/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:22:45,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:22:45,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:22:45,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:22:45,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:22:45,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:22:45,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:22:45,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:22:45,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:22:45,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:22:45,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:22:45,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:22:45,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:22:45,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:22:45,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:22:45,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:22:45,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:22:45,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:22:45,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:22:45,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:22:45,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:22:45,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:22:45,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:22:45,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:22:45,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 11:22:45,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:22:45,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:22:45,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:22:45,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:22:45,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:22:45,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:22:45,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:22:45,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:22:45,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:22:45,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:22:45,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:22:45,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:22:45,111 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:22:45,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:22:45,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:22:45,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:22:45,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:22:45,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:22:45,112 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:22:45,113 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:22:45,113 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:22:45,114 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:22:45,114 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:22:45,114 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:22:45,114 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:22:45,114 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:22:45,114 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:22:45,114 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:22:45,115 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:22:45,115 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:22:45,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:22:45,115 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:22:45,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:22:45,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:22:45,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:22:45,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:22:45,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:22:45,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:22:45,117 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:22:45,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:22:45,117 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:22:45,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:22:45,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:22:45,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:22:45,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:22:45,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:22:45,118 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:22:45,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:22:45,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:22:45,119 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:22:45,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:22:45,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:22:45,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:22:45,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:22:45,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:22:45,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:22:45,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:22:45,353 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:22:45,354 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:22:45,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2023-04-01 11:22:46,466 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:22:46,677 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:22:46,678 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2023-04-01 11:22:46,684 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2da09bf5e/5b4c8509c0cc4d7e8a6b4f03c9c2e186/FLAG968ebd84f [2023-04-01 11:22:46,698 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2da09bf5e/5b4c8509c0cc4d7e8a6b4f03c9c2e186 [2023-04-01 11:22:46,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:22:46,702 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:22:46,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:22:46,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:22:46,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:22:46,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:22:46" (1/1) ... [2023-04-01 11:22:46,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34751629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:22:46, skipping insertion in model container [2023-04-01 11:22:46,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:22:46" (1/1) ... [2023-04-01 11:22:46,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:22:46,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:22:46,850 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/egcd3-ll_valuebound50.c[490,503] [2023-04-01 11:22:46,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:22:46,894 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:22:46,905 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/egcd3-ll_valuebound50.c[490,503] [2023-04-01 11:22:46,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:22:46,929 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:22:46,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:22:46 WrapperNode [2023-04-01 11:22:46,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:22:46,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:22:46,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:22:46,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:22:46,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:22:46" (1/1) ... [2023-04-01 11:22:46,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:22:46" (1/1) ... [2023-04-01 11:22:46,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:22:46" (1/1) ... [2023-04-01 11:22:46,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:22:46" (1/1) ... [2023-04-01 11:22:46,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:22:46" (1/1) ... [2023-04-01 11:22:46,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:22:46" (1/1) ... [2023-04-01 11:22:46,950 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:22:46" (1/1) ... [2023-04-01 11:22:46,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:22:46" (1/1) ... [2023-04-01 11:22:46,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:22:46,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:22:46,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:22:46,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:22:46,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:22:46" (1/1) ... [2023-04-01 11:22:46,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:22:46,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:22:46,980 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:22:47,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:22:47,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:22:47,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:22:47,047 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:22:47,048 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:22:47,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:22:47,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:22:47,049 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:22:47,049 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:22:47,049 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:22:47,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:22:47,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:22:47,050 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:22:47,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:22:47,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:22:47,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:22:47,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:22:47,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:22:47,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:22:47,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:22:47,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:22:47,107 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:22:47,109 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:22:47,305 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:22:47,328 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:22:47,328 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 11:22:47,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:22:47 BoogieIcfgContainer [2023-04-01 11:22:47,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:22:47,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:22:47,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:22:47,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:22:47,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:22:46" (1/3) ... [2023-04-01 11:22:47,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9a4798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:22:47, skipping insertion in model container [2023-04-01 11:22:47,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:22:46" (2/3) ... [2023-04-01 11:22:47,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9a4798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:22:47, skipping insertion in model container [2023-04-01 11:22:47,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:22:47" (3/3) ... [2023-04-01 11:22:47,336 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2023-04-01 