/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 IntervalDomain -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:17:48,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:17:48,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:17:48,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:17:48,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:17:48,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:17:48,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:17:48,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:17:48,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:17:48,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:17:48,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:17:48,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:17:48,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:17:48,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:17:48,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:17:48,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:17:48,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:17:48,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:17:48,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:17:48,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:17:48,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:17:48,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:17:48,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:17:48,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:17:48,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 23:17:48,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:17:48,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:17:48,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:17:48,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:17:48,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:17:48,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:17:48,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:17:48,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:17:48,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:17:48,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:17:48,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:17:48,124 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 [2023-03-31 23:17:48,138 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:17:48,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:17:48,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:17:48,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:17:48,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:17:48,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:17:48,139 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:17:48,139 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:17:48,139 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:17:48,139 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:17:48,139 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:17:48,139 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:17:48,140 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:17:48,140 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:17:48,140 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:17:48,140 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:17:48,140 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:17:48,140 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:17:48,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:17:48,140 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:17:48,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:17:48,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:17:48,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:17:48,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:17:48,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:17:48,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:17:48,141 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:17:48,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:17:48,141 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:17:48,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:17:48,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:17:48,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:17:48,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:17:48,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:17:48,142 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:17:48,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:17:48,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:17:48,142 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:17:48,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:17:48,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:17:48,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:17:48,142 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:17:48,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:17:48,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:17:48,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:17:48,338 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:17:48,338 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:17:48,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2023-03-31 23:17:49,303 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:17:49,497 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:17:49,497 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2023-03-31 23:17:49,502 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be8d461b1/92a3e1617591412e8c4de3f6a627f33a/FLAG0c5e13a76 [2023-03-31 23:17:49,512 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be8d461b1/92a3e1617591412e8c4de3f6a627f33a [2023-03-31 23:17:49,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:17:49,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:17:49,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:17:49,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:17:49,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:17:49,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:17:49" (1/1) ... [2023-03-31 23:17:49,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf9ffe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:17:49, skipping insertion in model container [2023-03-31 23:17:49,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:17:49" (1/1) ... [2023-03-31 23:17:49,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:17:49,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:17:49,636 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] [2023-03-31 23:17:49,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:17:49,671 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:17:49,678 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] [2023-03-31 23:17:49,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:17:49,693 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:17:49,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:17:49 WrapperNode [2023-03-31 23:17:49,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:17:49,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:17:49,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:17:49,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:17:49,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:17:49" (1/1) ... [2023-03-31 23:17:49,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:17:49" (1/1) ... [2023-03-31 23:17:49,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:17:49" (1/1) ... [2023-03-31 23:17:49,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:17:49" (1/1) ... [2023-03-31 23:17:49,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:17:49" (1/1) ... [2023-03-31 23:17:49,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:17:49" (1/1) ... [2023-03-31 23:17:49,713 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:17:49" (1/1) ... [2023-03-31 23:17:49,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:17:49" (1/1) ... [2023-03-31 23:17:49,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:17:49,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:17:49,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:17:49,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:17:49,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:17:49" (1/1) ... [2023-03-31 23:17:49,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:17:49,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:17:49,737 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) [2023-03-31 23:17:49,743 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 [2023-03-31 23:17:49,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:17:49,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:17:49,760 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:17:49,760 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:17:49,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:17:49,760 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:17:49,760 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:17:49,760 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:17:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:17:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:17:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:17:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:17:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:17:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:17:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:17:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:17:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:17:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:17:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:17:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:17:49,808 