/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/ps5-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:30:22,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:30:22,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:30:22,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:30:22,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:30:22,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:30:22,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:30:22,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:30:22,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:30:22,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:30:22,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:30:22,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:30:22,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:30:22,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:30:22,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:30:22,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:30:22,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:30:22,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:30:22,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:30:22,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:30:22,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:30:22,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:30:22,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:30:22,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:30:22,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 05:30:22,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:30:22,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:30:22,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:30:22,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:30:22,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:30:22,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:30:22,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:30:22,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:30:22,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:30:22,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:30:22,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:30:22,731 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 05:30:22,755 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:30:22,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:30:22,755 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:30:22,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:30:22,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:30:22,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:30:22,756 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:30:22,757 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:30:22,757 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:30:22,757 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:30:22,758 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:30:22,758 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:30:22,758 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:30:22,758 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:30:22,758 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:30:22,758 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:30:22,758 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:30:22,758 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:30:22,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:30:22,759 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:30:22,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:30:22,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:30:22,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:30:22,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:30:22,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:30:22,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:30:22,761 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:30:22,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:30:22,761 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:30:22,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:30:22,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:30:22,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:30:22,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:30:22,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:30:22,762 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:30:22,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:30:22,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:30:22,762 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:30:22,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:30:22,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:30:22,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:30:22,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:30:22,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:30:23,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:30:23,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:30:23,016 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:30:23,017 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:30:23,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c [2023-04-01 05:30:24,157 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:30:24,326 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:30:24,326 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound50.c [2023-04-01 05:30:24,333 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3502817d5/4b9959ed7bd94788962f5e6d90d1b206/FLAG648813ea4 [2023-04-01 05:30:24,344 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3502817d5/4b9959ed7bd94788962f5e6d90d1b206 [2023-04-01 05:30:24,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:30:24,347 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:30:24,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:30:24,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:30:24,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:30:24,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:30:24" (1/1) ... [2023-04-01 05:30:24,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56efe723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:30:24, skipping insertion in model container [2023-04-01 05:30:24,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:30:24" (1/1) ... [2023-04-01 05:30:24,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:30:24,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:30:24,475 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/ps5-ll_unwindbound50.c[458,471] [2023-04-01 05:30:24,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:30:24,496 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:30:24,504 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/ps5-ll_unwindbound50.c[458,471] [2023-04-01 05:30:24,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:30:24,520 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:30:24,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:30:24 WrapperNode [2023-04-01 05:30:24,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:30:24,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:30:24,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:30:24,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:30:24,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:30:24" (1/1) ... [2023-04-01 05:30:24,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:30:24" (1/1) ... [2023-04-01 05:30:24,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:30:24" (1/1) ... [2023-04-01 05:30:24,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:30:24" (1/1) ... [2023-04-01 05:30:24,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:30:24" (1/1) ... [2023-04-01 05:30:24,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:30:24" (1/1) ... [2023-04-01 05:30:24,542 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:30:24" (1/1) ... [2023-04-01 05:30:24,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:30:24" (1/1) ... [2023-04-01 05:30:24,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:30:24,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:30:24,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:30:24,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:30:24,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:30:24" (1/1) ... [2023-04-01 05:30:24,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:30:24,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:30:24,575 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 05:30:24,577 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 05:30:24,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:30:24,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:30:24,602 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:30:24,602 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:30:24,602 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:30:24,602 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:30:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:30:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:30:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:30:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:30:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-01 05:30:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:30:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:30:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:30:24,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:30:24,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:30:24,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:30:24,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:30:24,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:30:24,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:30:24,658 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:30:24,659 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:30:24,817 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:30:24,847 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:30:24,847 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 05:30:24,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:30:24 BoogieIcfgContainer [2023-04-01 05:30:24,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:30:24,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:30:24,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:30:24,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:30:24,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:30:24" (1/3) ... [2023-04-01 05:30:24,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473a7ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:30:24, skipping insertion in model container [2023-04-01 05:30:24,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:30:24" (2/3) ... [2023-04-01 