11:22:47,349 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:22:47,349 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:22:47,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:22:47,436 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;@783bac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:22:47,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:22:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 11:22:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 11:22:47,449 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:22:47,450 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:22:47,451 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:22:47,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:22:47,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1897632913, now seen corresponding path program 1 times [2023-04-01 11:22:47,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:22:47,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413182147] [2023-04-01 11:22:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:47,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:22:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:22:47,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:22:47,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413182147] [2023-04-01 11:22:47,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 11:22:47,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808710576] [2023-04-01 11:22:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:47,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:22:47,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:22:47,671 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:22:47,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:22:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:22:47,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 11:22:47,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:22:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:22:47,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:22:47,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808710576] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:22:47,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:22:47,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:22:47,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127396945] [2023-04-01 11:22:47,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:22:47,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:22:47,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:22:47,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:22:47,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:22:47,858 INFO L87 Difference]: Start difference. First operand has 36 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 11:22:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:22:47,886 INFO L93 Difference]: Finished difference Result 59 states and 87 transitions. [2023-04-01 11:22:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:22:47,889 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 24 [2023-04-01 11:22:47,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:22:47,895 INFO L225 Difference]: With dead ends: 59 [2023-04-01 11:22:47,895 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 11:22:47,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 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 11:22:47,901 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:22:47,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:22:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 11:22:47,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 11:22:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 11:22:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-04-01 11:22:47,938 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 24 [2023-04-01 11:22:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:22:47,941 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-04-01 11:22:47,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 11:22:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-04-01 11:22:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 11:22:47,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:22:47,943 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:22:47,955 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 11:22:48,149 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 11:22:48,150 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:22:48,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:22:48,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1548109508, now seen corresponding path program 1 times [2023-04-01 11:22:48,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:22:48,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000227049] [2023-04-01 11:22:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:48,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:22:48,185 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:22:48,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389046423] [2023-04-01 11:22:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:48,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:22:48,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:22:48,190 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:22:48,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:22:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:22:48,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:22:48,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:22:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:22:48,300 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:22:48,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:22:48,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000227049] [2023-04-01 11:22:48,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:22:48,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389046423] [2023-04-01 11:22:48,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389046423] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:22:48,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:22:48,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:22:48,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608418818] [2023-04-01 11:22:48,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:22:48,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:22:48,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:22:48,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:22:48,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:22:48,304 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 11:22:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:22:48,415 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2023-04-01 11:22:48,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:22:48,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 25 [2023-04-01 11:22:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:22:48,418 INFO L225 Difference]: With dead ends: 51 [2023-04-01 11:22:48,418 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 11:22:48,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:22:48,420 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:22:48,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 84 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:22:48,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 11:22:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2023-04-01 11:22:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 11:22:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2023-04-01 11:22:48,443 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 25 [2023-04-01 11:22:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:22:48,443 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2023-04-01 11:22:48,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 11:22:48,444 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2023-04-01 11:22:48,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 11:22:48,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:22:48,446 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:22:48,455 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 11:22:48,655 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 11:22:48,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:22:48,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:22:48,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1414952, now seen corresponding path program 1 times [2023-04-01 11:22:48,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:22:48,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660198859] [2023-04-01 11:22:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:48,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:22:48,672 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:22:48,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709782692] [2023-04-01 11:22:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:48,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:22:48,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:22:48,673 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:22:48,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:22:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:22:48,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 11:22:48,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:22:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:22:48,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:22:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:22:48,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:22:48,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660198859] [2023-04-01 11:22:48,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:22:48,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709782692] [2023-04-01 11:22:48,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709782692] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:22:48,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:22:48,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-04-01 11:22:48,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071105340] [2023-04-01 11:22:48,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:22:48,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:22:48,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:22:49,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:22:49,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:22:49,000 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 11:22:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:22:49,062 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-04-01 11:22:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:22:49,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 28 [2023-04-01 11:22:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:22:49,064 INFO L225 Difference]: With dead ends: 50 [2023-04-01 11:22:49,064 INFO L226 Difference]: Without dead ends: 48 [2023-04-01 