/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-fpi/s32if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:04:38,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:04:38,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:04:38,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:04:38,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:04:38,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:04:38,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:04:38,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:04:38,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:04:38,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:04:38,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:04:38,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:04:38,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:04:38,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:04:38,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:04:38,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:04:38,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:04:38,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:04:38,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:04:38,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:04:38,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:04:38,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:04:38,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:04:38,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:04:38,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 03:04:38,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:04:38,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:04:38,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:04:38,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:04:38,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:04:38,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:04:38,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:04:38,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:04:38,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:04:38,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:04:38,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:04:38,935 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 [2023-04-01 03:04:38,968 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:04:38,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:04:38,969 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:04:38,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:04:38,970 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:04:38,970 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:04:38,970 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:04:38,970 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:04:38,970 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:04:38,970 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:04:38,971 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:04:38,971 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:04:38,971 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:04:38,971 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:04:38,971 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:04:38,971 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:04:38,971 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:04:38,972 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:04:38,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:04:38,972 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:04:38,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:04:38,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:04:38,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:04:38,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:04:38,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:04:38,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:04:38,974 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:04:38,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:04:38,974 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:04:38,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:04:38,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:04:38,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:04:38,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:04:38,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:04:38,975 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:04:38,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:04:38,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:04:38,975 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:04:38,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:04:38,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:04:38,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:04:38,976 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:04:39,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:04:39,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:04:39,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:04:39,288 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:04:39,289 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:04:39,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s32if.c [2023-04-01 03:04:40,812 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:04:41,051 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:04:41,052 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s32if.c [2023-04-01 03:04:41,058 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c65b760f/6295568211a44eb4a5a13f2e7420de46/FLAG3165698d3 [2023-04-01 03:04:41,075 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c65b760f/6295568211a44eb4a5a13f2e7420de46 [2023-04-01 03:04:41,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:04:41,081 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:04:41,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:04:41,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:04:41,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:04:41,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:04:41" (1/1) ... [2023-04-01 03:04:41,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ff9490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:41, skipping insertion in model container [2023-04-01 03:04:41,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:04:41" (1/1) ... [2023-04-01 03:04:41,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:04:41,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:04:41,241 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-fpi/s32if.c[588,601] [2023-04-01 03:04:41,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:04:41,269 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:04:41,281 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-fpi/s32if.c[588,601] [2023-04-01 03:04:41,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:04:41,302 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:04:41,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:41 WrapperNode [2023-04-01 03:04:41,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:04:41,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:04:41,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:04:41,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:04:41,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:41" (1/1) ... [2023-04-01 03:04:41,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:41" (1/1) ... [2023-04-01 03:04:41,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:41" (1/1) ... [2023-04-01 03:04:41,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:41" (1/1) ... [2023-04-01 03:04:41,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:41" (1/1) ... [2023-04-01 03:04:41,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:41" (1/1) ... [2023-04-01 03:04:41,349 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:41" (1/1) ... [2023-04-01 03:04:41,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:41" (1/1) ... [2023-04-01 03:04:41,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:04:41,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:04:41,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:04:41,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:04:41,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:41" (1/1) ... [2023-04-01 03:04:41,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:04:41,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:41,396 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) [2023-04-01 03:04:41,400 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 [2023-04-01 03:04:41,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:04:41,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:04:41,429 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:04:41,429 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 03:04:41,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 03:04:41,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:04:41,430 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:04:41,430 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:04:41,430 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:04:41,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:04:41,430 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 03:04:41,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 03:04:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:04:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 03:04:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:04:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 03:04:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 03:04:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:04:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:04:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:04:41,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:04:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:04:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:04:41,508 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:04:41,510 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:04:41,739 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:04:41,827 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:04:41,827 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 03:04:41,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:04:41 BoogieIcfgContainer [2023-04-01 03:04:41,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:04:41,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:04:41,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:04:41,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:04:41,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:04:41" (1/3) ... [2023-04-01 03:04:41,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6febdcad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:04:41, skipping insertion in model container [2023-04-01 03:04:41,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:41" (2/3) ... [2023-04-01 03:04:41,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6febdcad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:04:41, skipping insertion in model container [2023-04-01 03:04:41,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:04:41" (3/3) ... [2023-04-01 03:04:41,872 INFO L112 eAbstractionObserver]: Analyzing ICFG s32if.c [2023-04-01 03:04:41,891 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:04:41,891 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:04:41,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:04:41,954 