/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/nla-digbench-scaling/cohencu-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:11:25,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:11:25,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:11:25,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:11:25,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:11:25,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:11:25,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:11:25,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:11:25,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:11:25,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:11:25,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:11:25,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:11:25,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:11:25,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:11:25,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:11:25,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:11:25,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:11:25,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:11:25,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:11:25,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:11:25,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:11:25,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:11:25,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:11:25,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:11:25,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 05:11:25,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:11:25,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:11:25,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:11:25,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:11:25,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:11:25,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:11:25,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:11:25,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:11:25,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:11:25,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:11:25,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:11:25,117 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 05:11:25,155 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:11:25,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:11:25,155 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:11:25,155 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:11:25,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:11:25,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:11:25,156 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:11:25,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:11:25,161 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:11:25,161 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:11:25,162 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:11:25,162 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:11:25,162 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:11:25,162 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:11:25,162 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:11:25,162 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:11:25,162 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:11:25,163 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:11:25,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:11:25,163 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:11:25,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:11:25,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:11:25,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:11:25,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:11:25,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:11:25,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:11:25,165 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:11:25,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:11:25,165 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:11:25,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:11:25,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:11:25,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:11:25,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:11:25,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:11:25,166 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:11:25,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:11:25,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:11:25,166 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:11:25,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:11:25,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:11:25,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:11:25,167 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:11:25,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:11:25,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:11:25,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:11:25,430 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:11:25,431 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:11:25,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c [2023-04-01 05:11:26,664 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:11:26,841 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:11:26,842 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c [2023-04-01 05:11:26,848 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41e97fa7d/eff528202bd5415c80fba8bcc4fa6095/FLAG12982964a [2023-04-01 05:11:26,859 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41e97fa7d/eff528202bd5415c80fba8bcc4fa6095 [2023-04-01 05:11:26,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:11:26,863 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:11:26,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:11:26,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:11:26,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:11:26,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:11:26" (1/1) ... [2023-04-01 05:11:26,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626a77e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:26, skipping insertion in model container [2023-04-01 05:11:26,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:11:26" (1/1) ... [2023-04-01 05:11:26,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:11:26,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:11:27,018 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/nla-digbench-scaling/cohencu-ll_valuebound10.c[588,601] [2023-04-01 05:11:27,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:11:27,043 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:11:27,050 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/nla-digbench-scaling/cohencu-ll_valuebound10.c[588,601] [2023-04-01 05:11:27,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:11:27,072 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:11:27,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:27 WrapperNode [2023-04-01 05:11:27,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:11:27,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:11:27,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:11:27,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:11:27,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:27" (1/1) ... [2023-04-01 05:11:27,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:27" (1/1) ... [2023-04-01 05:11:27,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:27" (1/1) ... [2023-04-01 05:11:27,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:27" (1/1) ... [2023-04-01 05:11:27,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:27" (1/1) ... [2023-04-01 05:11:27,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:27" (1/1) ... [2023-04-01 05:11:27,093 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:27" (1/1) ... [2023-04-01 05:11:27,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:27" (1/1) ... [2023-04-01 05:11:27,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:11:27,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:11:27,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:11:27,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:11:27,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:27" (1/1) ... [2023-04-01 05:11:27,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:11:27,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:27,136 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 05:11:27,139 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 05:11:27,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:11:27,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:11:27,166 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:11:27,166 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:11:27,166 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:11:27,167 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:11:27,167 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:11:27,167 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:11:27,167 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:11:27,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:11:27,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2023-04-01 05:11:27,167 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:11:27,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:11:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:11:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:11:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:11:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:11:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:11:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:11:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:11:27,228 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:11:27,230 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:11:27,522 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:11:27,560 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:11:27,561 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 05:11:27,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:11:27 BoogieIcfgContainer [2023-04-01 05:11:27,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:11:27,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:11:27,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:11:27,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:11:27,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:11:26" (1/3) ... [2023-04-01 05:11:27,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b677a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:11:27, skipping insertion in model container [2023-04-01 05:11:27,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:27" (2/3) ... [2023-04-01 05:11:27,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b677a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:11:27, skipping insertion