11:22:49,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-04-01 11:22:49,065 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:22:49,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 113 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:22:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-01 11:22:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-04-01 11:22:49,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 11:22:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-04-01 11:22:49,082 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 28 [2023-04-01 11:22:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:22:49,082 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-04-01 11:22:49,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 11:22:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-04-01 11:22:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 11:22:49,083 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:22:49,083 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:22:49,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 11:22:49,290 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 11:22:49,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:22:49,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:22:49,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2146803478, now seen corresponding path program 1 times [2023-04-01 11:22:49,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:22:49,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902176963] [2023-04-01 11:22:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:49,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:22:49,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:22:49,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046514761] [2023-04-01 11:22:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:49,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:22:49,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:22:49,309 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:22:49,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:22:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:22:49,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 11:22:49,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:22:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:22:49,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:22:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:22:49,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:22:49,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902176963] [2023-04-01 11:22:49,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:22:49,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046514761] [2023-04-01 11:22:49,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046514761] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:22:49,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1732664175] [2023-04-01 11:22:49,505 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-01 11:22:49,505 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:22:49,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:22:49,512 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:22:49,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:22:49,637 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:22:50,537 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 86 for LOIs [2023-04-01 11:22:50,603 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:22:50,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:22:50,627 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:22:52,077 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '968#(and (= (select |#length| 3) 12) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:22:52,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:22:52,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:22:52,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-04-01 11:22:52,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799235236] [2023-04-01 11:22:52,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:22:52,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:22:52,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:22:52,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:22:52,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-04-01 11:22:52,080 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 11:22:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:22:52,256 INFO L93 Difference]: Finished difference Result 100 states and 140 transitions. [2023-04-01 11:22:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:22:52,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2023-04-01 11:22:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:22:52,258 INFO L225 Difference]: With dead ends: 100 [2023-04-01 11:22:52,258 INFO L226 Difference]: Without dead ends: 93 [2023-04-01 11:22:52,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:22:52,260 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 59 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:22:52,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 153 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:22:52,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-01 11:22:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2023-04-01 11:22:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 45 states have internal predecessors, (56), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-01 11:22:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2023-04-01 11:22:52,274 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 30 [2023-04-01 11:22:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:22:52,274 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2023-04-01 11:22:52,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 11:22:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2023-04-01 11:22:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 11:22:52,275 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:22:52,275 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:22:52,283 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 11:22:52,481 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 11:22:52,481 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:22:52,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:22:52,481 INFO L85 PathProgramCache]: Analyzing trace with hash -874024117, now seen corresponding path program 1 times [2023-04-01 11:22:52,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:22:52,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962627643] [2023-04-01 11:22:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:52,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:22:52,496 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:22:52,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572732595] [2023-04-01 11:22:52,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:52,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:22:52,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:22:52,497 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 11:22:52,531 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 11:22:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:22:52,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 11:22:52,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:22:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 11:22:52,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:22:53,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:22:53,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962627643] [2023-04-01 11:22:53,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:22:53,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572732595] [2023-04-01 11:22:53,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572732595] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:22:53,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733818353] [2023-04-01 11:22:53,035 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 11:22:53,036 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:22:53,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:22:53,036 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:22:53,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:22:53,074 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:22:53,556 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 11:22:53,569 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:22:53,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:22:53,576 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:22:54,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [733818353] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:22:54,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:22:54,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 25 [2023-04-01 11:22:54,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791408739] [2023-04-01 11:22:54,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:22:54,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 11:22:54,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:22:54,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 11:22:54,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-04-01 11:22:54,447 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand has 14 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 11:22:55,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:22:55,505 INFO L93 Difference]: Finished difference Result 90 states and 123 transitions. [2023-04-01 11:22:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 11:22:55,506 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 5 states have call successors, (6) Word has length 33 [2023-04-01 11:22:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:22:55,509 INFO L225 Difference]: With dead ends: 90 [2023-04-01 11:22:55,509 INFO L226 Difference]: Without dead ends: 88 [2023-04-01 11:22:55,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 11:22:55,511 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 133 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:22:55,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 8 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 11:22:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-01 11:22:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2023-04-01 11:22:55,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 50 states have (on average 1.26) internal successors, (63), 52 states have internal predecessors, (63), 27 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 11:22:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2023-04-01 11:22:55,563 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 33 [2023-04-01 11:22:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:22:55,565 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2023-04-01 11:22:55,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 11:22:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2023-04-01 11:22:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 