/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-patterns/array30_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:11:32,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:11:32,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:11:32,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:11:32,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:11:32,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:11:32,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:11:32,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:11:32,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:11:32,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:11:32,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:11:32,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:11:32,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:11:32,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:11:32,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:11:32,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:11:32,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:11:32,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:11:32,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:11:32,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:11:32,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:11:32,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:11:32,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:11:32,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:11:32,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:11:32,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:11:32,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:11:32,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:11:32,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:11:32,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:11:32,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:11:32,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:11:32,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:11:32,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:11:32,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:11:32,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:11:32,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:11:32,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:11:32,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:11:32,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:11:32,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:11:32,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 15:11:33,018 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:11:33,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:11:33,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:11:33,019 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:11:33,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:11:33,020 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:11:33,020 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:11:33,020 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:11:33,020 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:11:33,020 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:11:33,021 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:11:33,021 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:11:33,021 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:11:33,021 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:11:33,022 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:11:33,022 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:11:33,022 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:11:33,022 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:11:33,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:11:33,023 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:11:33,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:11:33,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:11:33,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:11:33,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:11:33,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:11:33,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:11:33,024 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:11:33,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:11:33,024 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:11:33,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:11:33,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:11:33,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:11:33,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:11:33,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:11:33,025 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:11:33,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:11:33,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:11:33,025 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:11:33,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:11:33,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:11:33,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:11:33,026 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:11:33,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:11:33,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:11:33,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:11:33,256 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:11:33,257 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:11:33,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array30_pattern.c [2023-04-02 15:11:34,359 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:11:34,517 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:11:34,518 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array30_pattern.c [2023-04-02 15:11:34,523 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/592f98ef5/108f0c59fdcd4be09023baba4fa124ca/FLAG73bb0c422 [2023-04-02 15:11:34,536 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/592f98ef5/108f0c59fdcd4be09023baba4fa124ca [2023-04-02 15:11:34,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:11:34,540 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:11:34,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:11:34,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:11:34,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:11:34,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:11:34" (1/1) ... [2023-04-02 15:11:34,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bce5ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:34, skipping insertion in model container [2023-04-02 15:11:34,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:11:34" (1/1) ... [2023-04-02 15:11:34,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:11:34,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:11:34,678 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array30_pattern.c[1189,1202] [2023-04-02 15:11:34,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:11:34,699 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:11:34,707 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array30_pattern.c[1189,1202] [2023-04-02 15:11:34,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:11:34,724 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:11:34,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:34 WrapperNode [2023-04-02 15:11:34,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:11:34,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:11:34,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:11:34,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:11:34,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:34" (1/1) ... [2023-04-02 15:11:34,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:34" (1/1) ... [2023-04-02 15:11:34,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:34" (1/1) ... [2023-04-02 15:11:34,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:34" (1/1) ... [2023-04-02 15:11:34,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:34" (1/1) ... [2023-04-02 15:11:34,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:34" (1/1) ... [2023-04-02 15:11:34,747 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:34" (1/1) ... [2023-04-02 15:11:34,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:34" (1/1) ... [2023-04-02 15:11:34,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:11:34,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:11:34,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:11:34,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:11:34,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:34" (1/1) ... [2023-04-02 15:11:34,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:11:34,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:11:34,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 15:11:34,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 15:11:34,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:11:34,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:11:34,828 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:11:34,829 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 15:11:34,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:11:34,829 INFO L138 BoogieDeclarations]: Found implementation of procedure diff [2023-04-02 15:11:34,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:11:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:11:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:11:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:11:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:11:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 