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:17:49,810 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:17:49,950 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:17:49,967 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:17:49,968 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 23:17:49,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:17:49 BoogieIcfgContainer [2023-03-31 23:17:49,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:17:49,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:17:49,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:17:49,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:17:49,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:17:49" (1/3) ... [2023-03-31 23:17:49,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0964d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:17:49, skipping insertion in model container [2023-03-31 23:17:49,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:17:49" (2/3) ... [2023-03-31 23:17:49,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0964d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:17:49, skipping insertion in model container [2023-03-31 23:17:49,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:17:49" (3/3) ... [2023-03-31 23:17:49,997 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2023-03-31 23:17:50,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:17:50,011 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:17:50,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:17:50,047 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;@6766562f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:17:50,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:17:50,051 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) [2023-03-31 23:17:50,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 23:17:50,056 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:17:50,057 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] [2023-03-31 23:17:50,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:17:50,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:17:50,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1897632913, now seen corresponding path program 1 times [2023-03-31 23:17:50,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:17:50,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470174180] [2023-03-31 23:17:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:50,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:17:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:17:50,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:17:50,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470174180] [2023-03-31 23:17:50,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 23:17:50,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399447422] [2023-03-31 23:17:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:50,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:17:50,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:17:50,173 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) [2023-03-31 23:17:50,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:17:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:17:50,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 23:17:50,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:17:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:17:50,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:17:50,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399447422] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:17:50,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:17:50,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 23:17:50,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882175251] [2023-03-31 23:17:50,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:17:50,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 23:17:50,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:17:50,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 23:17:50,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:17:50,296 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) [2023-03-31 23:17:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:17:50,315 INFO L93 Difference]: Finished difference Result 59 states and 87 transitions. [2023-03-31 23:17:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 23:17:50,317 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 [2023-03-31 23:17:50,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:17:50,321 INFO L225 Difference]: With dead ends: 59 [2023-03-31 23:17:50,321 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 23:17:50,323 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 [2023-03-31 23:17:50,325 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 [2023-03-31 23:17:50,326 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] [2023-03-31 23:17:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 23:17:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-03-31 23:17:50,349 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) [2023-03-31 23:17:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-03-31 23:17:50,351 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 24 [2023-03-31 23:17:50,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:17:50,351 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-03-31 23:17:50,352 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) [2023-03-31 23:17:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-03-31 23:17:50,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 23:17:50,353 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:17:50,353 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] [2023-03-31 23:17:50,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 23:17:50,555 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 [2023-03-31 23:17:50,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:17:50,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:17:50,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1548109508, now seen corresponding path program 1 times [2023-03-31 23:17:50,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:17:50,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303900517] [2023-03-31 23:17:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:50,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:17:50,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:17:50,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637633040] [2023-03-31 23:17:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:50,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:17:50,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:17:50,589 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) [2023-03-31 23:17:50,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:17:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:17:50,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 23:17:50,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:17:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:17:50,691 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:17:50,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:17:50,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303900517] [2023-03-31 23:17:50,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:17:50,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637633040] [2023-03-31 23:17:50,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637633040] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:17:50,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:17:50,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:17:50,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909017797] [2023-03-31 23:17:50,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:17:50,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:17:50,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:17:50,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:17:50,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:17:50,698 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) [2023-03-31 23:17:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:17:50,788 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2023-03-31 23:17:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:17:50,788 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 [2023-03-31 23:17:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:17:50,790 INFO L225 Difference]: With dead ends: 51 [2023-03-31 23:17:50,790 INFO L226 Difference]: Without dead ends: 44 [2023-03-31 23:17:50,791 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 [2023-03-31 23:17:50,793 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2023-03-31 23:17:50,794 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] [2023-03-31 23:17:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-03-31 23:17:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2023-03-31 23:17:50,810 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) [2023-03-31 23:17:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2023-03-31 23:17:50,812 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 25 [2023-03-31 23:17:50,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:17:50,813 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2023-03-31 23:17:50,813 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) [2023-03-31 