05:30:24,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473a7ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:30:24, skipping insertion in model container [2023-04-01 05:30:24,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:30:24" (3/3) ... [2023-04-01 05:30:24,863 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound50.c [2023-04-01 05:30:24,877 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:30:24,878 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:30:24,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:30:24,937 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;@7cde6f49, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:30:24,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:30:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 05:30:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 05:30:24,947 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:30:24,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:30:24,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:30:24,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:30:24,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1588681703, now seen corresponding path program 1 times [2023-04-01 05:30:24,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:30:24,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415496635] [2023-04-01 05:30:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:24,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:30:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:30:25,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:30:25,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415496635] [2023-04-01 05:30:25,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 05:30:25,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23955781] [2023-04-01 05:30:25,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:25,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:30:25,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:30:25,074 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 05:30:25,077 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 05:30:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:30:25,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 05:30:25,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:30:25,172 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 05:30:25,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:30:25,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23955781] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:30:25,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:30:25,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:30:25,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561518124] [2023-04-01 05:30:25,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:30:25,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:30:25,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:30:25,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:30:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:30:25,241 INFO L87 Difference]: Start difference. First operand has 25 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 05:30:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:30:25,263 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-04-01 05:30:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:30:25,265 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 05:30:25,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:30:25,271 INFO L225 Difference]: With dead ends: 41 [2023-04-01 05:30:25,271 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 05:30:25,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:30:25,276 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:30:25,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:30:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 05:30:25,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 05:30:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 05:30:25,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-04-01 05:30:25,330 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2023-04-01 05:30:25,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:30:25,331 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-04-01 05:30:25,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 05:30:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-04-01 05:30:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 05:30:25,338 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:30:25,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:30:25,348 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 05:30:25,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 05:30:25,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:30:25,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:30:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1599510784, now seen corresponding path program 1 times [2023-04-01 05:30:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:30:25,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828590861] [2023-04-01 05:30:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:25,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:30:25,581 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:30:25,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128638968] [2023-04-01 05:30:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:25,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:30:25,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:30:25,586 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 05:30:25,592 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 05:30:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:30:25,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 05:30:25,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:30:25,734 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 05:30:25,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:30:25,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:30:25,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828590861] [2023-04-01 05:30:25,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:30:25,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128638968] [2023-04-01 05:30:25,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128638968] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:30:25,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:30:25,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:30:25,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751123730] [2023-04-01 05:30:25,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:30:25,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:30:25,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:30:25,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:30:25,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:30:25,738 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 05:30:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:30:25,770 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-04-01 05:30:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:30:25,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-04-01 05:30:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:30:25,771 INFO L225 Difference]: With dead ends: 31 [2023-04-01 05:30:25,772 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 05:30:25,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:30:25,773 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:30:25,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:30:25,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 05:30:25,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-01 05:30:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 05:30:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-01 05:30:25,779 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2023-04-01 05:30:25,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:30:25,779 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-01 05:30:25,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 05:30:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-01 05:30:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 05:30:25,780 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:30:25,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:30:25,785 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 05:30:25,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 05:30:25,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:30:25,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:30:25,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1601298244, now seen corresponding path program 1 times [2023-04-01 05:30:25,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:30:25,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712220403] [2023-04-01 05:30:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:25,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:30:26,003 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:30:26,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964246144] [2023-04-01 05:30:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:26,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:30:26,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:30:26,009 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 05:30:26,011 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 05:30:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:30:26,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 05:30:26,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:30:26,156 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 05:30:26,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:30:26,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:30:26,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712220403] [2023-04-01 05:30:26,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:30:26,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964246144] [2023-04-01 05:30:26,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964246144] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:30:26,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:30:26,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 05:30:26,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163936332] [2023-04-01 05:30:26,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:30:26,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:30:26,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:30:26,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:30:26,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:30:26,159 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:30:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:30:26,217 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-04-01 05:30:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:30:26,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-01 