15:11:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:11:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 15:11:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-02 15:11:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure diff [2023-04-02 15:11:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:11:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 15:11:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:11:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:11:34,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:11:34,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:11:34,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:11:34,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:11:34,940 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:11:34,941 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:11:35,194 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:11:35,229 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:11:35,229 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-02 15:11:35,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:11:35 BoogieIcfgContainer [2023-04-02 15:11:35,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:11:35,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:11:35,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:11:35,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:11:35,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:11:34" (1/3) ... [2023-04-02 15:11:35,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1215cebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:11:35, skipping insertion in model container [2023-04-02 15:11:35,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:11:34" (2/3) ... [2023-04-02 15:11:35,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1215cebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:11:35, skipping insertion in model container [2023-04-02 15:11:35,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:11:35" (3/3) ... [2023-04-02 15:11:35,238 INFO L112 eAbstractionObserver]: Analyzing ICFG array30_pattern.c [2023-04-02 15:11:35,252 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:11:35,253 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:11:35,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:11:35,312 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;@5e9e48fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:11:35,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:11:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 15:11:35,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 15:11:35,323 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:11:35,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:11:35,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:11:35,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:11:35,330 INFO L85 PathProgramCache]: Analyzing trace with hash 159868606, now seen corresponding path program 1 times [2023-04-02 15:11:35,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:11:35,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051316675] [2023-04-02 15:11:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:11:35,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:11:35,414 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:11:35,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767098455] [2023-04-02 15:11:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:11:35,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:11:35,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:11:35,421 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:11:35,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 15:11:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:11:35,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 15:11:35,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:11:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:11:35,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:11:35,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:11:35,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051316675] [2023-04-02 15:11:35,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:11:35,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767098455] [2023-04-02 15:11:35,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767098455] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:11:35,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:11:35,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:11:35,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040065493] [2023-04-02 15:11:35,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:11:35,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:11:35,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:11:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:11:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:11:35,645 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:11:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:11:35,746 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2023-04-02 15:11:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 15:11:35,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-02 15:11:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:11:35,754 INFO L225 Difference]: With dead ends: 47 [2023-04-02 15:11:35,754 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 15:11:35,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:11:35,759 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:11:35,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:11:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 15:11:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-04-02 15:11:35,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 15:11:35,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-04-02 15:11:35,790 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2023-04-02 15:11:35,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:11:35,790 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-04-02 15:11:35,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:11:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-04-02 15:11:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 15:11:35,792 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:11:35,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:11:35,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 15:11:35,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 15:11:35,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:11:35,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:11:35,998 INFO L85 PathProgramCache]: Analyzing trace with hash 339469181, now seen corresponding path program 1 times [2023-04-02 15:11:35,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:11:35,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7141981] [2023-04-02 15:11:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:11:35,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:11:36,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:11:36,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497627499] [2023-04-02 15:11:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:11:36,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:11:36,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:11:36,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:11:36,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 15:11:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:11:36,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:11:36,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:11:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 15:11:36,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:11:36,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:11:36,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7141981] [2023-04-02 15:11:36,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:11:36,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497627499] [2023-04-02 15:11:36,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497627499] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:11:36,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:11:36,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 15:11:36,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458153083] [2023-04-02 15:11:36,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:11:36,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 15:11:36,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:11:36,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 15:11:36,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 15:11:36,123 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:11:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:11:36,164 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-04-02 15:11:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 15:11:36,165 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-04-02 15:11:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:11:36,166 INFO L225 Difference]: With dead ends: 42 [2023-04-02 15:11:36,166 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 15:11:36,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:11:36,167 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:11:36,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 