/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:11:19,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:11:19,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:11:19,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:11:19,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:11:19,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:11:19,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:11:19,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:11:19,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:11:19,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:11:19,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:11:19,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:11:19,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:11:19,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:11:19,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:11:19,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:11:19,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:11:19,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:11:20,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:11:20,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:11:20,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:11:20,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:11:20,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:11:20,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:11:20,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:11:20,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:11:20,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:11:20,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:11:20,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:11:20,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:11:20,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:11:20,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:11:20,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:11:20,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:11:20,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:11:20,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:11:20,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:11:20,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:11:20,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:11:20,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:11:20,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:11:20,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:11:20,075 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:11:20,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:11:20,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:11:20,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:11:20,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:11:20,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:11:20,077 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:11:20,077 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:11:20,078 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:11:20,078 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:11:20,078 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:11:20,078 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:11:20,079 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:11:20,079 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:11:20,079 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:11:20,079 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:11:20,079 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:11:20,079 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:11:20,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:11:20,080 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:11:20,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:11:20,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:11:20,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:11:20,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:11:20,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:11:20,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:11:20,081 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:11:20,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:11:20,081 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:11:20,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:11:20,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:11:20,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:11:20,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:11:20,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:11:20,082 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:11:20,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:11:20,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:11:20,083 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:11:20,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:11:20,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:11:20,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:11:20,083 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:11:20,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:11:20,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:11:20,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:11:20,364 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:11:20,364 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:11:20,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2023-04-01 05:11:21,564 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:11:21,769 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:11:21,769 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2023-04-01 05:11:21,775 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/156017ae6/5f0388cc158644f297c585ca25ebf0cf/FLAG1da3705ef [2023-04-01 05:11:21,789 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/156017ae6/5f0388cc158644f297c585ca25ebf0cf [2023-04-01 05:11:21,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:11:21,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:11:21,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:11:21,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:11:21,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:11:21,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:11:21" (1/1) ... [2023-04-01 05:11:21,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33144000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:21, skipping insertion in model container [2023-04-01 05:11:21,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:11:21" (1/1) ... [2023-04-01 05:11:21,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:11:21,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:11:21,974 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c[588,601] [2023-04-01 05:11:22,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:11:22,019 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:11:22,031 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c[588,601] [2023-04-01 05:11:22,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:11:22,066 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:11:22,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:22 WrapperNode [2023-04-01 05:11:22,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:11:22,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:11:22,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:11:22,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:11:22,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:22" (1/1) ... [2023-04-01 05:11:22,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:22" (1/1) ... [2023-04-01 05:11:22,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:22" (1/1) ... [2023-04-01 05:11:22,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:22" (1/1) ... [2023-04-01 05:11:22,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:22" (1/1) ... [2023-04-01 05:11:22,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:22" (1/1) ... [2023-04-01 05:11:22,104 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:22" (1/1) ... [2023-04-01 05:11:22,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:22" (1/1) ... [2023-04-01 05:11:22,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:11:22,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:11:22,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:11:22,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:11:22,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:22" (1/1) ... [2023-04-01 05:11:22,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:11:22,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:22,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:11:22,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:11:22,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:11:22,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:11:22,183 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:11:22,185 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:11:22,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:11:22,185 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:11:22,185 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:11:22,185 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:11:22,185 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:11:22,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:11:22,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2023-04-01 05:11:22,186 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:11:22,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:11:22,186 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:11:22,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:11:22,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:11:22,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:11:22,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:11:22,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:11:22,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:11:22,249 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:11:22,252 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:11:22,411 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:11:22,431 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:11:22,431 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 05:11:22,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:11:22 BoogieIcfgContainer [2023-04-01 05:11:22,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:11:22,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:11:22,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:11:22,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:11:22,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:11:21" (1/3) ... [2023-04-01 05:11:22,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b2d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:11:22, skipping insertion in model container [2023-04-01 05:11:22,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:22" (2/3) ... [2023-04-01 05:11:22,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b2d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:11:22, skipping insertion in model container [2023-04-01 05:11:22,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:11:22" (3/3) ... [2023-04-01 05:11:22,441 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound5.c [2023-04-01 05:11:22,460 