in model container [2023-04-01 05:11:27,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:11:27" (3/3) ... [2023-04-01 05:11:27,580 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound10.c [2023-04-01 05:11:27,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:11:27,595 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:11:27,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:11:27,639 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;@174f291b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:11:27,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:11:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 05:11:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 05:11:27,650 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:27,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:27,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:27,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:27,656 INFO L85 PathProgramCache]: Analyzing trace with hash -36751625, now seen corresponding path program 1 times [2023-04-01 05:11:27,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:27,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132022954] [2023-04-01 05:11:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:27,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:28,045 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 05:11:28,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:28,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132022954] [2023-04-01 05:11:28,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132022954] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:11:28,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:11:28,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:11:28,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493765582] [2023-04-01 05:11:28,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:11:28,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:11:28,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:28,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:11:28,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:11:28,079 INFO L87 Difference]: Start difference. First operand has 32 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 05:11:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:28,245 INFO L93 Difference]: Finished difference Result 59 states and 94 transitions. [2023-04-01 05:11:28,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:11:28,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 14 [2023-04-01 05:11:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:28,254 INFO L225 Difference]: With dead ends: 59 [2023-04-01 05:11:28,255 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 05:11:28,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:11:28,264 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:28,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 86 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:11:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 05:11:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 05:11:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 05:11:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-04-01 05:11:28,319 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2023-04-01 05:11:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:28,320 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-04-01 05:11:28,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 05:11:28,321 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-04-01 05:11:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 05:11:28,322 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:28,323 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:28,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:11:28,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:28,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash 726531578, now seen corresponding path program 1 times [2023-04-01 05:11:28,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:28,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277714087] [2023-04-01 05:11:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:28,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:28,357 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:28,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451944872] [2023-04-01 05:11:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:28,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:28,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:28,371 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 05:11:28,374 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 05:11:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:28,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 05:11:28,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:11:28,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:11:28,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:28,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277714087] [2023-04-01 05:11:28,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451944872] [2023-04-01 05:11:28,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451944872] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1535350831] [2023-04-01 05:11:28,761 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 05:11:28,761 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:28,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:28,770 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:28,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:28,847 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:11:29,084 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-01 05:11:29,096 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 05:11:29,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:11:29,126 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:29,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1535350831] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:11:29,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:29,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 7] total 22 [2023-04-01 05:11:29,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110149714] [2023-04-01 05:11:29,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:11:29,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:11:29,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:29,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:11:29,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:11:29,486 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 05:11:31,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 05:11:32,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:32,703 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2023-04-01 05:11:32,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 05:11:32,704 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-04-01 05:11:32,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:32,705 INFO L225 Difference]: With dead ends: 63 [2023-04-01 05:11:32,705 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 05:11:32,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2023-04-01 05:11:32,707 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 85 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:32,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 11 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 05:11:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 05:11:32,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 05:11:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-01 05:11:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2023-04-01 05:11:32,732 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 19 [2023-04-01 05:11:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:32,732 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2023-04-01 05:11:32,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 05:11:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2023-04-01 05:11:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 05:11:32,734 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:32,734 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:32,743 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 05:11:32,940 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 05:11:32,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:32,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:32,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1549398967, now seen corresponding path program 1 times [2023-04-01 05:11:32,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:32,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056317029] [2023-04-01 05:11:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:32,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:32,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:32,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286595596] [2023-04-01 05:11:32,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:32,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:32,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:32,958 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 05:11:32,960 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 05:11:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:33,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 05:11:33,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 05:11:33,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 05:11:33,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:33,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056317029] [2023-04-01 05:11:33,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:33,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286595596] [2023-04-01 05:11:33,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286595596] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:33,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1285428642] [2023-04-01 05:11:33,268 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:11:33,268 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:33,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:33,268 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:33,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:33,296 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:11:35,167 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:11:35,170 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 05:11:35,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:11:35,201 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:35,839 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '795#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:11:35,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:35,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:35,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-04-01 05:11:35,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621293327] [2023-04-01 