33 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:11:36,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 15:11:36,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-04-02 15:11:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 15:11:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-04-02 15:11:36,174 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 19 [2023-04-02 15:11:36,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:11:36,174 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-04-02 15:11:36,175 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 15:11:36,175 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-04-02 15:11:36,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 15:11:36,175 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:11:36,175 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, 1, 1] [2023-04-02 15:11:36,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 15:11:36,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 15:11:36,381 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:11:36,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:11:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1258511460, now seen corresponding path program 1 times [2023-04-02 15:11:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:11:36,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157310699] [2023-04-02 15:11:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:11:36,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:11:36,399 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:11:36,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357135038] [2023-04-02 15:11:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:11:36,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:11:36,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:11:36,408 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:11:36,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 15:11:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:11:36,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-02 15:11:36,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:11:36,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 15:11:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:11:36,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:11:37,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-04-02 15:11:37,125 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 46 treesize of output 44 [2023-04-02 15:11:50,084 WARN L223 SmtUtils]: Spent 7.95s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:12:58,976 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse20 (* c_~ARR_SIZE~0 |c_diff_#in~idx1| 65535))) (let ((.cse4 (mod .cse20 65536)) (.cse19 (* 3 |c_diff_#res|)) (.cse3 (* 3 |c_diff_#in~idx1|)) (.cse1 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0))) (let ((.cse18 (+ .cse19 c_~ARR_SIZE~0 .cse3 (* 3 (div (+ .cse1 (* (- 1) c_~ARR_SIZE~0)) 3)))) (.cse2 (* 3 (div (+ c_~ARR_SIZE~0 (* (- 1) c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0)) 3))) (.cse21 (* 3 .cse4))) (let ((.cse0 (+ .cse21 .cse19 c_~ARR_SIZE~0)) (.cse5 (< 32767 |c_diff_#in~idx1|)) (.cse9 (+ .cse1 .cse2 .cse3)) (.cse6 (not (= (mod (+ c_~ARR_SIZE~0 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0 2)) 3) 0))) (.cse12 (= .cse18 (+ .cse21 .cse1))) (.cse13 (not (= (mod (+ .cse1 (* c_~ARR_SIZE~0 2)) 3) 0))) (.cse14 (< 32767 .cse4)) (.cse7 (* c_~ARR_SIZE~0 |c_diff_#in~idx1|)) (.cse8 (< |c_diff_#in~idx1| 0)) (.cse10 (not (= .cse4 |c_diff_#in~idx2|)))) (and (or (= .cse0 (+ .cse1 .cse2 196608 .cse3)) (<= .cse4 32767) .cse5 .cse6 (forall ((v_y_17 Int)) (< 1 (+ (* (* v_y_17 c_~ARR_SIZE~0) 65536) c_~ARR_SIZE~0 .cse7))) .cse8 (not (= (+ 65536 |c_diff_#in~idx2|) .cse4))) (or (= .cse0 .cse9) .cse5 .cse6 (<= |c_diff_#in~idx1| .cse4) (forall ((v_y_9 Int)) (< 1 (+ (* (* c_~ARR_SIZE~0 v_y_9) 65536) c_~ARR_SIZE~0 .cse7))) .cse10) (or (<= 0 |c_diff_#in~idx1|) (let ((.cse11 (* c_~ARR_SIZE~0 65537))) (and (or (forall ((v_y_3 Int)) (< 1 (+ .cse11 .cse7 (* 65536 (* c_~ARR_SIZE~0 v_y_3))))) .cse12 .cse13 .cse14 .cse10) (or (<= 0 |c_diff_#in~idx2|) (<= (+ 32769 |c_diff_#in~idx2|) 0) (let ((.cse17 (* 3 |c_diff_#in~idx2|)) (.cse15 (forall ((v_y_3 Int)) (< (+ |c_diff_#in~idx2| (* (div (+ (* (- 1) c_~ARR_SIZE~0 |c_diff_#in~idx1|) (* (- 1) |c_diff_#in~idx2|)) 65536) 65536) 1) (+ .cse11 (* 65536 (* c_~ARR_SIZE~0 v_y_3)))))) (.cse16 (not (= (mod (+ .cse20 (* |c_diff_#in~idx2| 65535)) 65536) 0)))) (and (or (< |c_diff_#in~idx2| |c_diff_#in~idx1|) .cse13 .cse15 .cse16 (= (+ .cse1 .cse17) .cse18)) (or (= .cse9 (+ .cse19 c_~ARR_SIZE~0 .cse17)) (and (<= |c_diff_#in~idx1| |c_diff_#in~idx2|) (not (= (+ (* 6 |c_diff_#in~idx2|) c_~ARR_SIZE~0) (+ .cse1 .cse2 (* 6 |c_diff_#in~idx1|))))) .cse6 .cse15 .cse16)))))) (<= (+ 32769 |c_diff_#in~idx1|) 0)) (or .cse12 .cse13 .cse14 (< .cse4 |c_diff_#in~idx1|) (forall ((v_y_12 Int)) (< 1 (+ c_~ARR_SIZE~0 (* 65536 (* v_y_12 c_~ARR_SIZE~0)) .cse7))) .cse8 .cse10)))))) is different from false [2023-04-02 15:13:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:13:01,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:13:01,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157310699] [2023-04-02 15:13:01,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:13:01,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357135038] [2023-04-02 15:13:01,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357135038] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:13:01,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [589560399] [2023-04-02 15:13:01,432 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:13:01,432 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:13:01,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:13:01,442 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:13:01,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:13:01,504 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:13:02,352 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:13:02,358 INFO L197 IcfgInterpreter]: Interpreting procedure diff with input of size 89 for LOIs [2023-04-02 15:13:02,385 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:13:02,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:13:02,392 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:13:25,736 WARN L223 SmtUtils]: Spent 12.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:13:35,819 WARN L223 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:13:35,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '535#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:13:35,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:13:35,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:13:35,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2023-04-02 15:13:35,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726269632] [2023-04-02 15:13:35,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:13:35,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 15:13:35,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:13:35,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 15:13:35,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1793, Unknown=6, NotChecked=86, Total=2070 [2023-04-02 15:13:35,825 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 26 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 21 states have internal predecessors, (31), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 15:13:37,935 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse22 (* c_~ARR_SIZE~0 |c_diff_#in~idx1| 65535))) (let ((.cse4 (mod .cse22 65536)) (.cse20 (* 3 |c_diff_#res|)) (.cse3 (* 3 |c_diff_#in~idx1|)) (.cse1 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0))) (let ((.cse19 (+ .cse20 c_~ARR_SIZE~0 .cse3 (* 3 (div (+ .cse1 (* (- 1) c_~ARR_SIZE~0)) 3)))) (.cse2 (* 3 (div (+ c_~ARR_SIZE~0 (* (- 1) c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0)) 3))) (.cse23 (* 3 .cse4))) (let ((.cse0 (+ .cse23 .cse20 c_~ARR_SIZE~0)) (.cse5 (< 32767 |c_diff_#in~idx1|)) (.cse9 (+ .cse1 .cse2 .cse3)) (.cse6 (not (= (mod (+ c_~ARR_SIZE~0 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0 2)) 3) 0))) (.cse12 (= .cse19 (+ .cse23 .cse1))) (.cse13 (not (= (mod (+ .cse1 (* c_~ARR_SIZE~0 2)) 3) 0))) (.cse14 (< 32767 .cse4)) (.cse7 (* c_~ARR_SIZE~0 |c_diff_#in~idx1|)) (.cse8 (< |c_diff_#in~idx1| 0)) (.cse10 (not (= .cse4 |c_diff_#in~idx2|))) (.cse15 (< |c_diff_#in~idx2| |c_diff_#in~idx1|)) (.cse21 (<= |c_diff_#in~idx1| |c_diff_#in~idx2|))) (and (or (= .cse0 (+ .cse1 .cse2 196608 .cse3)) (<= .cse4 32767) .cse5 .cse6 (forall ((v_y_17 Int)) (< 1 (+ (* (* v_y_17 c_~ARR_SIZE~0) 65536) c_~ARR_SIZE~0 .cse7))) .cse8 (not (= (+ 65536 |c_diff_#in~idx2|) .cse4))) (or (= .cse0 .cse9) .cse5 .cse6 (<= |c_diff_#in~idx1| .cse4) (forall ((v_y_9 Int)) (< 1 (+ (* (* c_~ARR_SIZE~0 v_y_9) 65536) c_~ARR_SIZE~0 .cse7))) .cse10) (or (<= 0 |c_diff_#in~idx1|) (let ((.cse11 (* c_~ARR_SIZE~0 65537))) (and (or (forall ((v_y_3 Int)) (< 1 (+ .cse11 .cse7 (* 65536 (* c_~ARR_SIZE~0 v_y_3))))) .cse12 .cse13 .cse14 .cse10) (or (<= 0 |c_diff_#in~idx2|) (<= (+ 32769 |c_diff_#in~idx2|) 0) (let ((.cse18 (* 3 |c_diff_#in~idx2|)) (.cse16 (forall ((v_y_3 Int)) (< (+ |c_diff_#in~idx2| (* (div (+ (* (- 1) c_~ARR_SIZE~0 |c_diff_#in~idx1|) (* (- 1) |c_diff_#in~idx2|)) 65536) 65536) 1) (+ .cse11 (* 65536 (* c_~ARR_SIZE~0 v_y_3)))))) (.cse17 (not (= (mod (+ .cse22 (* |c_diff_#in~idx2| 65535)) 65536) 0)))) (and (or .cse15 .cse13 .cse16 .cse17 (= (+ .cse1 .cse18) .cse19)) (or (= .cse9 (+ .cse20 c_~ARR_SIZE~0 .cse18)) (and .cse21 (not (= (+ (* 6 |c_diff_#in~idx2|) c_~ARR_SIZE~0) (+ .cse1 .cse2 (* 6 |c_diff_#in~idx1|))))) .cse6 .cse16 .cse17)))))) (<= (+ 32769 |c_diff_#in~idx1|) 0)) (or .cse12 .cse13 .cse14 (< .cse4 |c_diff_#in~idx1|) (forall ((v_y_12 Int)) (< 1 (+ c_~ARR_SIZE~0 (* 65536 (* v_y_12 c_~ARR_SIZE~0)) .cse7))) .cse8 .cse10) (< 0 c_~ARR_SIZE~0) (or (and (= (+ |c_diff_#res| |c_diff_#in~idx2|) |c_diff_#in~idx1|) .cse15) (and .cse21 (= (+ |c_diff_#in~idx1| |c_diff_#res|) |c_diff_#in~idx2|)))))))) is different from false [2023-04-02 15:13:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:13:46,685 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2023-04-02 15:13:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 15:13:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 21 states have internal predecessors, (31), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2023-04-02 15:13:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:13:46,688 INFO L225 Difference]: With dead ends: 57 [2023-04-02 15:13:46,688 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 15:13:46,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 56.4s TimeCoverageRelationStatistics Valid=293, Invalid=2566, Unknown=11, NotChecked=210, Total=3080 [2023-04-02 15:13:46,690 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 15:13:46,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 92 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 288 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2023-04-02 15:13:46,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 15:13:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2023-04-02 15:13:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 15:13:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-04-02 15:13:46,704 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2023-04-02 15:13:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:13:46,704 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-04-02 15:13:46,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 21 states have internal predecessors, (31), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 15:13:46,704 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-04-02 15:13:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 15:13:46,705 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:13:46,706 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 15:13:46,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 15:13:46,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:13:46,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:13:46,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:13:46,910 INFO L85 PathProgramCache]: Analyzing trace with hash 200419114, now seen corresponding path program 2 times [2023-04-02 15:13:46,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:13:46,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29836787] [2023-04-02 15:13:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:13:46,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:13:46,921 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:13:46,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981685404] [2023-04-02 15:13:46,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:13:46,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:13:46,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:13:46,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:13:46,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 15:13:46,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 15:13:46,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:13:46,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 15:13:46,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:13:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:13:47,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:13:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:13:47,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:13:47,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29836787] [2023-04-02 15:13:47,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:13:47,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981685404] [2023-04-02 15:13:47,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981685404] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:13:47,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [16546185] [2023-04-02 15:13:47,060 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:13:47,060 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:13:47,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:13:47,061 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:13:47,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:13:47,079 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:13:47,727 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:13:47,733 INFO L197 IcfgInterpreter]: Interpreting procedure diff with input of size 89 for LOIs [2023-04-02 15:13:47,763 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:13:47,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:13:47,770 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:13:50,705 WARN L861 $PredicateComparison]: unable to prove that (or (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~sum~0_BEFORE_CALL_22 Int)) (not (= (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0) (+ c_~ARR_SIZE~0 (* 3 v_main_~sum~0_BEFORE_CALL_22)))))) (and (= (mod (+ c_~ARR_SIZE~0 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0 2)) 3) 0) (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2023-04-02 15:14:02,756 WARN L223 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:14:02,757 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '901#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:14:02,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:14:02,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:14:02,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-04-02 15:14:02,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472482946] [2023-04-02 15:14:02,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:14:02,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 15:14:02,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:14:02,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 15:14:02,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=778, Unknown=1, NotChecked=56, Total=930 [2023-04-02 15:14:02,758 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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 15:14:02,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:14:02,925 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2023-04-02 15:14:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 15:14:02,925 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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 26 [2023-04-02 15:14:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:14:02,926 INFO L225 Difference]: With dead ends: 68 [2023-04-02 15:14:02,926 INFO L226 Difference]: Without dead ends: 59 [2023-04-02 15:14:02,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=130, Invalid=995, Unknown=1, NotChecked=64, Total=1190 [2023-04-02 15:14:02,928 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:14:02,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 62 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:14:02,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-02 15:14:02,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2023-04-02 15:14:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 40 states have internal predecessors, (50), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 15:14:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2023-04-02 15:14:02,941 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 26 [2023-04-02 15:14:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:14:02,942 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2023-04-02 15:14:02,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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 15:14:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2023-04-02 15:14:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 15:14:02,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:14:02,943 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:14:02,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 15:14:03,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:14:03,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:14:03,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:14:03,146 INFO L85 PathProgramCache]: Analyzing trace with hash -522150119, now seen corresponding path program 3 times [2023-04-02 15:14:03,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:14:03,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436294984] [2023-04-02 15:14:03,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:14:03,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:14:03,159 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:14:03,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717280051] [2023-04-02 15:14:03,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:14:03,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:14:03,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:14:03,161 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:14:03,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 