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;@14d57d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:04:41,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:04:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:04:41,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 03:04:41,966 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:41,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:41,968 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:41,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:41,976 INFO L85 PathProgramCache]: Analyzing trace with hash 27340442, now seen corresponding path program 1 times [2023-04-01 03:04:41,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:41,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536655254] [2023-04-01 03:04:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:41,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:42,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:42,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536655254] [2023-04-01 03:04:42,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536655254] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:04:42,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:04:42,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 03:04:42,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355964337] [2023-04-01 03:04:42,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:04:42,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 03:04:42,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:42,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 03:04:42,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:04:42,461 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:42,547 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2023-04-01 03:04:42,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 03:04:42,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 03:04:42,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:42,558 INFO L225 Difference]: With dead ends: 46 [2023-04-01 03:04:42,558 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 03:04:42,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:04:42,564 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:42,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:04:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 03:04:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 03:04:42,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 03:04:42,600 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2023-04-01 03:04:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:42,600 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 03:04:42,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:42,601 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 03:04:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 03:04:42,601 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:42,602 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] [2023-04-01 03:04:42,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:04:42,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:42,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:42,603 INFO L85 PathProgramCache]: Analyzing trace with hash 933496895, now seen corresponding path program 1 times [2023-04-01 03:04:42,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:42,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929331135] [2023-04-01 03:04:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:42,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:42,633 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:42,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506782796] [2023-04-01 03:04:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:42,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:42,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:42,637 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) [2023-04-01 03:04:42,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 03:04:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:42,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-01 03:04:42,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:42,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 03:04:42,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-04-01 03:04:43,066 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 [2023-04-01 03:04:43,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 03:04:43,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 03:04:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:43,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:43,540 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 7 treesize of output 5 [2023-04-01 03:04:43,631 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 5 treesize of output 3 [2023-04-01 03:04:43,790 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:04:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:43,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:43,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929331135] [2023-04-01 03:04:43,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:43,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506782796] [2023-04-01 03:04:43,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506782796] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:43,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [610103622] [2023-04-01 03:04:43,941 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:04:43,941 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:43,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:43,952 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:43,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:44,069 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:44,519 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:04:44,555 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:44,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:44,572 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:45,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '273#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_1| Int)) (and (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_1|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (not (= (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_1|) 0))) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_1|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:45,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:45,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:45,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-04-01 03:04:45,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289499749] [2023-04-01 03:04:45,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:45,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 03:04:45,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:45,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 03:04:45,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 03:04:45,464 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:04:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:45,792 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-04-01 03:04:45,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 03:04:45,793 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2023-04-01 03:04:45,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:45,794 INFO L225 Difference]: With dead ends: 31 [2023-04-01 03:04:45,794 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 03:04:45,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 03:04:45,796 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:45,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 72 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:04:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 03:04:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-04-01 03:04:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 03:04:45,803 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2023-04-01 03:04:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:45,803 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 03:04:45,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:04:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 03:04:45,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 03:04:45,804 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:45,805 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] [2023-04-01 03:04:45,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:46,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:46,006 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:46,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1878810709, now seen corresponding path program 2 times [2023-04-01 03:04:46,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:46,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817299883] [2023-04-01 03:04:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:46,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:46,039 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:46,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496760563] [2023-04-01 03:04:46,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:04:46,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:46,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:46,052 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) [2023-04-01 03:04:46,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 03:04:46,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 03:04:46,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:04:46,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:04:46,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:04:46,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:04:46,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:46,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817299883] [2023-04-01 03:04:46,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:46,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496760563] [2023-04-01 03:04:46,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496760563] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:46,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [775796144] [2023-04-01 03:04:46,266 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:04:46,267 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:46,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:46,267 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:46,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:46,314 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:46,608 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:04:46,631 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:46,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:46,644 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:47,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '522#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (not (= (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_2|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_2|) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_2|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_2|)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_2|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:47,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:47,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:47,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 03:04:47,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575426749] [2023-04-01 