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:11:22,460 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:11:22,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:11:22,543 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;@5905eecf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:11:22,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:11:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 05:11:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 05:11:22,553 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:22,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:22,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:22,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:22,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1647932821, now seen corresponding path program 1 times [2023-04-01 05:11:22,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:22,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179963060] [2023-04-01 05:11:22,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:22,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:11:22,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:22,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179963060] [2023-04-01 05:11:22,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179963060] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:11:22,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:11:22,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:11:22,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293479065] [2023-04-01 05:11:22,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:11:22,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:11:22,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:11:22,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:11:22,828 INFO L87 Difference]: Start difference. First operand has 29 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:11:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:22,872 INFO L93 Difference]: Finished difference Result 53 states and 90 transitions. [2023-04-01 05:11:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:11:22,874 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-01 05:11:22,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:22,881 INFO L225 Difference]: With dead ends: 53 [2023-04-01 05:11:22,881 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 05:11:22,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:11:22,890 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:22,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:11:22,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 05:11:22,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 05:11:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 05:11:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2023-04-01 05:11:22,937 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 10 [2023-04-01 05:11:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:22,938 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2023-04-01 05:11:22,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:11:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2023-04-01 05:11:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 05:11:22,942 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:22,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:22,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:11:22,942 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:22,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:22,947 INFO L85 PathProgramCache]: Analyzing trace with hash -78558798, now seen corresponding path program 1 times [2023-04-01 05:11:22,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:22,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488137498] [2023-04-01 05:11:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:22,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:11:23,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:23,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488137498] [2023-04-01 05:11:23,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488137498] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:11:23,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:11:23,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:11:23,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846779267] [2023-04-01 05:11:23,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:11:23,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:11:23,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:23,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:11:23,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:11:23,147 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:11:23,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:23,183 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2023-04-01 05:11:23,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:11:23,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 05:11:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:23,186 INFO L225 Difference]: With dead ends: 39 [2023-04-01 05:11:23,187 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 05:11:23,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:11:23,190 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:23,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:11:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 05:11:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 05:11:23,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 05:11:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2023-04-01 05:11:23,198 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 11 [2023-04-01 05:11:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:23,198 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2023-04-01 05:11:23,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:11:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2023-04-01 05:11:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 05:11:23,199 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:23,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:23,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:11:23,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:23,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:23,205 INFO L85 PathProgramCache]: Analyzing trace with hash -77009666, now seen corresponding path program 1 times [2023-04-01 05:11:23,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:23,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474383783] [2023-04-01 05:11:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:23,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:11:23,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:23,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474383783] [2023-04-01 05:11:23,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474383783] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:11:23,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:11:23,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:11:23,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168624629] [2023-04-01 05:11:23,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:11:23,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:11:23,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:23,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:11:23,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:11:23,357 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:11:23,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:23,446 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-04-01 05:11:23,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:11:23,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 05:11:23,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:23,448 INFO L225 Difference]: With dead ends: 33 [2023-04-01 05:11:23,448 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 05:11:23,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:11:23,452 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:23,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 70 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:11:23,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 05:11:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 05:11:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 05:11:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-04-01 05:11:23,464 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 11 [2023-04-01 05:11:23,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:23,464 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-04-01 05:11:23,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:11:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-04-01 05:11:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 05:11:23,465 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:23,465 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:23,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:11:23,466 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:23,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1662799058, now seen corresponding path program 1 times [2023-04-01 05:11:23,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:23,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397079495] [2023-04-01 05:11:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:23,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:23,477 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:23,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523768320] [2023-04-01 05:11:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:23,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:23,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:23,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:11:23,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:11:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:23,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 05:11:23,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:11:23,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:11:23,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:23,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397079495] [2023-04-01 05:11:23,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:23,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523768320] [2023-04-01 05:11:23,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523768320] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:23,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1526373578] [2023-04-01 05:11:23,960 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 05:11:23,961 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:23,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:23,968 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:23,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:24,054 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:24,347 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-01 05:11:24,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:24,366 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:24,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1526373578] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:11:24,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:24,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 