05:30:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:30:26,219 INFO L225 Difference]: With dead ends: 33 [2023-04-01 05:30:26,219 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 05:30:26,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:30:26,220 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:30:26,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 74 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:30:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 05:30:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 05:30:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 05:30:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-01 05:30:26,228 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 15 [2023-04-01 05:30:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:30:26,229 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-01 05:30:26,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 05:30:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-01 05:30:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 05:30:26,230 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:30:26,230 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:30:26,237 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 05:30:26,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:30:26,436 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:30:26,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:30:26,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1088104383, now seen corresponding path program 1 times [2023-04-01 05:30:26,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:30:26,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632676977] [2023-04-01 05:30:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:26,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:30:26,451 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:30:26,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383262788] [2023-04-01 05:30:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:26,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:30:26,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:30:26,453 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 05:30:26,458 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 05:30:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:30:26,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 05:30:26,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:30:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:30:26,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:30:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:30:26,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:30:26,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632676977] [2023-04-01 05:30:26,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:30:26,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383262788] [2023-04-01 05:30:26,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383262788] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:30:26,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1723211894] [2023-04-01 05:30:26,679 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 05:30:26,680 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:30:26,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:30:26,687 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:30:26,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:30:26,772 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:30:27,573 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:30:27,577 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-01 05:30:27,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:30:27,593 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:30:28,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '570#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:30:28,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:30:28,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:30:28,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 05:30:28,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980120004] [2023-04-01 05:30:28,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:30:28,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:30:28,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:30:28,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:30:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-04-01 05:30:28,368 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 05:30:28,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:30:28,453 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2023-04-01 05:30:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:30:28,454 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 23 [2023-04-01 05:30:28,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:30:28,455 INFO L225 Difference]: With dead ends: 63 [2023-04-01 05:30:28,455 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 05:30:28,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-04-01 05:30:28,456 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:30:28,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 99 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:30:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 05:30:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-04-01 05:30:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 05:30:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2023-04-01 05:30:28,465 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 23 [2023-04-01 05:30:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:30:28,465 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2023-04-01 05:30:28,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 05:30:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2023-04-01 05:30:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 05:30:28,466 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:30:28,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:30:28,472 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 05:30:28,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:30:28,672 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:30:28,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:30:28,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1089891843, now seen corresponding path program 1 times [2023-04-01 05:30:28,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:30:28,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921690717] [2023-04-01 05:30:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:28,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:30:28,691 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:30:28,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109487449] [2023-04-01 05:30:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:28,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:30:28,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:30:28,697 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 05:30:28,699 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 05:30:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:30:28,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 05:30:28,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:30:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:30:28,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:30:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:30:28,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:30:28,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921690717] [2023-04-01 05:30:28,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:30:28,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109487449] [2023-04-01 05:30:28,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109487449] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:30:28,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503243165] [2023-04-01 05:30:28,917 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 05:30:28,918 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:30:28,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:30:28,918 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:30:28,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:30:28,949 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:30:29,352 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 83 for LOIs [2023-04-01 05:30:29,536 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-01 05:30:29,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:30:29,558 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:30:30,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '905#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~y~0_BEFORE_CALL_23 Int) (|v_old(~counter~0)_BEFORE_CALL_24| Int) (v_main_~c~0_BEFORE_CALL_19 Int) (v_main_~k~0_BEFORE_CALL_24 Int) (v_main_~x~0_BEFORE_CALL_23 Int)) (and (exists ((|v_main_#t~post5_21| Int)) (and (or (and (<= 0 (+ |#StackHeapBarrier| 32767 v_main_~k~0_BEFORE_CALL_24)) (<= v_main_~c~0_BEFORE_CALL_19 33025) (<= 1 |#StackHeapBarrier|) (<= 0 (+ v_main_~c~0_BEFORE_CALL_19 32767 v_main_~k~0_BEFORE_CALL_24)) (<= v_main_~c~0_BEFORE_CALL_19 v_main_~k~0_BEFORE_CALL_24) (= ~counter~0 (+ |v_main_#t~post5_21| 1)) (<= 2 (+ v_main_~c~0_BEFORE_CALL_19 |#StackHeapBarrier|)) (= v_main_~y~0_BEFORE_CALL_23 v_main_~c~0_BEFORE_CALL_19) (<= v_main_~c~0_BEFORE_CALL_19 (+ 33024 |#StackHeapBarrier|)) (<= 0 (+ v_main_~k~0_BEFORE_CALL_24 32768)) (<= v_main_~k~0_BEFORE_CALL_24 (+ 255 v_main_~c~0_BEFORE_CALL_19)) (= |v_old(~counter~0)_BEFORE_CALL_24| 0) (= |v_main_#t~post5_21| v_main_~c~0_BEFORE_CALL_19) (<= 1 v_main_~c~0_BEFORE_CALL_19) (<= v_main_~k~0_BEFORE_CALL_24 (+ 255 |#StackHeapBarrier|)) (= |#NULL.offset| 0) (<= (+ v_main_~c~0_BEFORE_CALL_19 v_main_~k~0_BEFORE_CALL_24) 33281) (<= v_main_~k~0_BEFORE_CALL_24 256) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (= |v_main_#t~post5_21| 0) (= v_main_~y~0_BEFORE_CALL_23 0) (<= 0 (+ v_main_~k~0_BEFORE_CALL_24 32768)) (= |v_old(~counter~0)_BEFORE_CALL_24| 0) (= v_main_~x~0_BEFORE_CALL_23 0) (= |#NULL.offset| 0) (= ~counter~0 1) (= v_main_~c~0_BEFORE_CALL_19 0) (<= v_main_~k~0_BEFORE_CALL_24 256) (= |#NULL.base| 0))) (< |v_main_#t~post5_21| 50))) (not (= (+ v_main_~y~0_BEFORE_CALL_23 (* 30 v_main_~x~0_BEFORE_CALL_23)) (+ (* (* v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23) 10) (* 15 (* v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23)) (* 6 (* v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23))))))))' at error location [2023-04-01 05:30:30,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:30:30,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:30:30,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-04-01 05:30:30,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866257608] [2023-04-01 