23:17:50,813 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2023-03-31 23:17:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 23:17:50,814 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:17:50,814 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] [2023-03-31 23:17:50,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:17:51,019 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 [2023-03-31 23:17:51,019 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:17:51,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:17:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1414952, now seen corresponding path program 1 times [2023-03-31 23:17:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:17:51,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366658825] [2023-03-31 23:17:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:17:51,049 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:17:51,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128626685] [2023-03-31 23:17:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:51,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:17:51,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:17:51,055 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) [2023-03-31 23:17:51,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:17:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:17:51,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 23:17:51,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:17:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:17:51,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:17:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:17:51,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:17:51,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366658825] [2023-03-31 23:17:51,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:17:51,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128626685] [2023-03-31 23:17:51,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128626685] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:17:51,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:17:51,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-03-31 23:17:51,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780069418] [2023-03-31 23:17:51,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:17:51,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:17:51,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:17:51,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:17:51,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:17:51,405 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) [2023-03-31 23:17:51,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:17:51,478 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-03-31 23:17:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:17:51,478 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 [2023-03-31 23:17:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:17:51,480 INFO L225 Difference]: With dead ends: 50 [2023-03-31 23:17:51,481 INFO L226 Difference]: Without dead ends: 48 [2023-03-31 23:17:51,481 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 [2023-03-31 23:17:51,483 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 [2023-03-31 23:17:51,486 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] [2023-03-31 23:17:51,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-03-31 23:17:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-03-31 23:17:51,500 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) [2023-03-31 23:17:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-03-31 23:17:51,502 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 28 [2023-03-31 23:17:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:17:51,503 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-03-31 23:17:51,503 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) [2023-03-31 23:17:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-03-31 23:17:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 23:17:51,504 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:17:51,504 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] [2023-03-31 23:17:51,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:17:51,708 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 [2023-03-31 23:17:51,709 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:17:51,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:17:51,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2146803478, now seen corresponding path program 1 times [2023-03-31 23:17:51,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:17:51,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945168693] [2023-03-31 23:17:51,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:51,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:17:51,720 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:17:51,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794745586] [2023-03-31 23:17:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:51,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:17:51,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:17:51,737 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) [2023-03-31 23:17:51,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:17:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:17:51,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 23:17:51,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:17:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:17:51,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:17:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:17:51,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:17:51,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945168693] [2023-03-31 23:17:51,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:17:51,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794745586] [2023-03-31 23:17:51,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794745586] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:17:51,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [17036011] [2023-03-31 23:17:51,887 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 23:17:51,888 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:17:51,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:17:51,893 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:17:51,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:17:51,944 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:17:52,216 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:17:52,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:17:52,224 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:17:52,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [17036011] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:17:52,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:17:52,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 7] total 21 [2023-03-31 23:17:52,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043746013] [2023-03-31 23:17:52,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:17:52,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 23:17:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:17:52,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 23:17:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-03-31 23:17:52,550 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 16 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:17:53,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:17:53,532 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2023-03-31 23:17:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 23:17:53,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 30 [2023-03-31 23:17:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:17:53,535 INFO L225 Difference]: With dead ends: 85 [2023-03-31 23:17:53,535 INFO L226 Difference]: Without dead ends: 78 [2023-03-31 23:17:53,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 23:17:53,540 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 118 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:17:53,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 7 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:17:53,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-03-31 23:17:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2023-03-31 23:17:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 35 states have internal predecessors, (42), 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) [2023-03-31 23:17:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2023-03-31 23:17:53,561 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 30 [2023-03-31 23:17:53,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:17:53,562 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2023-03-31 23:17:53,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:17:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2023-03-31 23:17:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 23:17:53,563 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:17:53,563 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] [2023-03-31 23:17:53,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-31 23:17:53,768 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 [2023-03-31 23:17:53,768 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:17:53,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:17:53,769 INFO L85 PathProgramCache]: Analyzing trace with hash -874024117, now seen corresponding path