05:11:35,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:35,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 05:11:35,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:35,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 05:11:35,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-04-01 05:11:35,842 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2023-04-01 05:11:36,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:36,232 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2023-04-01 05:11:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:11:36,233 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 46 [2023-04-01 05:11:36,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:36,234 INFO L225 Difference]: With dead ends: 70 [2023-04-01 05:11:36,234 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 05:11:36,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-04-01 05:11:36,236 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:36,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 100 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 05:11:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 05:11:36,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2023-04-01 05:11:36,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-01 05:11:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-04-01 05:11:36,257 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 46 [2023-04-01 05:11:36,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:36,258 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-04-01 05:11:36,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2023-04-01 05:11:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-04-01 05:11:36,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 05:11:36,259 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:36,259 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:36,267 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 05:11:36,465 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 05:11:36,465 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:36,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:36,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1775784186, now seen corresponding path program 2 times [2023-04-01 05:11:36,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:36,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630503492] [2023-04-01 05:11:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:36,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:36,475 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:36,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744081326] [2023-04-01 05:11:36,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:11:36,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:36,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:36,477 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 05:11:36,480 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 05:11:36,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 05:11:36,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:36,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 05:11:36,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 05:11:36,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 05:11:36,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:36,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630503492] [2023-04-01 05:11:36,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:36,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744081326] [2023-04-01 05:11:36,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744081326] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:36,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020520476] [2023-04-01 05:11:36,709 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:11:36,709 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:36,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:36,710 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:36,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:36,727 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:11:37,660 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:11:37,663 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 05:11:37,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:11:37,674 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:38,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1324#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:11:38,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:38,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:38,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-01 05:11:38,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072359179] [2023-04-01 05:11:38,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:38,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:11:38,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:38,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:11:38,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-04-01 05:11:38,120 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-01 05:11:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:38,391 INFO L93 Difference]: Finished difference Result 91 states and 121 transitions. [2023-04-01 05:11:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:11:38,392 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 51 [2023-04-01 05:11:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:38,393 INFO L225 Difference]: With dead ends: 91 [2023-04-01 05:11:38,393 INFO L226 Difference]: Without dead ends: 89 [2023-04-01 05:11:38,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-04-01 05:11:38,395 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:38,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:11:38,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-04-01 05:11:38,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2023-04-01 05:11:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 39 states have internal predecessors, (39), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2023-04-01 05:11:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2023-04-01 05:11:38,440 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 51 [2023-04-01 05:11:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:38,440 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2023-04-01 05:11:38,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-01 05:11:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2023-04-01 05:11:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 05:11:38,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:38,441 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:38,454 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 05:11:38,647 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 05:11:38,647 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:38,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:38,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1077796183, now seen corresponding path program 3 times [2023-04-01 05:11:38,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:38,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329097612] [2023-04-01 05:11:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:38,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:38,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:38,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777001598] [2023-04-01 05:11:38,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:11:38,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:38,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:38,658 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 05:11:38,663 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 05:11:38,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:11:38,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:38,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 05:11:38,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 05:11:38,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 05:11:39,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:39,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329097612] [2023-04-01 05:11:39,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:39,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777001598] [2023-04-01 05:11:39,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777001598] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:39,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [93596546] [2023-04-01 05:11:39,118 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:11:39,118 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:39,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:39,118 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:39,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:39,132 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:11:40,225 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:11:40,228 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 05:11:40,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:11:40,239 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:40,763 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1956#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:11:40,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:40,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:40,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-04-01 05:11:40,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080651864] [2023-04-01 05:11:40,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:40,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 05:11:40,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:40,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 05:11:40,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2023-04-01 05:11:40,765 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-04-01 05:11:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:41,037 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2023-04-01 05:11:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:11:41,037 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 56 [2023-04-01 05:11:41,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:41,042 INFO L225 Difference]: With dead ends: 94 [2023-04-01 05:11:41,043 INFO L226 Difference]: Without dead ends: 82 [2023-04-01 05:11:41,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-04-01 05:11:41,047 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:41,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 137 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:11:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-04-01 05:11:41,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2023-04-01 05:11:41,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 44 states have internal predecessors, (45), 24 states have call successors, (24), 13 states have call