7] total 22 [2023-04-01 05:11:24,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842671718] [2023-04-01 05:11:24,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:11:24,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:11:24,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:24,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:11:24,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:11:24,727 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 05:11:25,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:25,196 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2023-04-01 05:11:25,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:11:25,196 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-04-01 05:11:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:25,197 INFO L225 Difference]: With dead ends: 53 [2023-04-01 05:11:25,198 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 05:11:25,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-04-01 05:11:25,199 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:25,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 36 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:11:25,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 05:11:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-04-01 05:11:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 05:11:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-04-01 05:11:25,211 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 16 [2023-04-01 05:11:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:25,212 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-04-01 05:11:25,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 05:11:25,212 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-04-01 05:11:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 05:11:25,213 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:25,213 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:25,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:11:25,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:25,419 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:25,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1441032967, now seen corresponding path program 1 times [2023-04-01 05:11:25,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:25,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575984030] [2023-04-01 05:11:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:25,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:25,435 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:25,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933670842] [2023-04-01 05:11:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:25,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:25,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:11:25,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:11:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:25,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 05:11:25,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 05:11:25,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 05:11:25,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:25,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575984030] [2023-04-01 05:11:25,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:25,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933670842] [2023-04-01 05:11:25,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933670842] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:25,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [899095182] [2023-04-01 05:11:25,662 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 05:11:25,662 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:25,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:25,663 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:25,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:25,709 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:27,486 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-01 05:11:27,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:27,499 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:27,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '929#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:27,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:27,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:27,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 05:11:27,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250697628] [2023-04-01 05:11:27,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:27,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:11:27,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:27,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:11:27,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-04-01 05:11:27,951 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 05:11:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:28,085 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2023-04-01 05:11:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:11:28,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 44 [2023-04-01 05:11:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:28,086 INFO L225 Difference]: With dead ends: 111 [2023-04-01 05:11:28,087 INFO L226 Difference]: Without dead ends: 95 [2023-04-01 05:11:28,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-04-01 05:11:28,088 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 51 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:28,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 147 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:11:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-01 05:11:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2023-04-01 05:11:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 41 states have (on average 1.170731707317073) internal successors, (48), 44 states have internal predecessors, (48), 40 states have call successors, (40), 10 states have call predecessors, (40), 9 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-04-01 05:11:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2023-04-01 05:11:28,107 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 44 [2023-04-01 05:11:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:28,107 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2023-04-01 05:11:28,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 05:11:28,108 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2023-04-01 05:11:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 05:11:28,108 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:28,109 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:28,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 05:11:28,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:28,322 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:28,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:28,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1933148283, now seen corresponding path program 1 times [2023-04-01 05:11:28,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:28,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274803354] [2023-04-01 05:11:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:28,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:28,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:28,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402291032] [2023-04-01 05:11:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:28,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:28,346 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:11:28,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:11:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:28,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 05:11:28,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 05:11:28,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 05:11:28,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:28,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274803354] [2023-04-01 05:11:28,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:28,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402291032] [2023-04-01 05:11:28,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402291032] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:28,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1304281452] [2023-04-01 05:11:28,649 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 05:11:28,649 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:28,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:28,650 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:28,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:28,675 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:29,753 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-01 05:11:29,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:29,768 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:30,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1542#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:30,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:30,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:30,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-04-01 05:11:30,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238334613] [2023-04-01 05:11:30,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:30,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 05:11:30,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:30,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 05:11:30,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-04-01 05:11:30,294 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 05:11:30,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:30,786 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2023-04-01 05:11:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:11:30,787 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 44 [2023-04-01 05:11:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:30,788 INFO L225 Difference]: With dead ends: 109 [2023-04-01 05:11:30,788 INFO L226 Difference]: Without dead ends: 107 [2023-04-01 05:11:30,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:11:30,789 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:30,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 98 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 05:11:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-01 05:11:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-04-01 05:11:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 56 states have internal predecessors, (60), 40 states have call successors, (40), 14 states have call predecessors, (40), 13 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-04-01 05:11:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 136 transitions. [2023-04-01 05:11:30,812 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 136 transitions. Word has length 44 [2023-04-01 05:11:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:30,813 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 136 transitions. [2023-04-01 05:11:30,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 05:11:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 