03:04:47,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:47,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 03:04:47,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:47,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 03:04:47,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-01 03:04:47,217 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2023-04-01 03:04:47,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:47,329 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-04-01 03:04:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:04:47,331 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 21 [2023-04-01 03:04:47,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:47,331 INFO L225 Difference]: With dead ends: 35 [2023-04-01 03:04:47,331 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 03:04:47,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2023-04-01 03:04:47,334 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:47,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 55 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:04:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 03:04:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-04-01 03:04:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-04-01 03:04:47,342 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2023-04-01 03:04:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:47,342 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-04-01 03:04:47,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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) [2023-04-01 03:04:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-04-01 03:04:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 03:04:47,343 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:47,343 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] [2023-04-01 03:04:47,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:47,554 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,SelfDestructingSolverStorable2 [2023-04-01 03:04:47,554 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:47,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1166617831, now seen corresponding path program 3 times [2023-04-01 03:04:47,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:47,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084890288] [2023-04-01 03:04:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:47,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:47,571 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:47,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714423654] [2023-04-01 03:04:47,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:04:47,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:47,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:47,573 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) [2023-04-01 03:04:47,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 03:04:47,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:04:47,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:04:47,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:04:47,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:04:47,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:04:47,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:47,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084890288] [2023-04-01 03:04:47,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:47,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714423654] [2023-04-01 03:04:47,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714423654] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:47,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [957406636] [2023-04-01 03:04:47,699 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:04:47,699 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:47,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:47,700 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:47,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:47,743 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:47,935 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:04:47,955 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:47,959 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:47,967 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:48,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '774#(and (exists ((|v_main_~#sum~0.base_BEFORE_CALL_3| Int)) (and (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (not (= (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_3|) 0))) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_3|) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_3|))) (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:48,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:48,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:48,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-04-01 03:04:48,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139024603] [2023-04-01 03:04:48,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:48,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 03:04:48,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:48,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 03:04:48,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-04-01 03:04:48,547 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2023-04-01 03:04:48,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:48,620 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-04-01 03:04:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:04:48,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 21 [2023-04-01 03:04:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:48,621 INFO L225 Difference]: With dead ends: 37 [2023-04-01 03:04:48,621 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 03:04:48,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2023-04-01 03:04:48,623 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:48,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:04:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 03:04:48,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 03:04:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-01 03:04:48,630 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2023-04-01 03:04:48,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:48,630 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-01 03:04:48,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2023-04-01 03:04:48,630 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-01 03:04:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 03:04:48,631 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:48,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:48,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:48,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:48,838 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:48,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:48,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1565570042, now seen corresponding path program 4 times [2023-04-01 03:04:48,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:48,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919625797] [2023-04-01 03:04:48,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:48,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:48,876 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:48,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273582563] [2023-04-01 03:04:48,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:04:48,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:48,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:48,878 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) [2023-04-01 03:04:48,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 03:04:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:48,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 57 conjunts are in the unsatisfiable core [2023-04-01 03:04:48,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:48,973 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 [2023-04-01 03:04:48,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 03:04:48,997 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 [2023-04-01 03:04:49,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:04:49,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:04:49,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:04:49,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:04:49,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:04:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:49,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:49,462 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 7 treesize of output 5 [2023-04-01 03:04:49,545 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 9 treesize of output 7 [2023-04-01 03:04:49,670 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 5 treesize of output 3 [2023-04-01 03:04:49,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-04-01 03:04:49,771 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:04:49,772 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:04:49,774 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:04:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:50,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:50,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919625797] [2023-04-01 03:04:50,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:50,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273582563] [2023-04-01 03:04:50,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273582563] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:50,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877840735] [2023-04-01 03:04:50,231 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:04:50,231 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:50,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:50,232 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:50,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:50,274 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:50,517 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:04:50,535 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:50,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:50,547 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:51,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1058#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_4| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_4|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (not (= (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_4|) 0))) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_4|))) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:51,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:51,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:51,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-01 03:04:51,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515835620] [2023-04-01 03:04:51,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:51,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 03:04:51,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:51,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 03:04:51,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 03:04:51,497 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 26 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:51,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:51,944 