program 1 times [2023-03-31 23:17:53,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:17:53,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401754617] [2023-03-31 23:17:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:53,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:17:53,794 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:17:53,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128605208] [2023-03-31 23:17:53,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:53,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:17:53,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:17:53,799 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) [2023-03-31 23:17:53,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:17:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:17:53,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 23:17:53,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:17:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:17:54,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:17:54,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:17:54,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401754617] [2023-03-31 23:17:54,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:17:54,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128605208] [2023-03-31 23:17:54,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128605208] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:17:54,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [868239234] [2023-03-31 23:17:54,203 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-03-31 23:17:54,203 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:17:54,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:17:54,203 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:17:54,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:17:54,218 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:17:54,350 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 23:17:54,357 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:17:54,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:17:54,361 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:17:54,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1348#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:17:54,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:17:54,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:17:54,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-03-31 23:17:54,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844146100] [2023-03-31 23:17:54,903 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:17:54,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 23:17:54,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:17:54,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 23:17:54,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 23:17:54,904 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 23:17:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:17:55,130 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2023-03-31 23:17:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:17:55,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 33 [2023-03-31 23:17:55,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:17:55,131 INFO L225 Difference]: With dead ends: 69 [2023-03-31 23:17:55,131 INFO L226 Difference]: Without dead ends: 67 [2023-03-31 23:17:55,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 23:17:55,132 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:17:55,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 140 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:17:55,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-03-31 23:17:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2023-03-31 23:17:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 38 states have internal predecessors, (45), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-03-31 23:17:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2023-03-31 23:17:55,143 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 33 [2023-03-31 23:17:55,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:17:55,143 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2023-03-31 23:17:55,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 23:17:55,143 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2023-03-31 23:17:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 23:17:55,144 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:17:55,144 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] [2023-03-31 23:17:55,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:17:55,350 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 [2023-03-31 23:17:55,351 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:17:55,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:17:55,351 INFO L85 PathProgramCache]: Analyzing trace with hash -562648306, now seen corresponding path program 1 times [2023-03-31 23:17:55,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:17:55,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571855356] [2023-03-31 23:17:55,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:55,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:17:55,359 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:17:55,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926247972] [2023-03-31 23:17:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:55,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:17:55,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:17:55,360 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) [2023-03-31 23:17:55,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:17:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:17:55,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 23:17:55,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:17:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:17:55,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:17:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:17:55,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:17:55,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571855356] [2023-03-31 23:17:55,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:17:55,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926247972] [2023-03-31 23:17:55,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926247972] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:17:55,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1629001256] [2023-03-31 23:17:55,550 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:17:55,550 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:17:55,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:17:55,550 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:17:55,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:17:55,561 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:17:55,694 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-03-31 23:17:55,705 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:17:55,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:17:55,708 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:17:56,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1770#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:17:56,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:17:56,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:17:56,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-03-31 23:17:56,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730839172] [2023-03-31 23:17:56,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:17:56,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 23:17:56,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:17:56,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 23:17:56,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:17:56,206 INFO L87 Difference]: Start difference. First operand 58 states and 73 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) [2023-03-31 23:17:56,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:17:56,451 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2023-03-31 23:17:56,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:17:56,451 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 [2023-03-31 23:17:56,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:17:56,452 INFO L225 Difference]: With dead ends: 84 [2023-03-31 23:17:56,452 INFO L226 Difference]: Without dead ends: 82 [2023-03-31 23:17:56,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2023-03-31 23:17:56,453 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 55 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:17:56,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 210 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:17:56,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-03-31 23:17:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2023-03-31 23:17:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 54 states have internal predecessors, (65), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-03-31 23:17:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2023-03-31 23:17:56,466 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 33 [2023-03-31 23:17:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:17:56,467 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2023-03-31 23:17:56,467 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) [2023-03-31 23:17:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2023-03-31 23:17:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 