136 transitions. [2023-04-01 05:11:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 05:11:30,814 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:30,814 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:30,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 05:11:31,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:31,020 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:31,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:31,021 INFO L85 PathProgramCache]: Analyzing trace with hash -82151627, now seen corresponding path program 2 times [2023-04-01 05:11:31,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:31,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928828481] [2023-04-01 05:11:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:31,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:31,031 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:31,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788501619] [2023-04-01 05:11:31,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:11:31,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:31,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:31,037 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:11:31,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 05:11:31,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 05:11:31,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:31,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 05:11:31,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 05:11:31,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 05:11:31,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:31,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928828481] [2023-04-01 05:11:31,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:31,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788501619] [2023-04-01 05:11:31,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788501619] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:31,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35468249] [2023-04-01 05:11:31,245 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 05:11:31,245 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:31,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:31,246 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:31,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:31,265 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:32,266 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-01 05:11:32,274 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:32,277 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:32,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2197#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:32,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:32,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:32,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-01 05:11:32,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92887140] [2023-04-01 05:11:32,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:32,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:11:32,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:32,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:11:32,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:11:32,745 INFO L87 Difference]: Start difference. First operand 107 states and 136 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 05:11:32,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:32,909 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2023-04-01 05:11:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:11:32,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 49 [2023-04-01 05:11:32,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:32,911 INFO L225 Difference]: With dead ends: 121 [2023-04-01 05:11:32,911 INFO L226 Difference]: Without dead ends: 119 [2023-04-01 05:11:32,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-01 05:11:32,912 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:32,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 176 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:11:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-04-01 05:11:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-04-01 05:11:32,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 65 states have internal predecessors, (69), 40 states have call successors, (40), 17 states have call predecessors, (40), 16 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-04-01 05:11:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 145 transitions. [2023-04-01 05:11:32,935 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 145 transitions. Word has length 49 [2023-04-01 05:11:32,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:32,935 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 145 transitions. [2023-04-01 05:11:32,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 05:11:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 145 transitions. [2023-04-01 05:11:32,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 05:11:32,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:32,937 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:32,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 05:11:33,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:33,143 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:33,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1692777595, now seen corresponding path program 3 times [2023-04-01 05:11:33,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:33,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974944211] [2023-04-01 05:11:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:33,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:33,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:33,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468327286] [2023-04-01 05:11:33,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:11:33,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:33,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:33,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:11:33,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 05:11:33,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:11:33,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:33,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 05:11:33,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-01 05:11:33,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-01 05:11:33,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:33,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974944211] [2023-04-01 05:11:33,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:33,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468327286] [2023-04-01 05:11:33,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468327286] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:33,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2051927594] [2023-04-01 05:11:33,968 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 05:11:33,968 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:33,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:33,969 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:33,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:33,985 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:34,802 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:11:34,805 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:34,809 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:35,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2909#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:35,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:35,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:35,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-04-01 05:11:35,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867469294] [2023-04-01 05:11:35,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:35,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 05:11:35,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 05:11:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-04-01 05:11:35,477 INFO L87 Difference]: Start difference. First operand 119 states and 145 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2023-04-01 05:11:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:35,948 INFO L93 Difference]: Finished difference Result 145 states and 167 transitions. [2023-04-01 05:11:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:11:35,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 54 [2023-04-01 05:11:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:35,950 INFO L225 Difference]: With dead ends: 145 [2023-04-01 05:11:35,951 INFO L226 Difference]: Without dead ends: 134 [2023-04-01 05:11:35,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2023-04-01 05:11:35,952 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:35,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 85 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 05:11:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-04-01 05:11:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-04-01 05:11:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 80 states have (on average 1.0875) internal successors, (87), 83 states have internal predecessors, (87), 31 states have call successors, (31), 23 states have call predecessors, (31), 22 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-04-01 05:11:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2023-04-01 05:11:35,982 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 54 [2023-04-01 05:11:35,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:35,983 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2023-04-01 05:11:35,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2023-04-01 05:11:35,983 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2023-04-01 05:11:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 05:11:35,984 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:35,984 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:35,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 05:11:36,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:36,189 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:36,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:36,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1446194315, now seen corresponding path program 1 times [2023-04-01 05:11:36,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:36,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250930692] [2023-04-01 05:11:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:36,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:36,198 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:36,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100053087] [2023-04-01 05:11:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:36,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:36,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:36,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:11:36,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 05:11:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:36,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 05:11:36,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-04-01 