/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 IntervalDomain -i ../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:52:13,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:52:13,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:52:13,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:52:13,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:52:13,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:52:13,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:52:13,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:52:13,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:52:13,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:52:13,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:52:13,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:52:13,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:52:13,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:52:13,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:52:13,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:52:13,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:52:13,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:52:13,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:52:13,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:52:13,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:52:13,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:52:13,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:52:13,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:52:13,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:52:13,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:52:13,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:52:13,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:52:13,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:52:13,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:52:13,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:52:13,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:52:13,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:52:13,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:52:13,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:52:13,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:52:13,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:52:13,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:52:13,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:52:13,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:52:13,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:52:13,810 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 [2023-03-31 20:52:13,839 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:52:13,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:52:13,840 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:52:13,840 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:52:13,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:52:13,841 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:52:13,841 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:52:13,841 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:52:13,841 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:52:13,841 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:52:13,842 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:52:13,842 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:52:13,842 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:52:13,842 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:52:13,843 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:52:13,843 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:52:13,843 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:52:13,843 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:52:13,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:52:13,844 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:52:13,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:52:13,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:52:13,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:52:13,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:52:13,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:52:13,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:52:13,845 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:52:13,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:52:13,845 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:52:13,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:52:13,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:52:13,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:52:13,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:52:13,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:52:13,846 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:52:13,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:52:13,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:52:13,846 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:52:13,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:52:13,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:52:13,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:52:13,847 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:52:14,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:52:14,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:52:14,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:52:14,122 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:52:14,123 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:52:14,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2023-03-31 20:52:15,327 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:52:15,495 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:52:15,496 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2023-03-31 20:52:15,501 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dda30d51/8b977db617374d9da21dd7f7cd1d6cf8/FLAGbd4dd24b3 [2023-03-31 20:52:15,513 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dda30d51/8b977db617374d9da21dd7f7cd1d6cf8 [2023-03-31 20:52:15,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:52:15,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:52:15,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:52:15,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:52:15,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:52:15,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:52:15" (1/1) ... [2023-03-31 20:52:15,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d3ed40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:52:15, skipping insertion in model container [2023-03-31 20:52:15,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:52:15" (1/1) ... [2023-03-31 20:52:15,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:52:15,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:52:15,713 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/diff-2-n-u.c[322,335] [2023-03-31 20:52:15,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:52:15,762 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:52:15,774 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/diff-2-n-u.c[322,335] [2023-03-31 20:52:15,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:52:15,815 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:52:15,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:52:15 WrapperNode [2023-03-31 20:52:15,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:52:15,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:52:15,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:52:15,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:52:15,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:52:15" (1/1) ... [2023-03-31 20:52:15,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:52:15" (1/1) ... [2023-03-31 20:52:15,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:52:15" (1/1) ... [2023-03-31 20:52:15,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:52:15" (1/1) ... [2023-03-31 20:52:15,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:52:15" (1/1) ... [2023-03-31 20:52:15,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:52:15" (1/1) ... [2023-03-31 20:52:15,863 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:52:15" (1/1) ... [2023-03-31 20:52:15,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:52:15" (1/1) ... [2023-03-31 20:52:15,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:52:15,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:52:15,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:52:15,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:52:15,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:52:15" (1/1) ... [2023-03-31 20:52:15,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:52:15,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:52:15,905 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) [2023-03-31 20:52:15,920 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 [2023-03-31 20:52:15,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:52:15,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:52:15,937 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:52:15,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:52:15,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:52:15,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:52:15,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:52:15,938 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:52:15,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:52:15,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:52:15,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 20:52:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:52:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:52:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:52:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:52:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:52:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:52:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:52:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:52:16,000 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:52:16,002 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:52:16,262 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:52:16,290 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:52:16,290 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-03-31 20:52:16,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:52:16 BoogieIcfgContainer [2023-03-31 20:52:16,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:52:16,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:52:16,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:52:16,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:52:16,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:52:15" (1/3) ... [2023-03-31 20:52:16,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cb636e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:52:16, skipping insertion in model container [2023-03-31 20:52:16,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:52:15" (2/3) ... [2023-03-31 20:52:16,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cb636e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:52:16, skipping insertion in model container [2023-03-31 20:52:16,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:52:16" (3/3) ... [2023-03-31 20:52:16,299 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2023-03-31 20:52:16,313 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:52:16,314 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:52:16,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:52:16,356 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;@4ad3ab1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:52:16,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:52:16,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:52:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 20:52:16,367 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:52:16,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:52:16,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:52:16,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:52:16,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1034139866, now