23:17:56,467 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:17:56,467 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2023-03-31 23:17:56,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 23:17:56,672 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 [2023-03-31 23:17:56,672 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:17:56,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:17:56,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1622527176, now seen corresponding path program 1 times [2023-03-31 23:17:56,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:17:56,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957770749] [2023-03-31 23:17:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:56,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:17:56,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:17:56,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240323577] [2023-03-31 23:17:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:56,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:17:56,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:17:56,682 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) [2023-03-31 23:17:56,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 23:17:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:17:56,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:17:56,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:17:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 23:17:56,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:17:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 23:17:56,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:17:56,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957770749] [2023-03-31 23:17:56,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:17:56,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240323577] [2023-03-31 23:17:56,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240323577] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:17:56,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:17:56,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-31 23:17:56,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842366082] [2023-03-31 23:17:56,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:17:56,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:17:56,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:17:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:17:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-03-31 23:17:56,818 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-03-31 23:17:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:17:56,867 INFO L93 Difference]: Finished difference Result 111 states and 149 transitions. [2023-03-31 23:17:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:17:56,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 38 [2023-03-31 23:17:56,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:17:56,868 INFO L225 Difference]: With dead ends: 111 [2023-03-31 23:17:56,868 INFO L226 Difference]: Without dead ends: 109 [2023-03-31 23:17:56,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:17:56,869 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 [2023-03-31 23:17:56,869 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] [2023-03-31 23:17:56,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-03-31 23:17:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2023-03-31 23:17:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 67 states have internal predecessors, (83), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-03-31 23:17:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 143 transitions. [2023-03-31 23:17:56,890 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 143 transitions. Word has length 38 [2023-03-31 23:17:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:17:56,890 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 143 transitions. [2023-03-31 23:17:56,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-03-31 23:17:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 143 transitions. [2023-03-31 23:17:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 23:17:56,891 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:17:56,891 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] [2023-03-31 23:17:56,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 23:17:57,095 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 [2023-03-31 23:17:57,096 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:17:57,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:17:57,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1229660379, now seen corresponding path program 1 times [2023-03-31 23:17:57,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:17:57,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256999320] [2023-03-31 23:17:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:57,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:17:57,103 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:17:57,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318904124] [2023-03-31 23:17:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:17:57,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:17:57,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:17:57,104 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) [2023-03-31 23:17:57,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 23:17:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:17:57,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 38 conjunts are in the unsatisfiable core [2023-03-31 23:17:57,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:17:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:17:57,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:17:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:17:57,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:17:57,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256999320] [2023-03-31 23:17:57,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:17:57,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318904124] [2023-03-31 23:17:57,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318904124] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:17:57,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [958497755] [2023-03-31 23:17:57,546 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-03-31 23:17:57,547 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:17:57,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:17:57,547 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:17:57,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:17:57,557 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:17:57,745 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:17:57,748 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:17:57,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:17:57,751 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:17:58,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2848#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:17:58,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:17:58,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:17:58,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-03-31 23:17:58,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930603457] [2023-03-31 23:17:58,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:17:58,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 23:17:58,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:17:58,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 23:17:58,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 23:17:58,663 INFO L87 Difference]: Start difference. First operand 105 states and 143 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) [2023-03-31 23:18:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:01,755 INFO L93 Difference]: Finished difference Result 148 states and 202 transitions. [2023-03-31 23:18:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-31 23:18:01,755 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 [2023-03-31 23:18:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:01,758 INFO L225 Difference]: With dead ends: 148 [2023-03-31 23:18:01,758 INFO L226 Difference]: Without dead ends: 146 [2023-03-31 23:18:01,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=344, Invalid=2308, Unknown=0, NotChecked=0, Total=2652 [2023-03-31 23:18:01,760 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 150 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:18:01,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 173 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 23:18:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-03-31 23:18:01,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 124. [2023-03-31 23:18:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.240506329113924) internal successors, (98), 82 states have internal predecessors, (98), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-03-31 23:18:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 166 transitions. [2023-03-31 23:18:01,804 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 166 transitions. Word has length 38 [2023-03-31 23:18:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:01,804 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 166 transitions. [2023-03-31 23:18:01,804 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) [2023-03-31 23:18:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 166 transitions. [2023-03-31 