05:11:36,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:36,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:36,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250930692] [2023-04-01 05:11:36,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:36,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100053087] [2023-04-01 05:11:36,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100053087] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:11:36,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [807933348] [2023-04-01 05:11:36,601 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 05:11:36,602 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:36,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:36,602 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:36,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:36,620 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:37,640 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2023-04-01 05:11:37,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:37,648 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:38,209 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3669#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:38,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:38,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:11:38,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-01 05:11:38,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654984171] [2023-04-01 05:11:38,210 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:38,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:11:38,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:38,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:11:38,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-04-01 05:11:38,212 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-01 05:11:38,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:38,413 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2023-04-01 05:11:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:11:38,414 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 70 [2023-04-01 05:11:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:38,415 INFO L225 Difference]: With dead ends: 140 [2023-04-01 05:11:38,415 INFO L226 Difference]: Without dead ends: 136 [2023-04-01 05:11:38,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:11:38,416 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:38,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 81 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:11:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-04-01 05:11:38,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-04-01 05:11:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 84 states have internal predecessors, (88), 31 states have call successors, (31), 24 states have call predecessors, (31), 22 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-04-01 05:11:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2023-04-01 05:11:38,444 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 70 [2023-04-01 05:11:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:38,448 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2023-04-01 05:11:38,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-01 05:11:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2023-04-01 05:11:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 05:11:38,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:38,456 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 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] [2023-04-01 05:11:38,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 05:11:38,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:38,662 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:38,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:38,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2131269829, now seen corresponding path program 1 times [2023-04-01 05:11:38,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:38,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77415166] [2023-04-01 05:11:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:38,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:38,670 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:38,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982544311] [2023-04-01 05:11:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:38,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:38,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:38,676 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:11:38,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 05:11:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:38,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 05:11:38,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-04-01 05:11:38,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:39,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:39,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77415166] [2023-04-01 05:11:39,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:39,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982544311] [2023-04-01 05:11:39,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982544311] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:11:39,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691881529] [2023-04-01 05:11:39,075 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:11:39,075 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:39,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:39,076 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:39,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:39,091 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:40,599 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2023-04-01 05:11:40,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:40,607 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:41,502 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4451#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:41,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:41,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:11:41,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-01 05:11:41,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947246981] [2023-04-01 05:11:41,503 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:41,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:11:41,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:41,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:11:41,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-04-01 05:11:41,504 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-01 05:11:41,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:41,677 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2023-04-01 05:11:41,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:11:41,677 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2023-04-01 05:11:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:41,679 INFO L225 Difference]: With dead ends: 138 [2023-04-01 05:11:41,679 INFO L226 Difference]: Without dead ends: 127 [2023-04-01 05:11:41,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 163 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:11:41,680 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:41,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 81 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:11:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-04-01 05:11:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-04-01 05:11:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 28 states have call successors, (28), 22 states have call predecessors, (28), 21 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 05:11:41,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 135 transitions. [2023-04-01 05:11:41,701 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 135 transitions. Word has length 75 [2023-04-01 05:11:41,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:41,701 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 135 transitions. [2023-04-01 05:11:41,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-01 05:11:41,702 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 135 transitions. [2023-04-01 05:11:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 05:11:41,702 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:41,702 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:41,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 05:11:41,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:41,905 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:41,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:41,906 INFO L85 PathProgramCache]: Analyzing trace with hash -794288980, now seen corresponding path program 4 times [2023-04-01 05:11:41,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:41,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917643114] [2023-04-01 05:11:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:41,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:41,917 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:41,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455132617] [2023-04-01 05:11:41,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:11:41,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:41,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:41,919 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:11:41,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 05:11:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:41,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 05:11:41,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 52 proven. 50 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-04-01 05:11:42,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 52 proven. 