15:14:03,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:14:03,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:14:03,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 15:14:03,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:14:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:14:03,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:14:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:14:03,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:14:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436294984] [2023-04-02 15:14:03,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:14:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717280051] [2023-04-02 15:14:03,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717280051] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:14:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1173631820] [2023-04-02 15:14:03,270 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:14:03,270 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:14:03,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:14:03,270 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:14:03,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:14:03,288 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:14:03,933 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:14:03,938 INFO L197 IcfgInterpreter]: Interpreting procedure diff with input of size 89 for LOIs [2023-04-02 15:14:03,964 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:14:03,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:14:03,971 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:14:06,886 WARN L861 $PredicateComparison]: unable to prove that (or (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~sum~0_BEFORE_CALL_32 Int)) (not (= (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0) (+ (* 3 v_main_~sum~0_BEFORE_CALL_32) c_~ARR_SIZE~0))))) (and (= (mod (+ c_~ARR_SIZE~0 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0 2)) 3) 0) (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2023-04-02 15:14:20,929 WARN L223 SmtUtils]: Spent 14.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:14:20,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1327#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:14:20,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:14:20,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:14:20,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-02 15:14:20,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180275747] [2023-04-02 15:14:20,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:14:20,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 15:14:20,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:14:20,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 15:14:20,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=674, Unknown=1, NotChecked=52, Total=812 [2023-04-02 15:14:20,932 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 15:14:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:14:21,109 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2023-04-02 15:14:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 15:14:21,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-04-02 15:14:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:14:21,111 INFO L225 Difference]: With dead ends: 81 [2023-04-02 15:14:21,111 INFO L226 Difference]: Without dead ends: 61 [2023-04-02 15:14:21,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=121, Invalid=938, Unknown=1, NotChecked=62, Total=1122 [2023-04-02 15:14:21,112 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:14:21,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 68 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:14:21,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-02 15:14:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2023-04-02 15:14:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 44 states have internal predecessors, (53), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 15:14:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2023-04-02 15:14:21,125 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 29 [2023-04-02 15:14:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:14:21,125 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2023-04-02 15:14:21,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 15:14:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2023-04-02 15:14:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 15:14:21,126 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:14:21,126 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:14:21,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 15:14:21,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:14:21,327 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:14:21,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:14:21,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1851605839, now seen corresponding path program 4 times [2023-04-02 15:14:21,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:14:21,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977503157] [2023-04-02 15:14:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:14:21,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:14:21,338 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:14:21,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012289490] [2023-04-02 15:14:21,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:14:21,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:14:21,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:14:21,340 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:14:21,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 15:14:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:14:21,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 15:14:21,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:14:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:14:21,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:14:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:14:21,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:14:21,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977503157] [2023-04-02 15:14:21,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:14:21,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012289490] [2023-04-02 15:14:21,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012289490] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:14:21,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [728053004] [2023-04-02 15:14:21,479 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:14:21,479 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:14:21,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:14:21,480 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:14:21,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:14:21,499 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:14:22,046 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:14:22,053 INFO L197 IcfgInterpreter]: Interpreting procedure diff with input of size 89 for LOIs [2023-04-02 15:14:22,080 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:14:22,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:14:22,086 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:14:36,068 WARN L223 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:14:50,118 WARN L223 SmtUtils]: Spent 14.02s on a formula simplification. DAG size of input: 25 DAG size of output: 17 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:14:50,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1786#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:14:50,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:14:50,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:14:50,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-02 15:14:50,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236644283] [2023-04-02 15:14:50,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:14:50,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 15:14:50,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:14:50,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 15:14:50,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2023-04-02 15:14:50,120 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 15:14:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:14:50,251 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2023-04-02 15:14:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 15:14:50,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 29 [2023-04-02 15:14:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:14:50,253 INFO L225 Difference]: With dead ends: 91 [2023-04-02 15:14:50,253 INFO L226 Difference]: Without dead ends: 50 [2023-04-02 15:14:50,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 15:14:50,254 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:14:50,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 57 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:14:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-02 15:14:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2023-04-02 15:14:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 15:14:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2023-04-02 15:14:50,266 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 29 [2023-04-02 15:14:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:14:50,267 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2023-04-02 