23:18:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 23:18:01,805 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:01,805 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] [2023-03-31 23:18:01,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 23:18:02,011 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 [2023-03-31 23:18:02,012 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:02,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash -918284568, now seen corresponding path program 2 times [2023-03-31 23:18:02,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:02,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505403504] [2023-03-31 23:18:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:02,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:02,020 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:02,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408086328] [2023-03-31 23:18:02,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:18:02,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:02,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:02,022 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) [2023-03-31 23:18:02,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 23:18:02,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 23:18:02,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:18:02,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 23:18:02,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:18:02,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:18:02,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:02,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505403504] [2023-03-31 23:18:02,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:02,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408086328] [2023-03-31 23:18:02,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408086328] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:18:02,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:18:02,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:18:02,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498352464] [2023-03-31 23:18:02,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:18:02,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:18:02,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:18:02,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:18:02,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:18:02,076 INFO L87 Difference]: Start difference. First operand 124 states and 166 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) [2023-03-31 23:18:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:02,161 INFO L93 Difference]: Finished difference Result 164 states and 218 transitions. [2023-03-31 23:18:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:18:02,162 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 [2023-03-31 23:18:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:02,165 INFO L225 Difference]: With dead ends: 164 [2023-03-31 23:18:02,165 INFO L226 Difference]: Without dead ends: 116 [2023-03-31 23:18:02,166 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 [2023-03-31 23:18:02,167 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 19 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:18:02,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 131 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:18:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-03-31 23:18:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2023-03-31 23:18:02,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 72 states have internal predecessors, (82), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-03-31 23:18:02,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 150 transitions. [2023-03-31 23:18:02,202 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 150 transitions. Word has length 38 [2023-03-31 23:18:02,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:02,202 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 150 transitions. [2023-03-31 23:18:02,202 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) [2023-03-31 23:18:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 150 transitions. [2023-03-31 23:18:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 23:18:02,204 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:02,204 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2023-03-31 23:18:02,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-03-31 23:18:02,408 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 [2023-03-31 23:18:02,408 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:02,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1365373227, now seen corresponding path program 1 times [2023-03-31 23:18:02,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:02,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495598292] [2023-03-31 23:18:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:02,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:02,422 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:02,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883914160] [2023-03-31 23:18:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:02,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:02,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:02,429 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) [2023-03-31 23:18:02,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 23:18:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:18:02,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-31 23:18:02,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 23:18:02,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:18:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:18:02,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:02,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495598292] [2023-03-31 23:18:02,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:02,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883914160] [2023-03-31 23:18:02,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883914160] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:18:02,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:18:02,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-03-31 23:18:02,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399246359] [2023-03-31 23:18:02,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:18:02,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:18:02,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:18:02,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:18:02,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:18:02,535 INFO L87 Difference]: Start difference. First operand 114 states and 150 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-03-31 23:18:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:02,602 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2023-03-31 23:18:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:18:02,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 43 [2023-03-31 23:18:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:02,603 INFO L225 Difference]: With dead ends: 120 [2023-03-31 23:18:02,604 INFO L226 Difference]: Without dead ends: 118 [2023-03-31 23:18:02,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:18:02,604 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 [2023-03-31 23:18:02,604 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] [2023-03-31 23:18:02,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-03-31 23:18:02,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-03-31 23:18:02,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 75 states have internal predecessors, (85), 35 states have call successors, (35), 11 states have call predecessors, (35), 10 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-03-31 23:18:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 153 transitions. [2023-03-31 23:18:02,635 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 153 transitions. Word has length 43 [2023-03-31 23:18:02,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:02,635 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 153 transitions. [2023-03-31 23:18:02,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-03-31 23:18:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 153 transitions. [2023-03-31 23:18:02,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-03-31 23:18:02,636 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:02,636 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] [2023-03-31 23:18:02,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 23:18:02,840 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 [2023-03-31 23:18:02,840 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:02,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:02,841 INFO L85 PathProgramCache]: Analyzing trace with hash 656042662, now seen corresponding path program 1 times [2023-03-31 23:18:02,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:02,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419597079] [2023-03-31 23:18:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:02,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:02,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:02,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257270281] [2023-03-31 23:18:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:02,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:02,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:02,851 