023-04-02 15:00:01,721 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 117 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:00:01,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 49 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 15:00:01,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-04-02 15:00:01,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 422. [2023-04-02 15:00:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 392 states have (on average 1.0331632653061225) internal successors, (405), 392 states have internal predecessors, (405), 26 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-02 15:00:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 456 transitions. [2023-04-02 15:00:01,991 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 456 transitions. Word has length 308 [2023-04-02 15:00:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:00:01,992 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 456 transitions. [2023-04-02 15:00:01,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 15:00:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 456 transitions. [2023-04-02 15:00:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2023-04-02 15:00:01,996 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:00:01,996 INFO L195 NwaCegarLoop]: trace histogram [230, 88, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:00:02,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-04-02 15:00:02,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 15:00:02,225 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:00:02,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:00:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash 476438080, now seen corresponding path program 13 times [2023-04-02 15:00:02,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:00:02,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262598841] [2023-04-02 15:00:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:00:02,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:00:02,335 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:00:02,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989326618] [2023-04-02 15:00:02,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:00:02,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:00:02,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:00:02,336 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:00:02,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 15:00:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:00:03,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 2861 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-02 15:00:03,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:00:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 31708 backedges. 8841 proven. 1081 refuted. 0 times theorem prover too weak. 21786 trivial. 0 not checked. [2023-04-02 15:00:04,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:00:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 31708 backedges. 8841 proven. 1081 refuted. 0 times theorem prover too weak. 21786 trivial. 0 not checked. [2023-04-02 15:00:05,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:00:05,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262598841] [2023-04-02 15:00:05,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:00:05,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989326618] [2023-04-02 15:00:05,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989326618] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:00:05,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019069296] [2023-04-02 15:00:05,876 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 15:00:05,876 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:00:05,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:00:05,877 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:00:05,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:00:05,892 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 15:00:06,202 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-02 15:00:06,207 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 15:00:06,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:00:06,212 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:00:06,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22177#(and (exists ((|v_main_~#A~0.offset_BEFORE_CALL_95| Int) (|v_main_~#B~0.offset_BEFORE_CALL_95| Int) (|v_main_~#B~0.base_BEFORE_CALL_95| Int) (|v_main_~#A~0.base_BEFORE_CALL_95| Int)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_95|) |v_main_~#B~0.offset_BEFORE_CALL_95|) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_95|) |v_main_~#A~0.offset_BEFORE_CALL_95|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:00:06,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:00:06,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:00:06,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2023-04-02 15:00:06,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525366770] [2023-04-02 15:00:06,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:00:06,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-04-02 15:00:06,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:00:06,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-04-02 15:00:06,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4725, Invalid=8615, Unknown=0, NotChecked=0, Total=13340 [2023-04-02 15:00:06,645 INFO L87 Difference]: Start difference. First operand 422 states and 456 transitions. Second operand has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 98 states have internal predecessors, (115), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 15:00:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:00:15,112 INFO L93 Difference]: Finished difference Result 1893 states and 2704 transitions. [2023-04-02 15:00:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-02 15:00:15,113 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 98 states have internal predecessors, (115), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 356 [2023-04-02 15:00:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:00:15,121 INFO L225 Difference]: With dead ends: 1893 [2023-04-02 15:00:15,121 INFO L226 Difference]: Without dead ends: 1529 [2023-04-02 15:00:15,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1114 GetRequests, 953 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8344 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9331, Invalid=17075, Unknown=0, NotChecked=0, Total=26406 [2023-04-02 15:00:15,126 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1402 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 1236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1236 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:00:15,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1450 Valid, 89 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1236 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 15:00:15,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2023-04-02 15:00:15,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 662. [2023-04-02 15:00:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 632 states have (on average 1.0205696202531647) internal successors, (645), 632 states have internal predecessors, (645), 26 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-02 15:00:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 696 transitions. [2023-04-02 15:00:15,514 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 696 transitions. Word has length 356 [2023-04-02 15:00:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:00:15,514 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 696 transitions. [2023-04-02 15:00:15,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 98 states have internal predecessors, (115), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 15:00:15,514 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 696 transitions. [2023-04-02 15:00:15,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2023-04-02 15:00:15,518 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:00:15,519 INFO L195 NwaCegarLoop]: trace histogram [470, 88, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:00:15,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-02 15:00:15,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 15:00:15,732 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:00:15,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:00:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1682538304, now seen corresponding path program 14 times [2023-04-02 15:00:15,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:00:15,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793061658] [2023-04-02 15:00:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:00:15,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:00:15,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:00:15,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771725742] [2023-04-02 15:00:15,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:00:15,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:00:15,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:00:15,900 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:00:15,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process