11:22:55,567 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:22:55,567 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:22:55,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 11:22:55,772 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 11:22:55,773 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:22:55,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:22:55,773 INFO L85 PathProgramCache]: Analyzing trace with hash -562648306, now seen corresponding path program 1 times [2023-04-01 11:22:55,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:22:55,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604164835] [2023-04-01 11:22:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:55,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:22:55,786 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:22:55,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042187700] [2023-04-01 11:22:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:55,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:22:55,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:22:55,788 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 11:22:55,790 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 11:22:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:22:55,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 11:22:55,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:22:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:22:55,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:22:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:22:55,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:22:55,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604164835] [2023-04-01 11:22:55,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:22:55,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042187700] [2023-04-01 11:22:55,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042187700] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:22:55,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295776408] [2023-04-01 11:22:55,990 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 11:22:55,990 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:22:55,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:22:55,991 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:22:55,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:22:56,017 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:22:56,502 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 83 for LOIs [2023-04-01 11:22:56,531 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:22:56,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:22:56,537 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:22:57,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1884#(and (= (select |#length| 3) 12) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:22:57,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:22:57,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:22:57,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-04-01 11:22:57,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040613268] [2023-04-01 11:22:57,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:22:57,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 11:22:57,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:22:57,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 11:22:57,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-04-01 11:22:57,748 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 11:22:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:22:57,961 INFO L93 Difference]: Finished difference Result 123 states and 167 transitions. [2023-04-01 11:22:57,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:22:57,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2023-04-01 11:22:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:22:57,963 INFO L225 Difference]: With dead ends: 123 [2023-04-01 11:22:57,964 INFO L226 Difference]: Without dead ends: 121 [2023-04-01 11:22:57,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2023-04-01 11:22:57,965 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 39 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:22:57,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 225 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:22:57,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-01 11:22:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2023-04-01 11:22:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 76 states have internal predecessors, (93), 35 states have call successors, (35), 8 states have call predecessors, (35), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-04-01 11:22:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2023-04-01 11:22:57,997 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 33 [2023-04-01 11:22:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:22:57,997 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2023-04-01 11:22:57,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 11:22:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2023-04-01 11:22:57,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 11:22:57,998 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:22:57,998 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:22:58,019 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 11:22:58,203 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 11:22:58,203 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:22:58,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:22:58,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1229660379, now seen corresponding path program 1 times [2023-04-01 11:22:58,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:22:58,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582015458] [2023-04-01 11:22:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:58,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:22:58,216 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:22:58,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45074665] [2023-04-01 11:22:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:58,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:22:58,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:22:58,225 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 11:22:58,227 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 11:22:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:22:58,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-01 11:22:58,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:22:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:22:58,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:22:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:22:58,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:22:58,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582015458] [2023-04-01 11:22:58,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:22:58,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45074665] [2023-04-01 11:22:58,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45074665] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:22:58,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328107535] [2023-04-01 11:22:58,644 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 11:22:58,644 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:22:58,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:22:58,646 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:22:58,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:22:58,675 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:22:59,244 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2023-04-01 11:22:59,259 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:22:59,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:22:59,265 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:23:00,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2515#(and (= (select |#length| 3) 12) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:23:00,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:23:00,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:23:00,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-04-01 11:23:00,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891079748] [2023-04-01 11:23:00,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:23:00,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 11:23:00,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:23:00,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 11:23:00,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2023-04-01 11:23:00,664 INFO L87 Difference]: Start difference. First operand 117 states and 161 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 11:23:05,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:23:05,205 INFO L93 Difference]: Finished difference Result 164 states and 220 transitions. [2023-04-01 11:23:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 11:23:05,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 38 [2023-04-01 11:23:05,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:23:05,206 INFO L225 Difference]: With dead ends: 164 [2023-04-01 11:23:05,207 INFO L226 Difference]: Without dead ends: 162 [2023-04-01 11:23:05,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=271, Invalid=1985, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 11:23:05,208 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 150 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:23:05,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 160 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 11:23:05,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-04-01 11:23:05,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 151. [2023-04-01 11:23:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 100 states have (on average 1.24) internal successors, (124), 105 states have internal predecessors, (124), 41 states have call successors, (41), 10 states have call predecessors, (41), 9 states have return successors, (39), 35 states have call predecessors, (39), 39 states have call successors, (39) [2023-04-01 11:23:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 204 transitions. [2023-04-01 11:23:05,278 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 204 transitions. Word has length 38 [2023-04-01 11:23:05,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:23:05,279 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 204 transitions. [2023-04-01 11:23:05,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 11:23:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 204 transitions. [2023-04-01 11:23:05,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 11:23:05,280 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:23:05,281 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:23:05,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 11:23:05,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:23:05,487 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:23:05,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:23:05,487 