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-04-01 03:04:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 03:04:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-04-01 03:04:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:51,949 INFO L225 Difference]: With dead ends: 36 [2023-04-01 03:04:51,949 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 03:04:51,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 03:04:51,951 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:51,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 120 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:04:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 03:04:51,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-04-01 03:04:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-01 03:04:51,965 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2023-04-01 03:04:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:51,965 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-01 03:04:51,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:51,965 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-01 03:04:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 03:04:51,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:51,967 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] [2023-04-01 03:04:51,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:52,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:52,175 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:52,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:52,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2036782350, now seen corresponding path program 5 times [2023-04-01 03:04:52,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:52,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023400854] [2023-04-01 03:04:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:52,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:52,210 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:52,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745951808] [2023-04-01 03:04:52,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:04:52,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:52,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:52,219 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) [2023-04-01 03:04:52,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 03:04:52,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 03:04:52,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:04:52,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:04:52,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:04:52,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:04:52,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:52,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023400854] [2023-04-01 03:04:52,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:52,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745951808] [2023-04-01 03:04:52,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745951808] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:52,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [559279340] [2023-04-01 03:04:52,530 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:04:52,530 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:52,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:52,531 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:52,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:52,575 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:52,817 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:04:52,835 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:52,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:52,847 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:53,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1342#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_5| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_5|) (not (= (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_5|) 0))) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_5|)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_5|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:53,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:53,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:53,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 03:04:53,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402129357] [2023-04-01 03:04:53,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:53,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 03:04:53,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:53,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 03:04:53,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-04-01 03:04:53,422 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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) [2023-04-01 03:04:53,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:53,571 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-04-01 03:04:53,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 03:04:53,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 24 [2023-04-01 03:04:53,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:53,572 INFO L225 Difference]: With dead ends: 41 [2023-04-01 03:04:53,573 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 03:04:53,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2023-04-01 03:04:53,574 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:53,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 47 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:04:53,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 03:04:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2023-04-01 03:04:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-04-01 03:04:53,581 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2023-04-01 03:04:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:53,581 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-04-01 03:04:53,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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) [2023-04-01 03:04:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-04-01 03:04:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 03:04:53,582 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:53,582 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] [2023-04-01 03:04:53,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:53,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:53,797 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:53,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:53,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1247780542, now seen corresponding path program 6 times [2023-04-01 03:04:53,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:53,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776420795] [2023-04-01 03:04:53,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:53,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:53,829 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:53,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037011961] [2023-04-01 03:04:53,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:04:53,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:53,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:53,831 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) [2023-04-01 03:04:53,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 03:04:53,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:04:53,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:04:53,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:04:53,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:04:53,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:04:54,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:54,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776420795] [2023-04-01 03:04:54,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:54,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037011961] [2023-04-01 03:04:54,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037011961] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:54,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1059954700] [2023-04-01 03:04:54,024 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:04:54,024 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:54,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:54,024 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:54,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:54,067 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:54,246 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:04:54,260 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:54,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:54,270 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:54,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1635#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_6| Int)) (and (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_6|)) (not (= (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_6|) 0))) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_6|) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_6|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_6|)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:54,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:54,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:54,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-04-01 03:04:54,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001699942] [2023-04-01 03:04:54,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:54,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 03:04:54,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:54,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 03:04:54,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2023-04-01 03:04:54,800 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 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) [2023-04-01 03:04:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:54,905 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-04-01 03:04:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 03:04:54,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 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 24 [2023-04-01 03:04:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:54,906 INFO L225 Difference]: With dead ends: 43 [2023-04-01 03:04:54,906 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 03:04:54,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2023-04-01 03:04:54,907 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:54,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:04:54,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 03:04:54,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 03:04:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:04:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 03:04:54,919 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2023-04-01 03:04:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:54,921 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 03:04:54,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 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) [2023-04-01 03:04:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 03:04:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 03:04:54,921 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:54,922 