predecessors, (24), 12 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-01 05:11:41,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2023-04-01 05:11:41,095 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 56 [2023-04-01 05:11:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:41,095 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2023-04-01 05:11:41,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-04-01 05:11:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2023-04-01 05:11:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 05:11:41,103 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:41,103 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:41,111 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 05:11:41,308 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 05:11:41,308 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:41,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:41,309 INFO L85 PathProgramCache]: Analyzing trace with hash -72955691, now seen corresponding path program 1 times [2023-04-01 05:11:41,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:41,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815916795] [2023-04-01 05:11:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:41,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:41,316 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:41,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308210331] [2023-04-01 05:11:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:41,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:41,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:41,319 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 05:11:41,330 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 05:11:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:41,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 05:11:41,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-01 05:11:41,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-01 05:11:41,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:41,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815916795] [2023-04-01 05:11:41,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:41,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308210331] [2023-04-01 05:11:41,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308210331] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:41,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542390648] [2023-04-01 05:11:41,812 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 05:11:41,812 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:41,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:41,813 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:41,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:41,831 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:11:42,666 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:11:42,668 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 05:11:42,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:11:42,681 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:43,261 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2681#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:11:43,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:43,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:43,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2023-04-01 05:11:43,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539957104] [2023-04-01 05:11:43,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:43,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 05:11:43,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:43,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 05:11:43,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2023-04-01 05:11:43,263 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 14 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2023-04-01 05:11:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:43,966 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2023-04-01 05:11:43,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 05:11:43,967 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) Word has length 72 [2023-04-01 05:11:43,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:43,969 INFO L225 Difference]: With dead ends: 98 [2023-04-01 05:11:43,969 INFO L226 Difference]: Without dead ends: 96 [2023-04-01 05:11:43,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 05:11:43,970 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 18 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:43,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 120 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 05:11:43,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-01 05:11:44,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2023-04-01 05:11:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-04-01 05:11:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2023-04-01 05:11:44,006 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 72 [2023-04-01 05:11:44,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:44,007 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2023-04-01 05:11:44,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2023-04-01 05:11:44,007 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2023-04-01 05:11:44,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 05:11:44,008 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:44,008 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:44,017 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 05:11:44,213 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 05:11:44,213 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:44,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:44,214 INFO L85 PathProgramCache]: Analyzing trace with hash 638285148, now seen corresponding path program 1 times [2023-04-01 05:11:44,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:44,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072041585] [2023-04-01 05:11:44,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:44,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:44,221 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:44,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151467884] [2023-04-01 05:11:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:44,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:44,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:44,225 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 05:11:44,226 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 05:11:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:44,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 05:11:44,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-04-01 05:11:44,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:44,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:44,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072041585] [2023-04-01 05:11:44,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:44,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151467884] [2023-04-01 05:11:44,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151467884] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:11:44,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2089778978] [2023-04-01 05:11:44,604 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 05:11:44,604 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:44,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:44,605 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:44,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:44,616 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:11:45,622 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:11:45,625 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 05:11:45,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:11:45,635 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:46,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3366#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:11:46,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:46,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:11:46,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-01 05:11:46,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330207964] [2023-04-01 05:11:46,199 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:46,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:11:46,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:46,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:11:46,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-04-01 05:11:46,202 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 05:11:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:46,410 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2023-04-01 05:11:46,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:11:46,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 77 [2023-04-01 05:11:46,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:46,411 INFO L225 Difference]: With dead ends: 101 [2023-04-01 05:11:46,411 INFO L226 Difference]: Without dead ends: 92 [2023-04-01 05:11:46,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2023-04-01 05:11:46,412 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:46,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 90 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:11:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-04-01 05:11:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-04-01 05:11:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 51 states have internal predecessors, (52), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-04-01 05:11:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2023-04-01 05:11:46,439 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 77 [2023-04-01 05:11:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:46,440 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2023-04-01 05:11:46,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 05:11:46,440 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2023-04-01 05:11:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 05:11:46,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:46,441 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:46,448 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 05:11:46,642 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 05:11:46,642 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:46,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:46,643 INFO L85 PathProgramCache]: Analyzing trace with hash 914576601, now seen corresponding path program 2 times [2023-04-01 05:11:46,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:46,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455492691] [2023-04-01 05:11:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:46,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:46,654 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:46,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527454131] [2023-04-01 05:11:46,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:11:46,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:46,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:46,662 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 05:11:46,663 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 05:11:46,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:11:46,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:46,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-01 05:11:46,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 107 proven. 