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) [2023-03-31 23:18:02,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 23:18:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:18:02,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 67 conjunts are in the unsatisfiable core [2023-03-31 23:18:02,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-03-31 23:18:03,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:18:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-03-31 23:18:04,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:04,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419597079] [2023-03-31 23:18:04,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:04,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257270281] [2023-03-31 23:18:04,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257270281] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:18:04,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1517169241] [2023-03-31 23:18:04,246 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-03-31 23:18:04,246 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:18:04,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:18:04,247 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:18:04,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:18:04,255 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:18:04,820 WARN L110 ntervalStateProvider]: Interval conversion did not stabilize in 12 iterations. Over-approximation may be very coarse. [2023-03-31 23:18:04,821 WARN L110 ntervalStateProvider]: Interval conversion did not stabilize in 12 iterations. Over-approximation may be very coarse. [2023-03-31 23:18:05,054 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:18:05,057 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:18:05,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:18:05,059 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:18:07,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4859#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:18:07,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:18:07,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:18:07,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-03-31 23:18:07,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743098159] [2023-03-31 23:18:07,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:18:07,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-31 23:18:07,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:18:07,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-31 23:18:07,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1890, Unknown=0, NotChecked=0, Total=2162 [2023-03-31 23:18:07,239 INFO L87 Difference]: Start difference. First operand 118 states and 153 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) [2023-03-31 23:18:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:18,338 INFO L93 Difference]: Finished difference Result 338 states and 469 transitions. [2023-03-31 23:18:18,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-03-31 23:18:18,338 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 [2023-03-31 23:18:18,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:18,339 INFO L225 Difference]: With dead ends: 338 [2023-03-31 23:18:18,339 INFO L226 Difference]: Without dead ends: 250 [2023-03-31 23:18:18,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=701, Invalid=4701, Unknown=0, NotChecked=0, Total=5402 [2023-03-31 23:18:18,342 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 176 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:18:18,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 197 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-03-31 23:18:18,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-03-31 23:18:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 207. [2023-03-31 23:18:18,430 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) [2023-03-31 23:18:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 274 transitions. [2023-03-31 23:18:18,431 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 274 transitions. Word has length 55 [2023-03-31 23:18:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:18,432 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 274 transitions. [2023-03-31 23:18:18,432 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) [2023-03-31 23:18:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 274 transitions. [2023-03-31 23:18:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-03-31 23:18:18,432 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:18,432 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] [2023-03-31 23:18:18,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-31 23:18:18,637 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 [2023-03-31 23:18:18,637 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:18,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash -537054492, now seen corresponding path program 1 times [2023-03-31 23:18:18,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:18,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179866971] [2023-03-31 23:18:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:18,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:18,644 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:18,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148045597] [2023-03-31 23:18:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:18,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:18,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:18,645 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) [2023-03-31 23:18:18,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-31 23:18:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:18:18,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 60 conjunts are in the unsatisfiable core [2023-03-31 23:18:18,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:18:19,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:18:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-31 23:18:19,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179866971] [2023-03-31 23:18:19,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148045597] [2023-03-31 23:18:19,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148045597] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:18:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1956972026] [2023-03-31 23:18:19,246 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-03-31 23:18:19,246 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:18:19,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:18:19,247 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:18:19,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:18:19,256 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:18:19,782 WARN L110 ntervalStateProvider]: Interval conversion did not stabilize in 12 iterations. Over-approximation may be very coarse. [2023-03-31 23:18:19,782 WARN L110 ntervalStateProvider]: Interval conversion did not stabilize in 12 iterations. Over-approximation may be very coarse. [2023-03-31 23:18:20,021 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:18:20,024 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:18:20,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:18:20,026 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:18:20,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6184#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:18:20,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:18:20,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:18:20,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2023-03-31 23:18:20,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305656834] [2023-03-31 23:18:20,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:18:20,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-31 23:18:20,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:18:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-31 23:18:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2023-03-31 23:18:20,845 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) [2023-03-31 23:18:29,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:29,251 INFO L93 Difference]: Finished difference Result 313 states and 423 transitions. [2023-03-31 23:18:29,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-31 23:18:29,252 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 63 [2023-03-31 23:18:29,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:29,253 INFO L225 Difference]: With dead ends: 313 [2023-03-31 23:18:29,253 INFO L226 Difference]: Without dead ends: 258 [2023-03-31 23:18:29,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=345, Invalid=2625, Unknown=0, NotChecked=0, Total=2970 [2023-03-31 23:18:29,254 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 106 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-03-31 23:18:29,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 317 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-03-31 23:18:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-03-31 23:18:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 217. [2023-03-31 23:18:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 140 states have (on average 1.1857142857142857) internal successors, (166), 142 states have internal predecessors, (166), 61 states have call successors, (61), 16 states have call predecessors, (61), 15 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2023-03-31 23:18:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 286 transitions. [2023-03-31 