/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 EqDomain -i ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:26:44,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:26:44,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:26:44,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:26:44,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:26:44,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:26:44,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:26:44,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:26:44,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:26:44,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:26:44,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:26:44,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:26:44,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:26:44,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:26:44,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:26:44,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:26:44,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:26:44,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:26:44,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:26:44,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:26:44,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:26:44,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:26:44,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:26:44,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:26:44,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 11:26:44,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:26:44,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:26:44,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:26:44,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:26:44,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:26:44,765 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:26:44,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:26:44,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:26:44,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:26:44,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:26:44,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:26:44,770 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 11:26:44,791 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:26:44,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:26:44,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:26:44,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:26:44,791 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:26:44,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:26:44,792 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:26:44,792 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:26:44,792 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:26:44,792 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:26:44,792 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:26:44,792 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:26:44,792 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:26:44,792 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:26:44,792 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:26:44,796 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:26:44,796 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:26:44,796 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:26:44,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:26:44,797 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:26:44,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:26:44,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:26:44,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:26:44,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:26:44,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:26:44,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:26:44,798 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:26:44,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:26:44,798 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:26:44,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:26:44,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:26:44,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:26:44,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:26:44,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:26:44,799 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:26:44,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:26:44,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:26:44,800 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:26:44,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:26:44,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:26:44,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:26:44,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:26:44,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:26:44,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:26:44,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:26:44,969 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:26:44,971 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:26:44,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound50.c [2023-04-01 11:26:46,122 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:26:46,257 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:26:46,258 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound50.c [2023-04-01 11:26:46,262 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a5291ba8/8667a0489df14fe59878e65666c043d8/FLAG7cc3c8aa6 [2023-04-01 11:26:46,275 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a5291ba8/8667a0489df14fe59878e65666c043d8 [2023-04-01 11:26:46,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:26:46,278 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:26:46,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:26:46,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:26:46,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:26:46,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:26:46" (1/1) ... [2023-04-01 11:26:46,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@761aec7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:26:46, skipping insertion in model container [2023-04-01 11:26:46,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:26:46" (1/1) ... [2023-04-01 11:26:46,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:26:46,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:26:46,390 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/hard-u_valuebound50.c[537,550] [2023-04-01 11:26:46,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:26:46,410 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:26:46,418 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/hard-u_valuebound50.c[537,550] [2023-04-01 11:26:46,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:26:46,433 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:26:46,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:26:46 WrapperNode [2023-04-01 11:26:46,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:26:46,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:26:46,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:26:46,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:26:46,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:26:46" (1/1) ... [2023-04-01 11:26:46,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:26:46" (1/1) ... [2023-04-01 11:26:46,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:26:46" (1/1) ... [2023-04-01 11:26:46,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:26:46" (1/1) ... [2023-04-01 11:26:46,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:26:46" (1/1) ... [2023-04-01 11:26:46,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:26:46" (1/1) ... [2023-04-01 11:26:46,464 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:26:46" (1/1) ... [2023-04-01 11:26:46,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:26:46" (1/1) ... [2023-04-01 11:26:46,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:26:46,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:26:46,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:26:46,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:26:46,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:26:46" (1/1) ... [2023-04-01 11:26:46,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:26:46,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:26:46,494 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 11:26:46,506 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 11:26:46,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:26:46,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:26:46,542 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:26:46,546 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:26:46,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:26:46,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:26:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:26:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:26:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:26:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:26:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 11:26:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:26:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:26:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:26:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:26:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:26:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:26:46,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:26:46,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:26:46,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:26:46,592 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:26:46,594 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:26:46,742 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:26:46,790 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:26:46,790 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 11:26:46,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:26:46 BoogieIcfgContainer [2023-04-01 11:26:46,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:26:46,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:26:46,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:26:46,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:26:46,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:26:46" (1/3) ... [2023-04-01 11:26:46,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca404e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:26:46, skipping insertion in model container [2023-04-01 11:26:46,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:26:46" (2/3) ... [2023-04-01 11:26:46,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca404e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:26:46, skipping insertion in model container [2023-04-01 11:26:46,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:26:46" (3/3) ... [2023-04-01 11:26:46,811 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound50.c [2023-04-01 11:26:46,825 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:26:46,825 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:26:46,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:26:46,945 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;@606e24c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:26:46,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:26:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 11:26:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 11:26:46,954 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:26:46,955 