05:30:30,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:30:30,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 05:30:30,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:30:30,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 05:30:30,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-04-01 05:30:30,596 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 05:30:30,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:30:30,732 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-04-01 05:30:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:30:30,733 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2023-04-01 05:30:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:30:30,736 INFO L225 Difference]: With dead ends: 65 [2023-04-01 05:30:30,737 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 05:30:30,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:30:30,739 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:30:30,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 84 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:30:30,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 05:30:30,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-04-01 05:30:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 05:30:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-04-01 05:30:30,762 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 23 [2023-04-01 05:30:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:30:30,763 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-04-01 05:30:30,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 05:30:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-04-01 05:30:30,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 05:30:30,765 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:30:30,765 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:30:30,773 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 05:30:30,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:30:30,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:30:30,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:30:30,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1030500817, now seen corresponding path program 1 times [2023-04-01 05:30:30,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:30:30,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272532492] [2023-04-01 05:30:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:30,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:30:30,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:30:30,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651815071] [2023-04-01 05:30:30,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:30:30,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:30:30,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:30:30,984 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 05:30:30,999 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 05:30:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:30:31,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 05:30:31,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:30:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 05:30:31,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:30:35,206 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (= (* c_main_~y~0 c_main_~k~0) (* c_main_~y~0 c_main_~y~0))) is different from false [2023-04-01 05:30:55,295 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_29 Int) (v_main_~y~0_BEFORE_CALL_28 Int)) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 10) (* 29 v_main_~y~0_BEFORE_CALL_28) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 6) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 15)) 30) 0) (= (* v_main_~y~0_BEFORE_CALL_28 v_main_~k~0_BEFORE_CALL_29) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28))))) is different from true [2023-04-01 05:31:13,429 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((v_main_~k~0_BEFORE_CALL_29 Int) (v_main_~y~0_BEFORE_CALL_28 Int)) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 10) (* 29 v_main_~y~0_BEFORE_CALL_28) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 6) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 15)) 30) 0) (= (* v_main_~y~0_BEFORE_CALL_28 v_main_~k~0_BEFORE_CALL_29) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28))))) is different from true [2023-04-01 05:31:19,508 WARN L839 $PredicateComparison]: unable to prove that (or (< c_main_~c~0 c_main_~k~0) (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (= (* c_main_~y~0 c_main_~k~0) (* c_main_~y~0 c_main_~y~0))) is different from false [2023-04-01 05:31:32,469 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1))))) is different from false [2023-04-01 05:31:34,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:31:34,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272532492] [2023-04-01 05:31:34,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:31:34,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651815071] [2023-04-01 05:31:34,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651815071] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:31:34,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1553139658] [2023-04-01 05:31:34,498 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 05:31:34,498 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:31:34,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:31:34,498 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:31:34,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:31:34,518 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:31:35,009 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:31:35,011 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-01 05:31:35,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:31:35,022 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:31:35,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1265#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:31:35,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:31:35,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:31:35,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-01 05:31:35,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065862447] [2023-04-01 05:31:35,745 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:31:35,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:31:35,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:31:35,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:31:35,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=584, Unknown=5, NotChecked=260, Total=930 [2023-04-01 05:31:35,746 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 05:31:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:31:35,874 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-04-01 05:31:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:31:35,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2023-04-01 05:31:35,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:31:35,876 INFO L225 Difference]: With dead ends: 56 [2023-04-01 05:31:35,876 INFO L226 Difference]: Without dead ends: 50 [2023-04-01 05:31:35,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=94, Invalid=677, Unknown=5, NotChecked=280, Total=1056 [2023-04-01 05:31:35,878 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:31:35,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:31:35,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-01 05:31:35,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-04-01 05:31:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 05:31:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-04-01 05:31:35,889 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 34 [2023-04-01 05:31:35,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:31:35,889 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-04-01 05:31:35,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 05:31:35,890 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-04-01 05:31:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 05:31:35,892 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:31:35,892 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:31:35,901 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 05:31:36,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:31:36,099 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:31:36,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:31:36,100 INFO L85 PathProgramCache]: Analyzing trace with hash -602942286, now seen corresponding path program 2 times [2023-04-01 05:31:36,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:31:36,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825451010] [2023-04-01 05:31:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:31:36,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:31:36,115 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:31:36,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369600786] [2023-04-01 05:31:36,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:31:36,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:31:36,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:31:36,128 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 05:31:36,143 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 05:31:36,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:31:36,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:31:36,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 05:31:36,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:31:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 05:31:36,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:31:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 05:31:36,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:31:36,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825451010] [2023-04-01 05:31:36,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:31:36,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369600786] [2023-04-01 05:31:36,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369600786] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:31:36,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [183049536] [2023-04-01 05:31:36,578 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 05:31:36,578 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:31:36,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:31:36,579 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:31:36,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:31:36,598 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:31:37,037 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 05:31:37,039 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-01 05:31:37,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:31:37,047 INFO L180 IcfgInterpreter]: Interpretation finished