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:54,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 03:04:55,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:55,134 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:55,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:55,135 INFO L85 PathProgramCache]: Analyzing trace with hash -247409057, now seen corresponding path program 7 times [2023-04-01 03:04:55,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:55,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743806939] [2023-04-01 03:04:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:55,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:55,164 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:04:55,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004342033] [2023-04-01 03:04:55,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:04:55,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:55,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:55,165 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) [2023-04-01 03:04:55,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 03:04:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:55,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 77 conjunts are in the unsatisfiable core [2023-04-01 03:04:55,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:55,273 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 [2023-04-01 03:04:55,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 03:04:55,297 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 [2023-04-01 03:04:55,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:04:55,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 03:04:55,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 03:04:55,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 03:04:55,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 03:04:55,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 03:04:55,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 03:04:55,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 03:04:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:55,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:55,931 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 7 treesize of output 5 [2023-04-01 03:04:56,009 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 9 treesize of output 7 [2023-04-01 03:04:56,092 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 9 treesize of output 7 [2023-04-01 03:04:56,094 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:04:56,291 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 5 treesize of output 3 [2023-04-01 03:04:56,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:04:56,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2023-04-01 03:04:56,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:04:56,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2023-04-01 03:04:56,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-04-01 03:04:56,424 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:04:56,425 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:04:56,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:04:56,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 55 [2023-04-01 03:04:56,641 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:04:56,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 55 [2023-04-01 03:04:56,652 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 31 treesize of output 29 [2023-04-01 03:04:56,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:04:56,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2023-04-01 03:04:56,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-04-01 03:04:56,675 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:04:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:57,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:57,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743806939] [2023-04-01 03:04:57,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:04:57,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004342033] [2023-04-01 03:04:57,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004342033] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:57,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1521712727] [2023-04-01 03:04:57,747 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:04:57,747 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:57,747 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:57,747 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:57,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:57,772 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:58,001 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:04:58,015 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:58,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:58,027 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:59,032 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1963#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_7| Int)) (and (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_7|) (not (= (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_7|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_7|) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_7|)) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_7|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:59,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:59,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:04:59,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2023-04-01 03:04:59,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632920320] [2023-04-01 03:04:59,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:59,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 03:04:59,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:59,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 03:04:59,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 03:04:59,036 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 32 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:04:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:59,990 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2023-04-01 03:04:59,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 03:04:59,991 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-04-01 03:04:59,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:59,993 INFO L225 Difference]: With dead ends: 41 [2023-04-01 03:04:59,993 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 03:04:59,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=141, Invalid=2115, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 03:04:59,994 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:59,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 208 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 03:04:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 03:05:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-04-01 03:05:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-04-01 03:05:00,005 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2023-04-01 03:05:00,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:00,005 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-04-01 03:05:00,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-04-01 03:05:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 03:05:00,006 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:00,006 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:00,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 03:05:00,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:00,209 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:00,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:00,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1685335243, now seen corresponding path program 8 times [2023-04-01 03:05:00,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:00,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038724824] [2023-04-01 03:05:00,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:00,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:00,244 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:00,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86720723] [2023-04-01 03:05:00,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:05:00,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:00,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:00,245 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) [2023-04-01 03:05:00,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 03:05:00,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 03:05:00,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:05:00,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 03:05:00,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 03:05:00,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 03:05:00,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:00,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038724824] [2023-04-01 03:05:00,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:00,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86720723] [2023-04-01 03:05:00,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86720723] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:00,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1442120281] [2023-04-01 03:05:00,536 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:05:00,536 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:00,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:00,537 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:00,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:00,559 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:00,728 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:00,763 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:00,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:00,773 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:01,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2286#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_8| Int)) (and (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_8|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_8|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_8|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_8| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_8|) (not (= (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_8|) 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:01,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:01,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:01,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-04-01 03:05:01,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674722708] [2023-04-01 03:05:01,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:01,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 03:05:01,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:01,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 03:05:01,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-04-01 03:05:01,257 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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) [2023-04-01 03:05:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:01,432 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-04-01 03:05:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 03:05:01,434 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 27 [2023-04-01 03:05:01,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:01,434 INFO L225 Difference]: With dead ends: 47 [2023-04-01 03:05:01,434 