INFO L85 PathProgramCache]: Analyzing trace with hash -918284568, now seen corresponding path program 2 times [2023-04-01 11:23:05,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:23:05,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455789795] [2023-04-01 11:23:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:05,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:23:05,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:23:05,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868198988] [2023-04-01 11:23:05,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:23:05,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:23:05,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:23:05,511 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:23:05,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 11:23:05,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:23:05,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:23:05,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 11:23:05,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:23:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:23:05,576 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:23:05,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:23:05,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455789795] [2023-04-01 11:23:05,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:23:05,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868198988] [2023-04-01 11:23:05,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868198988] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:23:05,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:23:05,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:23:05,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702436859] [2023-04-01 11:23:05,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:23:05,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:23:05,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:23:05,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:23:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:23:05,579 INFO L87 Difference]: Start difference. First operand 151 states and 204 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 11:23:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:23:05,726 INFO L93 Difference]: Finished difference Result 205 states and 283 transitions. [2023-04-01 11:23:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:23:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 38 [2023-04-01 11:23:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:23:05,730 INFO L225 Difference]: With dead ends: 205 [2023-04-01 11:23:05,730 INFO L226 Difference]: Without dead ends: 142 [2023-04-01 11:23:05,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:23:05,735 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 19 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:23:05,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 131 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:23:05,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-04-01 11:23:05,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 107. [2023-04-01 11:23:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 70 states have internal predecessors, (77), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2023-04-01 11:23:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 137 transitions. [2023-04-01 11:23:05,784 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 137 transitions. Word has length 38 [2023-04-01 11:23:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:23:05,784 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 137 transitions. [2023-04-01 11:23:05,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 11:23:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 137 transitions. [2023-04-01 11:23:05,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 11:23:05,790 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:23:05,790 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:23:05,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 11:23:05,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 11:23:05,996 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:23:05,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:23:05,996 INFO L85 PathProgramCache]: Analyzing trace with hash 949205294, now seen corresponding path program 1 times [2023-04-01 11:23:05,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:23:05,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970479871] [2023-04-01 11:23:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:05,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:23:06,006 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:23:06,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247115158] [2023-04-01 11:23:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:06,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:23:06,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:23:06,013 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:23:06,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 11:23:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:23:06,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 11:23:06,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:23:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:23:06,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:23:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 11:23:06,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:23:06,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970479871] [2023-04-01 11:23:06,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:23:06,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247115158] [2023-04-01 11:23:06,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247115158] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:23:06,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:23:06,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-01 11:23:06,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870670534] [2023-04-01 11:23:06,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:23:06,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:23:06,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:23:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:23:06,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-04-01 11:23:06,233 INFO L87 Difference]: Start difference. First operand 107 states and 137 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 11:23:06,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:23:06,335 INFO L93 Difference]: Finished difference Result 128 states and 167 transitions. [2023-04-01 11:23:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:23:06,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-01 11:23:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:23:06,339 INFO L225 Difference]: With dead ends: 128 [2023-04-01 11:23:06,339 INFO L226 Difference]: Without dead ends: 126 [2023-04-01 11:23:06,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-04-01 11:23:06,343 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:23:06,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 108 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:23:06,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-04-01 11:23:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2023-04-01 11:23:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 39 states have call successors, (39), 11 states have call predecessors, (39), 10 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2023-04-01 11:23:06,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 162 transitions. [2023-04-01 11:23:06,401 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 162 transitions. Word has length 43 [2023-04-01 11:23:06,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:23:06,402 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 162 transitions. [2023-04-01 11:23:06,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 11:23:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 162 transitions. [2023-04-01 11:23:06,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 11:23:06,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:23:06,404 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:23:06,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 11:23:06,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:23:06,610 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:23:06,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:23:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1097192581, now seen corresponding path program 1 times [2023-04-01 11:23:06,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:23:06,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781757820] [2023-04-01 11:23:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:06,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:23:06,623 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:23:06,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026685966] [2023-04-01 11:23:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:06,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:23:06,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:23:06,629 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:23:06,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 11:23:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:23:06,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 11:23:06,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:23:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 11:23:06,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:23:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 11:23:06,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:23:06,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781757820] [2023-04-01 11:23:06,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:23:06,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026685966] [2023-04-01 11:23:06,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026685966] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:23:06,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:23:06,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-04-01 11:23:06,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065093295] [2023-04-01 11:23:06,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:23:06,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:23:06,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:23:06,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:23:06,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 11:23:06,804 INFO L87 Difference]: Start difference. First operand 123 states and 162 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 11:23:06,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:23:06,899 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2023-04-01 11:23:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:23:06,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-04-01 