seen corresponding path program 1 times [2023-03-31 20:52:16,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:52:16,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864491718] [2023-03-31 20:52:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:52:16,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:52:16,505 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:52:16,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36374262] [2023-03-31 20:52:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:52:16,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:52:16,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:52:16,509 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) [2023-03-31 20:52:16,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:52:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:52:16,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:52:16,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:52:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:52:16,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:52:16,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:52:16,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864491718] [2023-03-31 20:52:16,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:52:16,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36374262] [2023-03-31 20:52:16,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36374262] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:52:16,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:52:16,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:52:16,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697877510] [2023-03-31 20:52:16,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:52:16,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:52:16,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:52:16,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:52:16,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:52:16,744 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:52:16,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:52:16,832 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2023-03-31 20:52:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:52:16,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-03-31 20:52:16,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:52:16,840 INFO L225 Difference]: With dead ends: 43 [2023-03-31 20:52:16,840 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 20:52:16,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:52:16,846 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:52:16,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:52:16,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 20:52:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-03-31 20:52:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:52:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2023-03-31 20:52:16,878 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 14 [2023-03-31 20:52:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:52:16,878 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2023-03-31 20:52:16,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:52:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2023-03-31 20:52:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 20:52:16,879 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:52:16,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:52:16,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:52:17,080 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 [2023-03-31 20:52:17,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:52:17,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:52:17,082 INFO L85 PathProgramCache]: Analyzing trace with hash -701283687, now seen corresponding path program 1 times [2023-03-31 20:52:17,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:52:17,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030427497] [2023-03-31 20:52:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:52:17,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:52:17,100 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:52:17,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717184287] [2023-03-31 20:52:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:52:17,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:52:17,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:52:17,114 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) [2023-03-31 20:52:17,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:52:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:52:17,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:52:17,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:52:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:52:17,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:52:17,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:52:17,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030427497] [2023-03-31 20:52:17,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:52:17,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717184287] [2023-03-31 20:52:17,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717184287] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:52:17,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:52:17,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 20:52:17,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788082680] [2023-03-31 20:52:17,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:52:17,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 20:52:17,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:52:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 20:52:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:52:17,255 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:52:17,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:52:17,329 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2023-03-31 20:52:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 20:52:17,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-03-31 20:52:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:52:17,332 INFO L225 Difference]: With dead ends: 47 [2023-03-31 20:52:17,332 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 20:52:17,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:52:17,336 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:52:17,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:52:17,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 20:52:17,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2023-03-31 20:52:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:52:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-03-31 20:52:17,344 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2023-03-31 20:52:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:52:17,344 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-03-31 20:52:17,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:52:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-03-31 20:52:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 20:52:17,345 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:52:17,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:52:17,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 20:52:17,549 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 [2023-03-31 20:52:17,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:52:17,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:52:17,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1221593451, now seen corresponding path program 1 times [2023-03-31 20:52:17,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:52:17,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514583464] [2023-03-31 20:52:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:52:17,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:52:17,565 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:52:17,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376844277] [2023-03-31 20:52:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:52:17,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:52:17,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:52:17,567 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) [2023-03-31 20:52:17,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:52:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:52:17,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:52:17,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:52:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:52:17,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:52:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:52:17,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:52:17,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514583464] [2023-03-31 20:52:17,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:52:17,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376844277] [2023-03-31 20:52:17,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376844277] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:52:17,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1420455982] [2023-03-31 20:52:17,716 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:52:17,716 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:52:17,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:52:17,723 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:52:17,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:52:17,785 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:52:17,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:52:17,984 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:52:18,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1420455982] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:52:18,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:52:18,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 5] total 15 [2023-03-31 20:52:18,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964615817] [2023-03-31 20:52:18,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:52:18,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 20:52:18,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:52:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 20:52:18,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-03-31 20:52:18,175 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 9 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:52:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:52:18,694 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2023-03-31 20:52:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 20:52:18,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-03-31 20:52:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:52:18,696 INFO L225 Difference]: With dead ends: 49 [2023-03-31 20:52:18,696 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 20:52:18,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2023-03-31 20:52:18,697 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:52:18,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 7 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:52:18,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 20:52:18,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-03-31 20:52:18,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:52:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-03-31 20:52:18,711 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2023-03-31 20:52:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:52:18,712 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-03-31 20:52:18,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:52:18,712 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-03-31 20:52:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 20:52:18,713 