38 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-04-01 05:11:47,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 107 proven. 38 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-04-01 05:11:48,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:48,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455492691] [2023-04-01 05:11:48,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:48,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527454131] [2023-04-01 05:11:48,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527454131] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:48,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [988626053] [2023-04-01 05:11:48,030 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 05:11:48,030 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:48,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:48,031 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:48,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:48,043 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:11:48,889 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:11:48,891 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 05:11:48,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:11:48,898 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:49,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4317#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:11:49,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:49,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:49,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2023-04-01 05:11:49,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341548839] [2023-04-01 05:11:49,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:49,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 05:11:49,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:49,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 05:11:49,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2023-04-01 05:11:49,805 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 12 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) [2023-04-01 05:11:53,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:11:55,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:12:00,304 WARN L223 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 05:12:01,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:12:01,947 INFO L93 Difference]: Finished difference Result 139 states and 168 transitions. [2023-04-01 05:12:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 05:12:01,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 12 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) Word has length 104 [2023-04-01 05:12:01,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:12:01,950 INFO L225 Difference]: With dead ends: 139 [2023-04-01 05:12:01,950 INFO L226 Difference]: Without dead ends: 125 [2023-04-01 05:12:01,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=250, Invalid=1390, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 05:12:01,951 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-04-01 05:12:01,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 93 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 360 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2023-04-01 05:12:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-04-01 05:12:02,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-04-01 05:12:02,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 64 states have (on average 1.078125) internal successors, (69), 66 states have internal predecessors, (69), 43 states have call successors, (43), 18 states have call predecessors, (43), 17 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-04-01 05:12:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 152 transitions. [2023-04-01 05:12:02,005 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 152 transitions. Word has length 104 [2023-04-01 05:12:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:12:02,005 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 152 transitions. [2023-04-01 05:12:02,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 12 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) [2023-04-01 05:12:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 152 transitions. [2023-04-01 05:12:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 05:12:02,006 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:12:02,007 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:12:02,017 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 05:12:02,217 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 05:12:02,218 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:12:02,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:12:02,218 INFO L85 PathProgramCache]: Analyzing trace with hash 211428058, now seen corresponding path program 4 times [2023-04-01 05:12:02,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:12:02,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8494646] [2023-04-01 05:12:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:12:02,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:12:02,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:12:02,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643341712] [2023-04-01 05:12:02,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:12:02,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:12:02,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:12:02,229 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 05:12:02,231 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 05:12:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:12:02,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 05:12:02,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:12:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 77 proven. 80 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-04-01 05:12:02,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:12:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 79 proven. 78 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-04-01 05:12:03,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:12:03,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8494646] [2023-04-01 05:12:03,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:12:03,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643341712] [2023-04-01 05:12:03,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643341712] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:12:03,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [155937821] [2023-04-01 05:12:03,060 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:12:03,060 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:12:03,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:12:03,060 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:12:03,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:12:03,073 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:12:04,043 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:12:04,046 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 05:12:04,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:12:04,056 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:12:04,633 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5401#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:12:04,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:12:04,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:12:04,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-04-01 05:12:04,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673771958] [2023-04-01 05:12:04,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:12:04,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 05:12:04,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:12:04,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 05:12:04,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2023-04-01 05:12:04,635 INFO L87 Difference]: Start difference. First operand 125 states and 152 transitions. Second operand has 19 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 11 states have call predecessors, (36), 10 states have call successors, (36) [2023-04-01 05:12:05,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:12:05,856 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2023-04-01 05:12:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 05:12:05,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 11 states have call predecessors, (36), 10 states have call successors, (36) Word has length 105 [2023-04-01 05:12:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:12:05,858 INFO L225 Difference]: With dead ends: 133 [2023-04-01 05:12:05,858 INFO L226 Difference]: Without dead ends: 131 [2023-04-01 05:12:05,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 05:12:05,859 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 25 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 05:12:05,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 146 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 05:12:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-01 05:12:05,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2023-04-01 05:12:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 69 states have internal predecessors, (72), 43 states have call successors, (43), 19 states have call predecessors, (43), 18 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-04-01 05:12:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2023-04-01 05:12:05,925 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 105 [2023-04-01 05:12:05,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:12:05,926 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2023-04-01 05:12:05,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 11 states have call predecessors, (36), 10 states have call successors, (36) [2023-04-01 05:12:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2023-04-01 05:12:05,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-01 05:12:05,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:12:05,929 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:12:05,938 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 05:12:06,136 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 05:12:06,136 