11:23:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:23:06,901 INFO L225 Difference]: With dead ends: 129 [2023-04-01 11:23:06,901 INFO L226 Difference]: Without dead ends: 127 [2023-04-01 11:23:06,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 11:23:06,902 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:23:06,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 118 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:23:06,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-04-01 11:23:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-04-01 11:23:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 80 states have internal predecessors, (89), 39 states have call successors, (39), 12 states have call predecessors, (39), 11 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2023-04-01 11:23:06,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2023-04-01 11:23:06,952 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 48 [2023-04-01 11:23:06,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:23:06,952 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2023-04-01 11:23:06,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 11:23:06,952 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2023-04-01 11:23:06,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 11:23:06,953 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:23:06,953 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:23:06,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 11:23:07,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 11:23:07,157 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:23:07,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:23:07,157 INFO L85 PathProgramCache]: Analyzing trace with hash 656042662, now seen corresponding path program 1 times [2023-04-01 11:23:07,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:23:07,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692538948] [2023-04-01 11:23:07,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:07,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:23:07,176 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:23:07,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054370584] [2023-04-01 11:23:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:07,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:23:07,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:23:07,185 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:23:07,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 11:23:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:23:07,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 67 conjunts are in the unsatisfiable core [2023-04-01 11:23:07,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:23:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 11:23:07,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:23:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 11:23:08,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:23:08,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692538948] [2023-04-01 11:23:08,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:23:08,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054370584] [2023-04-01 11:23:08,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054370584] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:23:08,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [420141520] [2023-04-01 11:23:08,633 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-04-01 11:23:08,634 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:23:08,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:23:08,634 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:23:08,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:23:08,666 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:23:15,947 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:23:15,949 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:23:15,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:23:15,955 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:23:21,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5363#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:23:21,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:23:21,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:23:21,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-04-01 11:23:21,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043707601] [2023-04-01 11:23:21,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:23:21,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 11:23:21,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:23:21,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 11:23:21,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 11:23:21,476 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand has 26 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-04-01 11:23:32,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:23:32,969 INFO L93 Difference]: Finished difference Result 338 states and 469 transitions. [2023-04-01 11:23:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-01 11:23:32,969 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 55 [2023-04-01 11:23:32,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:23:32,971 INFO L225 Difference]: With dead ends: 338 [2023-04-01 11:23:32,971 INFO L226 Difference]: Without dead ends: 250 [2023-04-01 11:23:32,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=610, Invalid=4220, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 11:23:32,973 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 170 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:23:32,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 258 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-04-01 11:23:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-04-01 11:23:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 207. [2023-04-01 11:23:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 133 states have (on average 1.1879699248120301) internal successors, (158), 136 states have internal predecessors, (158), 59 states have call successors, (59), 15 states have call predecessors, (59), 14 states have return successors, (57), 55 states have call predecessors, (57), 57 states have call successors, (57) [2023-04-01 11:23:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 274 transitions. [2023-04-01 11:23:33,079 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 274 transitions. Word has length 55 [2023-04-01 11:23:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:23:33,079 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 274 transitions. [2023-04-01 11:23:33,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 8 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-04-01 11:23:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 274 transitions. [2023-04-01 11:23:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 11:23:33,081 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:23:33,081 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:23:33,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 11:23:33,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 11:23:33,281 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:23:33,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:23:33,281 INFO L85 PathProgramCache]: Analyzing trace with hash -537054492, now seen corresponding path program 1 times [2023-04-01 11:23:33,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:23:33,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912571502] [2023-04-01 11:23:33,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:33,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:23:33,302 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:23:33,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48024808] [2023-04-01 11:23:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:23:33,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:23:33,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:23:33,305 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:23:33,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 11:23:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:23:33,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 60 conjunts are in the unsatisfiable core [2023-04-01 11:23:33,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:23:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 11:23:33,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:23:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 11:23:34,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:23:34,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912571502] [2023-04-01 11:23:34,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:23:34,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48024808] [2023-04-01 11:23:34,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48024808] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:23:34,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [989818058] [2023-04-01 11:23:34,009 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-01 11:23:34,009 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:23:34,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:23:34,009 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:23:34,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:23:34,028 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:23:35,943 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-01 11:23:37,012 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-01 11:23:38,578 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 11:23:39,387 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 11:23:40,496 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 11:23:40,723 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 11:23:43,443 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2023-04-01 11:23:43,455 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:23:43,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:23:43,459 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:23:46,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6684#(and (= (select |#length| 3) 12) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:23:46,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:23:46,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:23:46,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2023-04-01 11:23:46,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320216879] [2023-04-01 11:23:46,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:23:46,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 11:23:46,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:23:46,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 11:23:46,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 11:23:46,986 INFO L87 Difference]: Start difference. First operand 207 states and 274 transitions. Second operand has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15)