15:14:50,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 15:14:50,267 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2023-04-02 15:14:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 15:14:50,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:14:50,268 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:14:50,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 15:14:50,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:14:50,468 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:14:50,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:14:50,469 INFO L85 PathProgramCache]: Analyzing trace with hash -957708804, now seen corresponding path program 5 times [2023-04-02 15:14:50,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:14:50,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831210164] [2023-04-02 15:14:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:14:50,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:14:50,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:14:50,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126094736] [2023-04-02 15:14:50,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:14:50,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:14:50,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:14:50,493 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:14:50,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 15:14:50,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 15:14:50,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:14:50,698 WARN L260 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 118 conjunts are in the unsatisfiable core [2023-04-02 15:14:50,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:14:50,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 15:14:50,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-02 15:14:51,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:14:51,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:14:51,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:14:51,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-04-02 15:14:51,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:14:51,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:14:51,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:14:51,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:14:51,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:14:51,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-04-02 15:14:51,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:14:51,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:14:51,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:14:51,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:14:51,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:14:51,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:14:51,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 83 [2023-04-02 15:14:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:14:52,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:14:59,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:14:59,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831210164] [2023-04-02 15:14:59,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:14:59,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126094736] [2023-04-02 15:14:59,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126094736] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:14:59,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731883139] [2023-04-02 15:14:59,242 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:14:59,242 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:14:59,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:14:59,243 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:14:59,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:14:59,264 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:14:59,799 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:14:59,804 INFO L197 IcfgInterpreter]: Interpreting procedure diff with input of size 89 for LOIs [2023-04-02 15:14:59,821 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:14:59,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:14:59,825 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:15:04,375 WARN L861 $PredicateComparison]: unable to prove that (or (and (exists ((v_main_~sum~0_BEFORE_CALL_57 Int)) (not (= (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0) (+ c_~ARR_SIZE~0 (* 3 v_main_~sum~0_BEFORE_CALL_57))))) (= |c___VERIFIER_assert_#in~cond| 0)) (and (= (mod (+ c_~ARR_SIZE~0 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0 2)) 3) 0) (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2023-04-02 15:15:14,437 WARN L223 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:15:14,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2293#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:15:14,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:15:14,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 15:15:14,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2023-04-02 15:15:14,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950763797] [2023-04-02 15:15:14,438 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 15:15:14,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-02 15:15:14,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:15:14,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-02 15:15:14,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=4101, Unknown=1, NotChecked=132, Total=4692 [2023-04-02 15:15:14,441 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 26 states have internal predecessors, (33), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:15:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:15:15,166 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2023-04-02 15:15:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-02 15:15:15,167 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 26 states have internal predecessors, (33), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 47 [2023-04-02 15:15:15,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:15:15,168 INFO L225 Difference]: With dead ends: 117 [2023-04-02 15:15:15,168 INFO L226 Difference]: Without dead ends: 90 [2023-04-02 15:15:15,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=500, Invalid=4615, Unknown=1, NotChecked=140, Total=5256 [2023-04-02 15:15:15,170 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 15:15:15,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 65 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 15:15:15,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-04-02 15:15:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2023-04-02 15:15:15,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 55 states have internal predecessors, (63), 13 states have call successors, (13), 10 states have call predecessors, (13), 8 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 15:15:15,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2023-04-02 15:15:15,189 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 47 [2023-04-02 15:15:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:15:15,190 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2023-04-02 15:15:15,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 26 states have internal predecessors, (33), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:15:15,190 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2023-04-02 15:15:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 15:15:15,191 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:15:15,191 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:15:15,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 15:15:15,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:15,398 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:15:15,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:15:15,399 INFO L85 PathProgramCache]: Analyzing trace with hash -354923000, now seen corresponding path program 6 times [2023-04-02 15:15:15,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:15:15,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323829412] [2023-04-02 15:15:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:15,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:15:15,411 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:15:15,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53655976] [2023-04-02 15:15:15,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:15:15,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:15,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:15:15,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:15:15,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 15:15:15,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:15:15,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:15:15,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:15:15,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:15:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-02 15:15:15,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:15:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-02 15:15:15,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:15:15,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323829412] [2023-04-02 15:15:15,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:15:15,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53655976] [2023-04-02 