23:18:29,346 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 286 transitions. Word has length 63 [2023-03-31 23:18:29,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:29,346 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 286 transitions. [2023-03-31 23:18:29,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-03-31 23:18:29,346 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 286 transitions. [2023-03-31 23:18:29,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-03-31 23:18:29,347 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:29,347 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:18:29,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-03-31 23:18:29,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-31 23:18:29,552 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:29,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:29,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2074620657, now seen corresponding path program 2 times [2023-03-31 23:18:29,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:29,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186373899] [2023-03-31 23:18:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:29,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:29,560 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:29,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664152738] [2023-03-31 23:18:29,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:18:29,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:29,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:29,561 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:18:29,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-31 23:18:29,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 23:18:29,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:18:29,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 68 conjunts are in the unsatisfiable core [2023-03-31 23:18:29,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-03-31 23:18:30,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:18:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-03-31 23:18:31,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:31,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186373899] [2023-03-31 23:18:31,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:31,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664152738] [2023-03-31 23:18:31,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664152738] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:18:31,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2074051367] [2023-03-31 23:18:31,521 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-03-31 23:18:31,521 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:18:31,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:18:31,521 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:18:31,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:18:31,532 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:18:32,032 WARN L110 ntervalStateProvider]: Interval conversion did not stabilize in 12 iterations. Over-approximation may be very coarse. [2023-03-31 23:18:32,032 WARN L110 ntervalStateProvider]: Interval conversion did not stabilize in 12 iterations. Over-approximation may be very coarse. [2023-03-31 23:18:32,286 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:18:32,288 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:18:32,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:18:32,291 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:18:35,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7489#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:18:35,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:18:35,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:18:35,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2023-03-31 23:18:35,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737345014] [2023-03-31 23:18:35,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:18:35,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-03-31 23:18:35,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:18:35,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-03-31 23:18:35,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2023-03-31 23:18:35,370 INFO L87 Difference]: Start difference. First operand 217 states and 286 transitions. Second operand has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-03-31 23:18:49,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 23:18:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:56,647 INFO L93 Difference]: Finished difference Result 345 states and 467 transitions. [2023-03-31 23:18:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-03-31 23:18:56,648 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 68 [2023-03-31 23:18:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:56,650 INFO L225 Difference]: With dead ends: 345 [2023-03-31 23:18:56,650 INFO L226 Difference]: Without dead ends: 343 [2023-03-31 23:18:56,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=717, Invalid=4685, Unknown=0, NotChecked=0, Total=5402 [2023-03-31 23:18:56,652 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 224 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 186 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-03-31 23:18:56,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 345 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1066 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2023-03-31 23:18:56,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-03-31 23:18:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 304. [2023-03-31 23:18:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 194 states have (on average 1.2010309278350515) internal successors, (233), 196 states have internal predecessors, (233), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (87), 86 states have call predecessors, (87), 87 states have call successors, (87) [2023-03-31 23:18:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 409 transitions. [2023-03-31 23:18:56,815 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 409 transitions. Word has length 68 [2023-03-31 23:18:56,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:56,815 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 409 transitions. [2023-03-31 23:18:56,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-03-31 23:18:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 409 transitions. [2023-03-31 23:18:56,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-03-31 23:18:56,816 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:56,816 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:18:56,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-03-31 23:18:57,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-31 23:18:57,022 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:57,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:57,022 INFO L85 PathProgramCache]: Analyzing trace with hash -122986527, now seen corresponding path program 1 times [2023-03-31 23:18:57,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:57,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911923944] [2023-03-31 23:18:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:57,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:57,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:57,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417018489] [2023-03-31 23:18:57,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:57,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:57,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:57,036 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:18:57,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-03-31 23:18:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:18:57,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 79 conjunts are in the unsatisfiable core [2023-03-31 23:18:57,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-03-31 23:18:57,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:18:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-03-31 23:18:59,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:59,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911923944] [2023-03-31 23:18:59,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:59,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417018489] [2023-03-31 23:18:59,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417018489] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:18:59,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518461161] [2023-03-31 23:18:59,244 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-03-31 23:18:59,244 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:18:59,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:18:59,244 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:18:59,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:18:59,252 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:18:59,942 WARN L110 ntervalStateProvider]: Interval conversion did not stabilize in 12 iterations. Over-approximation may be very coarse. [2023-03-31 23:18:59,943 WARN L110 ntervalStateProvider]: Interval conversion did not stabilize in 12 iterations. Over-approximation may be very coarse. [2023-03-31 23:19:00,798 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:19:00,801 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:19:00,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:19:00,803 INFO L180 IcfgInterpreter]: Interpretation finished