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:26:46,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:26:46,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:26:46,973 INFO L85 PathProgramCache]: Analyzing trace with hash -91855496, now seen corresponding path program 1 times [2023-04-01 11:26:46,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:26:46,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347276296] [2023-04-01 11:26:46,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:46,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:26:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:26:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:26:47,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:26:47,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347276296] [2023-04-01 11:26:47,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347276296] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:26:47,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:26:47,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:26:47,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344255131] [2023-04-01 11:26:47,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:26:47,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:26:47,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:26:47,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:26:47,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:26:47,482 INFO L87 Difference]: Start difference. First operand has 33 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 11:26:47,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:26:47,580 INFO L93 Difference]: Finished difference Result 66 states and 105 transitions. [2023-04-01 11:26:47,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:26:47,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2023-04-01 11:26:47,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:26:47,587 INFO L225 Difference]: With dead ends: 66 [2023-04-01 11:26:47,587 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 11:26:47,590 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 11:26:47,593 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:26:47,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 119 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:26:47,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 11:26:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2023-04-01 11:26:47,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:26:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-04-01 11:26:47,620 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2023-04-01 11:26:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:26:47,620 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-04-01 11:26:47,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 11:26:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-04-01 11:26:47,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 11:26:47,622 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:26:47,622 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:26:47,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:26:47,622 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:26:47,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:26:47,623 INFO L85 PathProgramCache]: Analyzing trace with hash -445599122, now seen corresponding path program 1 times [2023-04-01 11:26:47,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:26:47,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725219113] [2023-04-01 11:26:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:47,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:26:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:26:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:26:47,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:26:47,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725219113] [2023-04-01 11:26:47,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725219113] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:26:47,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:26:47,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:26:47,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626746653] [2023-04-01 11:26:47,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:26:47,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:26:47,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:26:47,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:26:47,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:26:47,839 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 11:26:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:26:47,891 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2023-04-01 11:26:47,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:26:47,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2023-04-01 11:26:47,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:26:47,893 INFO L225 Difference]: With dead ends: 45 [2023-04-01 11:26:47,893 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 11:26:47,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 11:26:47,894 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:26:47,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 106 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:26:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 11:26:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2023-04-01 11:26:47,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:26:47,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-04-01 11:26:47,901 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 26 [2023-04-01 11:26:47,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:26:47,901 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-04-01 11:26:47,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 11:26:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-04-01 11:26:47,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 11:26:47,902 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:26:47,902 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:26:47,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:26:47,902 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:26:47,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:26:47,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1862588680, now seen corresponding path program 1 times [2023-04-01 11:26:47,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:26:47,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119867389] [2023-04-01 11:26:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:47,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:26:47,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:26:47,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782892648] [2023-04-01 11:26:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:47,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:47,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:26:47,943 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 11:26:47,944 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 11:26:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:26:48,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 11:26:48,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:26:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 11:26:48,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:26:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 11:26:48,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:26:48,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119867389] [2023-04-01 11:26:48,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:26:48,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782892648] [2023-04-01 11:26:48,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782892648] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:26:48,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [855363676] [2023-04-01 11:26:48,347 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:26:48,347 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:26:48,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:26:48,353 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:26:48,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:26:48,501 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:26:49,036 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 11:26:49,055 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 57 for LOIs [2023-04-01 11:26:49,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:26:49,070 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:26:49,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [855363676] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:26:49,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:26:49,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 7] total 22 [2023-04-01 11:26:49,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131235632] [2023-04-01 11:26:49,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:26:49,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 11:26:49,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:26:49,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 11:26:49,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-01 11:26:49,570 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 11:26:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:26:50,128 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2023-04-01 11:26:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:26:50,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 31 [2023-04-01 11:26:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:26:50,129 INFO L225 Difference]: With dead ends: 72 [2023-04-01 11:26:50,129 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 11:26:50,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-04-01 11:26:50,131 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:26:50,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 6 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:26:50,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 11:26:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-01 11:26:50,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 11:26:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2023-04-01 11:26:50,142 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 31 [2023-04-01 11:26:50,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:26:50,142 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2023-04-01 11:26:50,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 11:26:50,142 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2023-04-01 11:26:50,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 11:26:50,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:26:50,143 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 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 11:26:50,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 11:26:50,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:50,348 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:26:50,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:26:50,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1036351980, now seen corresponding path program 1 times [2023-04-01 11:26:50,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:26:50,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491816003] [2023-04-01 11:26:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:50,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:26:50,357 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:26:50,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570622177] [2023-04-01 