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 03:05:01,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 03:05:01,436 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:01,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 66 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:05:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 03:05:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2023-04-01 03:05:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 03:05:01,446 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 27 [2023-04-01 03:05:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:01,446 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 03:05:01,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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) [2023-04-01 03:05:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 03:05:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 03:05:01,446 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:01,447 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:01,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 03:05:01,649 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,SelfDestructingSolverStorable8 [2023-04-01 03:05:01,649 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:01,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:01,649 INFO L85 PathProgramCache]: Analyzing trace with hash 880003321, now seen corresponding path program 9 times [2023-04-01 03:05:01,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:01,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359311253] [2023-04-01 03:05:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:01,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:01,669 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:01,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685918082] [2023-04-01 03:05:01,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:05:01,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:01,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:01,670 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) [2023-04-01 03:05:01,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 03:05:01,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:05:01,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:05:01,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 03:05:01,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 03:05:01,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 03:05:01,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:01,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359311253] [2023-04-01 03:05:01,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:01,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685918082] [2023-04-01 03:05:01,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685918082] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:01,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114688335] [2023-04-01 03:05:01,878 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:05:01,879 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:01,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:01,880 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:01,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:01,904 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:02,088 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:02,103 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:02,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:02,113 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:02,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2620#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_9| Int)) (and (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_9|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_9|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_9|) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_9| |#StackHeapBarrier|)) (not (= (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_9|) 0))) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_9|)))))' at error location [2023-04-01 03:05:02,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:02,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:02,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-04-01 03:05:02,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247773075] [2023-04-01 03:05:02,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:02,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 03:05:02,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:02,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 03:05:02,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2023-04-01 03:05:02,630 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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) [2023-04-01 03:05:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:02,771 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-04-01 03:05:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 03:05:02,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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 27 [2023-04-01 03:05:02,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:02,773 INFO L225 Difference]: With dead ends: 49 [2023-04-01 03:05:02,773 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 03:05:02,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2023-04-01 03:05:02,774 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:02,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:05:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 03:05:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 03:05:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-01 03:05:02,797 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2023-04-01 03:05:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:02,798 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-01 03:05:02,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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) [2023-04-01 03:05:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-01 03:05:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 03:05:02,805 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:02,805 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:02,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 03:05:03,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 03:05:03,013 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:03,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:03,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1469468326, now seen corresponding path program 10 times [2023-04-01 03:05:03,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:03,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820166811] [2023-04-01 03:05:03,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:03,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:03,040 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:03,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250381760] [2023-04-01 03:05:03,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:05:03,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:03,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:03,041 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) [2023-04-01 03:05:03,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 03:05:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:05:03,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 97 conjunts are in the unsatisfiable core [2023-04-01 03:05:03,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:03,162 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 [2023-04-01 03:05:03,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 03:05:03,184 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 [2023-04-01 03:05:03,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:05:03,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 03:05:03,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 03:05:03,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:05:03,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:05:03,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:05:03,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:05:03,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:05:03,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:05:03,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:05:03,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 03:05:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:03,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:03,985 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 7 treesize of output 5 [2023-04-01 03:05:04,043 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 9 treesize of output 7 [2023-04-01 03:05:04,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:04,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:05:04,145 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 9 treesize of output 7 [2023-04-01 03:05:04,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:04,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:05:04,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:04,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:05:04,241 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 9 treesize of output 7 [2023-04-01 03:05:04,474 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 5 treesize of output 3 [2023-04-01 03:05:04,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:04,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2023-04-01 03:05:04,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:04,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2023-04-01 03:05:04,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:04,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2023-04-01 03:05:04,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-04-01 03:05:04,730 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:04,731 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:05,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:05,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 55 [2023-04-01 03:05:05,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:05,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 55 [2023-04-01 03:05:05,217 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 31 treesize of output 29 [2023-04-01 03:05:05,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:05,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2023-04-01 03:05:05,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-04-01 03:05:05,250 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:05,252 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:05,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:05,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 66 [2023-04-01 03:05:05,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:05,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 48 [2023-04-01 03:05:05,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:05,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 66 [2023-04-01 03:05:05,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-04-01 03:05:05,829 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:05,830 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:05,831 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:05,833 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:09,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:09,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820166811] [2023-04-01 