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:52:18,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:52:18,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 20:52:18,918 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 [2023-03-31 20:52:18,918 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:52:18,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:52:18,919 INFO L85 PathProgramCache]: Analyzing trace with hash -924927667, now seen corresponding path program 1 times [2023-03-31 20:52:18,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:52:18,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899656454] [2023-03-31 20:52:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:52:18,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:52:18,933 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:52:18,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093005170] [2023-03-31 20:52:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:52:18,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:52:18,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:52:18,936 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) [2023-03-31 20:52:18,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:52:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:52:19,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:52:19,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:52:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:52:19,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:52:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:52:19,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:52:19,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899656454] [2023-03-31 20:52:19,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:52:19,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093005170] [2023-03-31 20:52:19,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093005170] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:52:19,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [517704343] [2023-03-31 20:52:19,061 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-03-31 20:52:19,061 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:52:19,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:52:19,062 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:52:19,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:52:19,086 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:52:19,442 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-03-31 20:52:19,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:52:19,482 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:52:20,098 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '751#(and (exists ((|v_main_~#C~0.base_BEFORE_CALL_1| Int) (|v_main_~#A~0.base_BEFORE_CALL_1| Int) (|v_main_~#B~0.base_BEFORE_CALL_1| Int)) (and (<= 0 |v_main_~#C~0.base_BEFORE_CALL_1|) (<= 0 |v_main_~#A~0.base_BEFORE_CALL_1|) (not (= (mod (+ (* (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_1|) 0) 4294967295) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) 0)) 4294967296) (mod (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_1|) 0) 4294967296))) (<= 0 |v_main_~#B~0.base_BEFORE_CALL_1|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:52:20,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:52:20,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:52:20,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-03-31 20:52:20,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943913984] [2023-03-31 20:52:20,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:52:20,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 20:52:20,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:52:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 20:52:20,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-03-31 20:52:20,100 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:52:20,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:52:20,231 INFO L93 Difference]: Finished difference Result 69 states and 98 transitions. [2023-03-31 20:52:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 20:52:20,232 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-03-31 20:52:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:52:20,233 INFO L225 Difference]: With dead ends: 69 [2023-03-31 20:52:20,233 INFO L226 Difference]: Without dead ends: 47 [2023-03-31 20:52:20,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2023-03-31 20:52:20,236 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:52:20,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 33 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:52:20,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-03-31 20:52:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-03-31 20:52:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:52:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-03-31 20:52:20,264 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 23 [2023-03-31 20:52:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:52:20,264 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-03-31 20:52:20,264 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:52:20,264 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-03-31 20:52:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 20:52:20,265 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:52:20,265 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:52:20,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:52:20,470 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 [2023-03-31 20:52:20,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:52:20,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:52:20,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1905953871, now seen corresponding path program 2 times [2023-03-31 20:52:20,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:52:20,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394492152] [2023-03-31 20:52:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:52:20,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:52:20,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:52:20,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094265890] [2023-03-31 20:52:20,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:52:20,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:52:20,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:52:20,492 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) [2023-03-31 20:52:20,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:52:20,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:52:20,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:52:20,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:52:20,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:52:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-03-31 20:52:20,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:52:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-03-31 20:52:20,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:52:20,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394492152] [2023-03-31 20:52:20,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:52:20,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094265890] [2023-03-31 20:52:20,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094265890] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:52:20,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1444205272] [2023-03-31 20:52:20,661 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-03-31 20:52:20,661 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:52:20,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:52:20,662 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:52:20,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:52:20,682 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:52:20,927 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-03-31 20:52:20,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:52:20,946 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:52:21,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1167#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#C~0.base_BEFORE_CALL_2| Int) (|v_main_~#B~0.base_BEFORE_CALL_2| Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (and (<= 0 |v_main_~#C~0.base_BEFORE_CALL_2|) (not (= (mod (+ (* (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) 0) 4294967295) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) 0)) 4294967296) (mod (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_2|) 0) 4294967296))) (<= 0 |v_main_~#A~0.base_BEFORE_CALL_2|) (<= 0 |v_main_~#B~0.base_BEFORE_CALL_2|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:52:21,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:52:21,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:52:21,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-03-31 20:52:21,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371964724] [2023-03-31 20:52:21,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:52:21,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 20:52:21,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:52:21,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 20:52:21,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-03-31 20:52:21,601 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:52:21,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:52:21,804 INFO L93 Difference]: Finished difference Result 177 states and 228 transitions. [2023-03-31 20:52:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 20:52:21,804 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-03-31 20:52:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:52:21,809 INFO L225 Difference]: With dead ends: 177 [2023-03-31 20:52:21,809 INFO L226 Difference]: Without dead ends: 143 [2023-03-31 20:52:21,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2023-03-31 20:52:21,810 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:52:21,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 51 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:52:21,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-03-31 20:52:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 100. [2023-03-31 20:52:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 91 states have internal predecessors, (108), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:52:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2023-03-31 20:52:21,868 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 32 [2023-03-31 20:52:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:52:21,868 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2023-03-31 20:52:21,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:52:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2023-03-31 20:52:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-03-31 20:52:21,872 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:52:21,872 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:52:21,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 20:52:22,078 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 [2023-03-31 20:52:22,078 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:52:22,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:52:22,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1853502766, now seen corresponding path program 3 times [2023-03-31 20:52:22,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:52:22,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965542555] [2023-03-31 20:52:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:52:22,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:52:22,122 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:52:22,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67496915] [2023-03-31 20:52:22,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:52:22,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:52:22,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:52:22,124 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) [2023-03-31 20:52:22,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process