11:26:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:50,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:50,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:26:50,385 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 11:26:50,385 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 11:26:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:26:50,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 11:26:50,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:26:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 11:26:50,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:26:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-01 11:26:50,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:26:50,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491816003] [2023-04-01 11:26:50,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:26:50,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570622177] [2023-04-01 11:26:50,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570622177] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:26:50,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1785123296] [2023-04-01 11:26:50,794 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-01 11:26:50,794 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:26:50,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:26:50,794 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:26:50,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:26:50,815 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:26:51,946 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:26:51,948 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 57 for LOIs [2023-04-01 11:26:51,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:26:51,954 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:27:00,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1039#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:27:00,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:27:00,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:27:00,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-04-01 11:27:00,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065954622] [2023-04-01 11:27:00,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:27:00,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 11:27:00,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:27:00,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 11:27:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=603, Unknown=4, NotChecked=0, Total=702 [2023-04-01 11:27:00,995 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2023-04-01 11:27:05,881 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 11:27:07,886 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 11:27:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:27:09,334 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-04-01 11:27:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:27:09,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) Word has length 48 [2023-04-01 11:27:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:27:09,337 INFO L225 Difference]: With dead ends: 78 [2023-04-01 11:27:09,337 INFO L226 Difference]: Without dead ends: 70 [2023-04-01 11:27:09,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=114, Invalid=694, Unknown=4, NotChecked=0, Total=812 [2023-04-01 11:27:09,338 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:27:09,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 148 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 311 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2023-04-01 11:27:09,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-01 11:27:09,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-04-01 11:27:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 22 states have call successors, (22), 10 states have call predecessors, (22), 9 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-01 11:27:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2023-04-01 11:27:09,353 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 48 [2023-04-01 11:27:09,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:27:09,353 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2023-04-01 11:27:09,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2023-04-01 11:27:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2023-04-01 11:27:09,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 11:27:09,354 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:27:09,354 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 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, 1] [2023-04-01 11:27:09,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 11:27:09,555 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,SelfDestructingSolverStorable3 [2023-04-01 11:27:09,555 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:27:09,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:27:09,555 INFO L85 PathProgramCache]: Analyzing trace with hash -860679289, now seen corresponding path program 1 times [2023-04-01 11:27:09,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:27:09,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539072752] [2023-04-01 11:27:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:27:09,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:27:09,563 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:27:09,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819115177] [2023-04-01 11:27:09,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:27:09,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:27:09,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:27:09,572 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 11:27:09,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:27:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:27:09,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 11:27:09,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:27:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 11:27:09,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:27:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 11:27:10,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:27:10,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539072752] [2023-04-01 11:27:10,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:27:10,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819115177] [2023-04-01 11:27:10,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819115177] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:27:10,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [933061243] [2023-04-01 11:27:10,815 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 11:27:10,815 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:27:10,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:27:10,815 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:27:10,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:27:10,833 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:27:11,832 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:27:11,841 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 57 for LOIs [2023-04-01 11:27:11,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:27:11,847 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:27:17,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1624#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:27:17,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:27:17,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:27:17,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-04-01 11:27:17,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179497301] [2023-04-01 11:27:17,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:27:17,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:27:17,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:27:17,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:27:17,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=599, Unknown=2, NotChecked=0, Total=702 [2023-04-01 11:27:17,826 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-01 11:27:19,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:27:19,685 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2023-04-01 11:27:19,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:27:19,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 55 [2023-04-01 11:27:19,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:27:19,686 INFO L225 Difference]: With dead ends: 82 [2023-04-01 11:27:19,686 INFO L226 Difference]: Without dead ends: 80 [2023-04-01 11:27:19,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=119, Invalid=691, Unknown=2, NotChecked=0, Total=812 [2023-04-01 11:27:19,688 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:27:19,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 133 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 11:27:19,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-04-01 11:27:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2023-04-01 11:27:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-01 11:27:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2023-04-01 11:27:19,702 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 55 [2023-04-01 11:27:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:27:19,702 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2023-04-01 11:27:19,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-01 11:27:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2023-04-01 11:27:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 11:27:19,703 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:27:19,703 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 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, 1, 1, 1] [2023-04-01 11:27:19,714 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 11:27:19,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:27:19,908 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:27:19,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:27:19,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1143149830, now seen corresponding path program 1 times [2023-04-01 11:27:19,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:27:19,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596914776] [2023-04-01 11:27:19,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:27:19,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:27:19,914 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:27:19,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758073709] [2023-04-01 11:27:19,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:27:19,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:27:19,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:27:19,926 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 11:27:19,933 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 11:27:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:27:20,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 11:27:20,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:27:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-01 11:27:21,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:27:42,443 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~p~0 4294967296)) (.cse0 (mod c_main_~d~0 4294967296))) (or (not (= (mod (* c_main_~p~0 c_main_~B~0) 4294967296) .cse0)) (= .cse1 1) (let ((.cse5 (div .cse0 2))) (let ((.cse3 (mod .cse5 4294967296)) (.cse2 (mod c_main_~r~0 4294967296)) (.cse4 (mod c_main_~A~0 4294967296)) (.cse6 (* c_main_~q~0 c_main_~B~0))) (and (or (< .cse2 .cse3) (= .cse4 (mod (+ (* 4294967295 .cse5) c_main_~r~0 .cse6 (* c_main_~B~0 (div .cse1 2))) 4294967296))) (or (<= .cse3 .cse2) (= .cse4 (mod (+ c_main_~r~0 .cse6) 4294967296)))))))) is different from true