03:05:09,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:09,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250381760] [2023-04-01 03:05:09,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250381760] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:09,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1802559361] [2023-04-01 03:05:09,520 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:05:09,521 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:09,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:09,521 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:09,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:09,557 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:09,738 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:09,753 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:09,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:09,763 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:11,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2992#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_10| Int)) (and (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_10|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#sum~0.base_BEFORE_CALL_10|)) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_10|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_10|) (not (= (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_10|) 0))) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_10|)))) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:11,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:11,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:11,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2023-04-01 03:05:11,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437356114] [2023-04-01 03:05:11,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:11,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-04-01 03:05:11,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:11,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-04-01 03:05:11,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2506, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 03:05:11,457 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 38 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:15,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:15,087 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2023-04-01 03:05:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 03:05:15,087 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-04-01 03:05:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:15,088 INFO L225 Difference]: With dead ends: 46 [2023-04-01 03:05:15,088 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 03:05:15,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=158, Invalid=2704, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 03:05:15,089 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:15,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 201 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 03:05:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 03:05:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2023-04-01 03:05:15,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-04-01 03:05:15,102 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 29 [2023-04-01 03:05:15,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:15,104 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-04-01 03:05:15,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:15,104 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-04-01 03:05:15,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 03:05:15,105 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:15,105 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:15,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 03:05:15,305 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,SelfDestructingSolverStorable10 [2023-04-01 03:05:15,306 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:15,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:15,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1415597202, now seen corresponding path program 11 times [2023-04-01 03:05:15,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:15,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082888100] [2023-04-01 03:05:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:15,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:15,332 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:15,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058252001] [2023-04-01 03:05:15,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:05:15,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:15,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:15,334 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) [2023-04-01 03:05:15,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 03:05:15,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 03:05:15,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:05:15,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 03:05:15,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:05:15,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:05:15,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:15,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082888100] [2023-04-01 03:05:15,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:15,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058252001] [2023-04-01 03:05:15,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058252001] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:15,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1757705723] [2023-04-01 03:05:15,890 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:05:15,890 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:15,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:15,890 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:15,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:15,923 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:16,101 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:16,124 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:16,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:16,131 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:16,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3354#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_11| Int)) (and (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_11|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_11|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#sum~0.base_BEFORE_CALL_11|)) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_11|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_11|) (not (= (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_11|) 0))))) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:16,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:16,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:16,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-04-01 03:05:16,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984190241] [2023-04-01 03:05:16,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:16,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 03:05:16,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:16,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 03:05:16,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-04-01 03:05:16,647 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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) [2023-04-01 03:05:16,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:16,916 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2023-04-01 03:05:16,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 03:05:16,917 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 30 [2023-04-01 03:05:16,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:16,917 INFO L225 Difference]: With dead ends: 53 [2023-04-01 03:05:16,917 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 03:05:16,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 03:05:16,919 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:16,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 74 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:05:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 03:05:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2023-04-01 03:05:16,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2023-04-01 03:05:16,933 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2023-04-01 03:05:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:16,934 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2023-04-01 03:05:16,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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) [2023-04-01 03:05:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2023-04-01 03:05:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 03:05:16,934 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:16,934 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:16,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 03:05:17,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 03:05:17,137 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:17,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:17,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1650871646, now seen corresponding path program 12 times [2023-04-01 03:05:17,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:17,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185065289] [2023-04-01 03:05:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:17,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:17,186 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:17,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639008272] [2023-04-01 03:05:17,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:05:17,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:17,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:17,199 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:05:17,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 03:05:17,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:05:17,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:05:17,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 03:05:17,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:05:17,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:05:17,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:17,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185065289] [2023-04-01 03:05:17,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:17,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639008272] [2023-04-01 03:05:17,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639008272] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:17,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1042432542] [2023-04-01 03:05:17,466 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:05:17,467 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:17,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:17,467 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:17,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:17,497 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:17,657 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:17,684 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:17,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:17,695 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:18,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3729#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_12| Int)) (and (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_12|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_12|) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_12|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_12|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#sum~0.base_BEFORE_CALL_12|)) (not (= (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_12|) 0))))) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:18,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:18,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:18,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2023-04-01 03:05:18,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283528387] [2023-04-01 03:05:18,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:18,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 03:05:18,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:18,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 03:05:18,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2023-04-01 03:05:18,312 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 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) [2023-04-01 03:05:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:18,475 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2023-04-01 03:05:18,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 03:05:18,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 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 30 [2023-04-01 03:05:18,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:18,476 INFO L225 Difference]: With dead ends: 55 [2023-04-01 03:05:18,476 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 03:05:18,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 03:05:18,477 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:18,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:05:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 03:05:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 03:05:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:05:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-04-01 03:05:18,490 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2023-04-01 03:05:18,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:18,490 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-04-01 03:05:18,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 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) [2023-04-01 03:05:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-04-01 03:05:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 03:05:18,491 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:18,491 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:18,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 03:05:18,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 03:05:18,693 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:18,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:18,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1156879233, now seen corresponding path program 13 times [2023-04-01 03:05:18,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:18,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622014798] [2023-04-01 03:05:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:18,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:18,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:05:18,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835352861] [2023-04-01 03:05:18,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:05:18,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:18,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:18,718 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:05:18,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 03:05:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:05:18,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 113 conjunts are in the unsatisfiable core [2023-04-01 03:05:18,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:18,850 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 [2023-04-01 03:05:18,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 03:05:18,872 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 [2023-04-01 03:05:18,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:05:18,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 03:05:18,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 03:05:19,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 58 [2023-04-01 03:05:19,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:19,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:19,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:19,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:19,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:19,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:19,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:19,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:19,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:19,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-04-01 03:05:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:19,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:20,079 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 7 treesize of output 5 [2023-04-01 03:05:20,136 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 9 treesize of output 7 [2023-04-01 03:05:20,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:20,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:05:20,231 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 9 treesize of output 7 [2023-04-01 03:05:20,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:20,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:05:20,367 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 9 treesize of output 7 [2023-04-01 03:05:20,369 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:20,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:20,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:05:20,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:20,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 03:05:20,663 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 9 treesize of output 7 [2023-04-01 03:05:20,665 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:21,383 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 5 treesize of output 3 [2023-04-01 03:05:22,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:22,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2023-04-01 03:05:22,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:22,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2023-04-01 03:05:22,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:22,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2023-04-01 03:05:22,078 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 18 treesize of output 16 [2023-04-01 03:05:22,106 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:22,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2023-04-01 03:05:22,161 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 5 treesize of output 3 [2023-04-01 03:05:22,166 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:23,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-04-01 03:05:23,039 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:23,041 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:23,042 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:23,043 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:23,044 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:23,047 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:23,048 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:24,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:24,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 48 [2023-04-01 03:05:24,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:24,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 66 [2023-04-01 03:05:24,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-04-01 03:05:24,065 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:24,066 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:24,067 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:24,069 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:24,070 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:24,071 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:25,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:05:25,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 77 [2023-04-01 03:05:25,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-04-01 03:05:25,080 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:25,081 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:25,082 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:25,083 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:25,084 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:25,087 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:25,088 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:25,089 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 03:05:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:05:36,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:36,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622014798] [2023-04-01 03:05:36,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:05:36,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835352861] [2023-04-01 03:05:36,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835352861] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:36,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2118369525] [2023-04-01 03:05:36,929 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:05:36,929 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:36,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:36,929 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:36,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:36,963 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:37,125 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-04-01 03:05:37,141 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:37,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:37,150 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:40,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4145#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_13| Int)) (and (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_13|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#sum~0.base_BEFORE_CALL_13|)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_13|)) (not (= (* ~N~0 4) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_13|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_13|) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_13|))) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:40,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:40,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:05:40,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2023-04-01 03:05:40,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511018972] [2023-04-01 03:05:40,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:40,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-04-01 03:05:40,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:40,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-04-01 03:05:40,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3143, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 03:05:40,064 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 44 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)