15:15:15,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53655976] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:15:15,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1197736719] [2023-04-02 15:15:15,556 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:15:15,557 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:15:15,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:15:15,557 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:15:15,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:15:15,574 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:15:16,086 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:15:16,090 INFO L197 IcfgInterpreter]: Interpreting procedure diff with input of size 89 for LOIs [2023-04-02 15:15:16,107 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:15:16,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:15:16,114 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:15:18,971 WARN L861 $PredicateComparison]: unable to prove that (or (and (= (mod (+ c_~ARR_SIZE~0 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0 2)) 3) 0) (= |c___VERIFIER_assert_#in~cond| 1)) (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~sum~0_BEFORE_CALL_67 Int)) (not (= (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0) (+ c_~ARR_SIZE~0 (* 3 v_main_~sum~0_BEFORE_CALL_67))))))) is different from true [2023-04-02 15:15:29,013 WARN L223 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:15:29,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2952#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:15:29,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:15:29,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:15:29,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-02 15:15:29,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953340009] [2023-04-02 15:15:29,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:15:29,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 15:15:29,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:15:29,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 15:15:29,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=832, Unknown=1, NotChecked=58, Total=992 [2023-04-02 15:15:29,015 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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 15:15:29,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:15:29,246 INFO L93 Difference]: Finished difference Result 130 states and 157 transitions. [2023-04-02 15:15:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 15:15:29,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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 48 [2023-04-02 15:15:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:15:29,248 INFO L225 Difference]: With dead ends: 130 [2023-04-02 15:15:29,248 INFO L226 Difference]: Without dead ends: 106 [2023-04-02 15:15:29,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=161, Invalid=1248, Unknown=1, NotChecked=72, Total=1482 [2023-04-02 15:15:29,249 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:15:29,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 65 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:15:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-02 15:15:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2023-04-02 15:15:29,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 75 states have internal predecessors, (88), 16 states have call successors, (16), 11 states have call predecessors, (16), 9 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 15:15:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2023-04-02 15:15:29,274 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 48 [2023-04-02 15:15:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:15:29,275 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2023-04-02 15:15:29,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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 15:15:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2023-04-02 15:15:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 15:15:29,276 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:15:29,276 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:15:29,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 15:15:29,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 15:15:29,482 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:15:29,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:15:29,483 INFO L85 PathProgramCache]: Analyzing trace with hash 217067666, now seen corresponding path program 7 times [2023-04-02 15:15:29,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:15:29,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029679096] [2023-04-02 15:15:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:29,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:15:29,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:15:29,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091454662] [2023-04-02 15:15:29,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:15:29,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:29,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:15:29,493 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:15:29,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 15:15:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:15:29,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:15:29,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:15:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 15:15:29,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:15:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 31 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 15:15:29,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:15:29,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029679096] [2023-04-02 15:15:29,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:15:29,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091454662] [2023-04-02 15:15:29,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091454662] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:15:29,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [886683917] [2023-04-02 15:15:29,696 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:15:29,696 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:15:29,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:15:29,696 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:15:29,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:15:29,711 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:15:30,257 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:15:30,262 INFO L197 IcfgInterpreter]: Interpreting procedure diff with input of size 89 for LOIs [2023-04-02 15:15:30,278 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:15:30,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:15:30,284 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:15:33,185 WARN L861 $PredicateComparison]: unable to prove that (or (and (exists ((v_main_~sum~0_BEFORE_CALL_77 Int)) (not (= (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0) (+ (* 3 v_main_~sum~0_BEFORE_CALL_77) c_~ARR_SIZE~0)))) (= |c___VERIFIER_assert_#in~cond| 0)) (and (= (mod (+ c_~ARR_SIZE~0 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0 2)) 3) 0) (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2023-04-02 15:15:46,672 WARN L223 SmtUtils]: Spent 13.46s on a formula simplification. DAG size of input: 25 DAG size of output: 17 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:15:46,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3689#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:15:46,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:15:46,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:15:46,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-02 15:15:46,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750354587] [2023-04-02 15:15:46,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:15:46,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 15:15:46,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:15:46,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 15:15:46,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=833, Unknown=1, NotChecked=58, Total=992 [2023-04-02 15:15:46,675 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 15:15:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:15:46,857 INFO L93 Difference]: Finished difference Result 136 states and 161 transitions. [2023-04-02 15:15:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 15:15:46,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2023-04-02 15:15:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:15:46,859 INFO L225 Difference]: With dead ends: 136 [2023-04-02 15:15:46,859 INFO L226 Difference]: Without dead ends: 107 [2023-04-02 15:15:46,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=135, Invalid=1058, Unknown=1, NotChecked=66, Total=1260 [2023-04-02 15:15:46,860 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:15:46,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 66 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:15:46,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-02 15:15:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2023-04-02 15:15:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.144927536231884) internal successors, (79), 71 states have internal predecessors, (79), 16 states have call