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:12:06,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:12:06,136 INFO L85 PathProgramCache]: Analyzing trace with hash 769975029, now seen corresponding path program 2 times [2023-04-01 05:12:06,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:12:06,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74281502] [2023-04-01 05:12:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:12:06,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:12:06,145 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:12:06,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069837550] [2023-04-01 05:12:06,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:12:06,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:12:06,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:12:06,146 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 05:12:06,148 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 05:12:06,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:12:06,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:12:06,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 05:12:06,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:12:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2023-04-01 05:12:06,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:12:06,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:12:06,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74281502] [2023-04-01 05:12:06,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:12:06,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069837550] [2023-04-01 05:12:06,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069837550] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:12:06,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1370100925] [2023-04-01 05:12:06,633 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 05:12:06,633 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:12:06,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:12:06,634 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:12:06,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:12:06,647 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:12:07,658 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:12:07,661 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 05:12:07,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:12:07,671 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:12:08,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6231#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:12:08,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:12:08,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:12:08,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-01 05:12:08,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186576225] [2023-04-01 05:12:08,310 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:12:08,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 05:12:08,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:12:08,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 05:12:08,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-04-01 05:12:08,312 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 05:12:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:12:08,540 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2023-04-01 05:12:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:12:08,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 126 [2023-04-01 05:12:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:12:08,541 INFO L225 Difference]: With dead ends: 135 [2023-04-01 05:12:08,541 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 05:12:08,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-04-01 05:12:08,542 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:12:08,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 64 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:12:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 05:12:08,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-01 05:12:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 41 states have call successors, (41), 20 states have call predecessors, (41), 18 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-04-01 05:12:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2023-04-01 05:12:08,600 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 126 [2023-04-01 05:12:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:12:08,601 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2023-04-01 05:12:08,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 05:12:08,601 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2023-04-01 05:12:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-04-01 05:12:08,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:12:08,603 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:12:08,611 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 05:12:08,811 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 05:12:08,811 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:12:08,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:12:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash -47075047, now seen corresponding path program 3 times [2023-04-01 05:12:08,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:12:08,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792626241] [2023-04-01 05:12:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:12:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:12:08,825 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:12:08,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050528395] [2023-04-01 05:12:08,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:12:08,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:12:08,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:12:08,826 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 05:12:08,829 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 05:12:08,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:12:08,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:12:08,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 55 conjunts are in the unsatisfiable core [2023-04-01 05:12:08,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:12:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 73 proven. 256 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2023-04-01 05:12:09,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:12:09,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:12:09,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792626241] [2023-04-01 05:12:09,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:12:09,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050528395] [2023-04-01 05:12:09,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050528395] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:12:09,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1747810868] [2023-04-01 05:12:09,500 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 05:12:09,500 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:12:09,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:12:09,500 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:12:09,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:12:09,514 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:12:10,459 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:12:10,461 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 05:12:10,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:12:10,467 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:12:11,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7431#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:12:11,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:12:11,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:12:11,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-04-01 05:12:11,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539270170] [2023-04-01 05:12:11,125 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:12:11,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 05:12:11,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:12:11,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 05:12:11,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2023-04-01 05:12:11,127 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 9 states have call successors, (39) [2023-04-01 05:12:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:12:11,742 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2023-04-01 05:12:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 05:12:11,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 9 states have call successors, (39) Word has length 212 [2023-04-01 05:12:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:12:11,745 INFO L225 Difference]: With dead ends: 159 [2023-04-01 05:12:11,745 INFO L226 Difference]: Without dead ends: 148 [2023-04-01 05:12:11,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 435 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 05:12:11,746 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 13 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 05:12:11,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 203 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 05:12:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-04-01 05:12:11,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-04-01 05:12:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 46 states have call successors, (46), 23 states have call predecessors, (46), 21 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-04-01 05:12:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 171 transitions. [2023-04-01 05:12:11,815 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 171 transitions. Word has length 212 [2023-04-01 05:12:11,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:12:11,816 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 171 transitions. [2023-04-01 05:12:11,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 9 states have call successors, (39) [2023-04-01 05:12:11,816 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 171 transitions. [2023-04-01 05:12:11,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-04-01 05:12:11,818 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:12:11,818 INFO L195 NwaCegarLoop]: trace histogram [43, 42, 42, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:12:11,823 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 05:12:12,019 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 05:12:12,019 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:12:12,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:12:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash 245541628, now seen corresponding path program 4 times [2023-04-01 05:12:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:12:12,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874439264] [2023-04-01 05:12:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:12:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:12:12,029 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:12:12,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941721167] [2023-04-01 05:12:12,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:12:12,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:12:12,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:12:12,030 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 05:12:12,032 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 05:12:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:12:12,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 61 conjunts are in the unsatisfiable core [2023-04-01 05:12:12,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:12:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3724 backedges. 