successors, (16), 11 states have call predecessors, (16), 9 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 15:15:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2023-04-02 15:15:46,882 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 48 [2023-04-02 15:15:46,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:15:46,882 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2023-04-02 15:15:46,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 15:15:46,882 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2023-04-02 15:15:46,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 15:15:46,883 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:15:46,883 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:15:46,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-02 15:15:47,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:47,089 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:15:47,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:15:47,090 INFO L85 PathProgramCache]: Analyzing trace with hash -387587865, now seen corresponding path program 8 times [2023-04-02 15:15:47,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:15:47,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39015316] [2023-04-02 15:15:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:15:47,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:15:47,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:15:47,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582134766] [2023-04-02 15:15:47,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:15:47,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:15:47,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:15:47,100 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:15:47,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 15:15:47,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 15:15:47,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:15:47,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:15:47,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:15:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-02 15:15:47,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:15:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-02 15:15:47,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:15:47,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39015316] [2023-04-02 15:15:47,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:15:47,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582134766] [2023-04-02 15:15:47,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582134766] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:15:47,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1658109429] [2023-04-02 15:15:47,856 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:15:47,856 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:15:47,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:15:47,857 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:15:47,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:15:47,877 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:15:48,380 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:15:48,386 INFO L197 IcfgInterpreter]: Interpreting procedure diff with input of size 89 for LOIs [2023-04-02 15:15:48,402 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:15:48,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:15:48,407 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:15:51,319 WARN L861 $PredicateComparison]: unable to prove that (or (and (exists ((v_main_~sum~0_BEFORE_CALL_87 Int)) (not (= (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0) (+ c_~ARR_SIZE~0 (* 3 v_main_~sum~0_BEFORE_CALL_87))))) (= |c___VERIFIER_assert_#in~cond| 0)) (and (= (mod (+ c_~ARR_SIZE~0 (* c_~ARR_SIZE~0 c_~ARR_SIZE~0 c_~ARR_SIZE~0 2)) 3) 0) (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2023-04-02 15:16:01,364 WARN L223 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:16:01,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4435#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:16:01,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:16:01,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:16:01,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-04-02 15:16:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166425490] [2023-04-02 15:16:01,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:16:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 15:16:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:16:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 15:16:01,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=774, Unknown=1, NotChecked=56, Total=930 [2023-04-02 15:16:01,366 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 15:16:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:16:01,523 INFO L93 Difference]: Finished difference Result 169 states and 202 transitions. [2023-04-02 15:16:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 15:16:01,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 51 [2023-04-02 15:16:01,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:16:01,525 INFO L225 Difference]: With dead ends: 169 [2023-04-02 15:16:01,525 INFO L226 Difference]: Without dead ends: 146 [2023-04-02 15:16:01,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=134, Invalid=991, Unknown=1, NotChecked=64, Total=1190 [2023-04-02 15:16:01,526 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:16:01,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 65 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:16:01,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-04-02 15:16:01,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2023-04-02 15:16:01,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 86 states have internal predecessors, (97), 19 states have call successors, (19), 11 states have call predecessors, (19), 9 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-02 15:16:01,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 133 transitions. [2023-04-02 15:16:01,553 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 133 transitions. Word has length 51 [2023-04-02 15:16:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:16:01,553 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 133 transitions. [2023-04-02 15:16:01,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 15:16:01,554 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 133 transitions. [2023-04-02 15:16:01,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-02 15:16:01,555 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:16:01,555 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:16:01,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 15:16:01,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 15:16:01,762 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:16:01,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:16:01,762 INFO L85 PathProgramCache]: Analyzing trace with hash 366387518, now seen corresponding path program 9 times [2023-04-02 15:16:01,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:16:01,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45622617] [2023-04-02 15:16:01,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:16:01,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:16:01,786 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:16:01,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224990850] [2023-04-02 15:16:01,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:16:01,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:16:01,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:16:01,789 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:16:01,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 15:16:01,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:16:01,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:16:01,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:16:01,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:16:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-02 15:16:01,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:16:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-02 15:16:02,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:16:02,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45622617] [2023-04-02 15:16:02,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:16:02,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224990850] [2023-04-02 15:16:02,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224990850] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:16:02,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1728084036] [2023-04-02 15:16:02,019 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 15:16:02,019 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:16:02,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:16:02,020 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:16:02,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:16:02,040 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:16:02,570 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2023-04-02 15:16:02,574 INFO L197 IcfgInterpreter]: Interpreting procedure diff with input of size 89 for LOIs [2023-04-02 15:16:02,591 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 23 for LOIs [2023-04-02 15:16:02,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:16:02,595 INFO L180 IcfgInterpreter]: Interpretation finished