83 proven. 320 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-04-01 05:12:12,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:12:12,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:12:12,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874439264] [2023-04-01 05:12:12,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:12:12,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941721167] [2023-04-01 05:12:12,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941721167] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:12:12,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1034835701] [2023-04-01 05:12:12,693 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 05:12:12,694 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:12:12,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:12:12,694 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:12:12,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:12:12,713 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:12:13,837 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:12:13,840 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 05:12:13,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:12:13,848 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:12:14,711 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8777#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:12:14,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:12:14,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:12:14,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-04-01 05:12:14,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871616015] [2023-04-01 05:12:14,712 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:12:14,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 05:12:14,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:12:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 05:12:14,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2023-04-01 05:12:14,715 INFO L87 Difference]: Start difference. First operand 148 states and 171 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 10 states have call predecessors, (44), 10 states have call successors, (44) [2023-04-01 05:12:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:12:15,390 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2023-04-01 05:12:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 05:12:15,391 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 10 states have call predecessors, (44), 10 states have call successors, (44) Word has length 239 [2023-04-01 05:12:15,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:12:15,392 INFO L225 Difference]: With dead ends: 178 [2023-04-01 05:12:15,392 INFO L226 Difference]: Without dead ends: 167 [2023-04-01 05:12:15,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 488 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 05:12:15,392 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 13 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 05:12:15,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 234 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 05:12:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-04-01 05:12:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-04-01 05:12:15,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 51 states have call successors, (51), 26 states have call predecessors, (51), 24 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-04-01 05:12:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 192 transitions. [2023-04-01 05:12:15,464 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 192 transitions. Word has length 239 [2023-04-01 05:12:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:12:15,464 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 192 transitions. [2023-04-01 05:12:15,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 10 states have call predecessors, (44), 10 states have call successors, (44) [2023-04-01 05:12:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 192 transitions. [2023-04-01 05:12:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-04-01 05:12:15,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:12:15,467 INFO L195 NwaCegarLoop]: trace histogram [48, 47, 47, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:12:15,477 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 05:12:15,677 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 05:12:15,677 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:12:15,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:12:15,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1891081017, now seen corresponding path program 5 times [2023-04-01 05:12:15,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:12:15,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821077586] [2023-04-01 05:12:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:12:15,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:12:15,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:12:15,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872070723] [2023-04-01 05:12:15,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:12:15,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:12:15,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:12:15,695 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 05:12:15,698 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 05:12:15,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 05:12:15,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:12:15,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-01 05:12:15,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:12:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4670 backedges. 531 proven. 69 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2023-04-01 05:12:17,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:12:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4670 backedges. 388 proven. 39 refuted. 0 times theorem prover too weak. 4243 trivial. 0 not checked. [2023-04-01 05:12:19,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:12:19,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821077586] [2023-04-01 05:12:19,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:12:19,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872070723] [2023-04-01 05:12:19,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872070723] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:12:19,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556273079] [2023-04-01 05:12:19,673 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 05:12:19,673 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:12:19,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:12:19,675 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:12:19,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:12:19,690 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:12:20,482 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:12:20,484 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 05:12:20,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:12:20,490 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:12:21,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10930#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:12:21,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:12:21,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:12:21,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2023-04-01 05:12:21,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003852535] [2023-04-01 05:12:21,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:12:21,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 05:12:21,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:12:21,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 05:12:21,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 05:12:21,342 INFO L87 Difference]: Start difference. First operand 167 states and 192 transitions. Second operand has 20 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 10 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 9 states have call predecessors, (34), 10 states have call successors, (34) [2023-04-01 05:12:22,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:12:22,615 INFO L93 Difference]: Finished difference Result 167 states and 192 transitions. [2023-04-01 05:12:22,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 05:12:22,615 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 10 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 9 states have call predecessors, (34), 10 states have call successors, (34) Word has length 266 [2023-04-01 05:12:22,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:12:22,616 INFO L225 Difference]: With dead ends: 167 [2023-04-01 05:12:22,616 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 05:12:22,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 764 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 05:12:22,618 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 05:12:22,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 57 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 05:12:22,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 05:12:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 05:12:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 05:12:22,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 05:12:22,619 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 266 [2023-04-01 05:12:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:12:22,619 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 05:12:22,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 10 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 9 states have call predecessors, (34), 10 states have call successors, (34) [2023-04-01 05:12:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 05:12:22,619 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 05:12:22,621 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 05:12:22,629 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 05:12:22,829 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 05:12:22,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.