50 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-04-01 05:11:42,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:42,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917643114] [2023-04-01 05:11:42,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:42,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455132617] [2023-04-01 05:11:42,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455132617] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:42,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1010249160] [2023-04-01 05:11:42,468 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 05:11:42,468 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:42,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:42,468 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:42,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:42,497 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:43,447 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2023-04-01 05:11:43,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:43,456 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:44,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5326#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:44,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:44,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:44,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-04-01 05:11:44,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746006520] [2023-04-01 05:11:44,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:44,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 05:11:44,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:44,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 05:11:44,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:11:44,145 INFO L87 Difference]: Start difference. First operand 127 states and 135 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 10 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2023-04-01 05:11:46,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:11:48,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:11:48,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:48,219 INFO L93 Difference]: Finished difference Result 154 states and 175 transitions. [2023-04-01 05:11:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 05:11:48,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 10 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) Word has length 77 [2023-04-01 05:11:48,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:48,222 INFO L225 Difference]: With dead ends: 154 [2023-04-01 05:11:48,222 INFO L226 Difference]: Without dead ends: 152 [2023-04-01 05:11:48,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 05:11:48,224 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 76 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:48,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 135 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 356 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 05:11:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-04-01 05:11:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 129. [2023-04-01 05:11:48,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 80 states have (on average 1.05) internal successors, (84), 82 states have internal predecessors, (84), 26 states have call successors, (26), 23 states have call predecessors, (26), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-01 05:11:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2023-04-01 05:11:48,251 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 77 [2023-04-01 05:11:48,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:48,251 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2023-04-01 05:11:48,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 10 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2023-04-01 05:11:48,251 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2023-04-01 05:11:48,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 05:11:48,252 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:48,252 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:48,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 05:11:48,458 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,SelfDestructingSolverStorable10 [2023-04-01 05:11:48,458 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:48,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:48,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2010254942, now seen corresponding path program 2 times [2023-04-01 05:11:48,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:48,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998900358] [2023-04-01 05:11:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:48,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:48,469 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:48,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053281999] [2023-04-01 05:11:48,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:11:48,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:48,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:48,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:11:48,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 05:11:48,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:11:48,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:48,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 05:11:48,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 76 proven. 25 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-04-01 05:11:48,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 92 proven. 1 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2023-04-01 05:11:50,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998900358] [2023-04-01 05:11:50,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:50,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053281999] [2023-04-01 05:11:50,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053281999] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:50,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1915248058] [2023-04-01 05:11:50,064 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 05:11:50,065 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:50,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:50,065 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:50,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:50,086 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:50,862 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:11:50,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:50,869 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:53,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6368#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:53,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:53,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:53,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-04-01 05:11:53,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179121776] [2023-04-01 05:11:53,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:53,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 05:11:53,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:53,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 05:11:53,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:11:53,117 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2023-04-01 05:11:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:55,247 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2023-04-01 05:11:55,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 05:11:55,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 98 [2023-04-01 05:11:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:55,249 INFO L225 Difference]: With dead ends: 139 [2023-04-01 05:11:55,249 INFO L226 Difference]: Without dead ends: 137 [2023-04-01 05:11:55,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 259 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2023-04-01 05:11:55,250 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 18 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:55,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 91 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 05:11:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-04-01 05:11:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2023-04-01 05:11:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 86 states have internal predecessors, (87), 28 states have call successors, (28), 24 states have call predecessors, (28), 23 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2023-04-01 05:11:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 141 transitions. [2023-04-01 05:11:55,283 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 141 transitions. Word has length 98 [2023-04-01 05:11:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:55,284 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 141 transitions. [2023-04-01 05:11:55,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2023-04-01 05:11:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 141 transitions. [2023-04-01 05:11:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 05:11:55,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:55,285 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:55,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 05:11:55,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:55,491 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:55,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:55,492 INFO L85 PathProgramCache]: Analyzing trace with hash 884970994, now seen corresponding path program 2 times [2023-04-01 05:11:55,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:55,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294259550] [2023-04-01 05:11:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:55,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:55,500 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:55,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548348763] [2023-04-01 05:11:55,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:11:55,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:55,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:55,502 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:11:55,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 05:11:55,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:11:55,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:55,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-01 05:11:55,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 107 proven. 41 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-04-01 05:11:55,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:58,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:58,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294259550] [2023-04-01 05:11:58,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:58,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548348763] [2023-04-01 05:11:58,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548348763] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:11:58,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1753920751] [2023-04-01 05:11:58,429 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:11:58,429 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:58,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:58,430 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:58,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:58,456 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:59,216 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:11:59,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:59,225 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:12:00,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7232#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:12:00,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:12:00,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:12:00,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-01 05:12:00,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060336710] [2023-04-01 05:12:00,800 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:12:00,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 05:12:00,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:12:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 05:12:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=706, Unknown=1, NotChecked=0, Total=812 [2023-04-01 05:12:00,802 INFO L87 Difference]: Start difference. First operand 135 states and 141 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-01 05:12:01,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:12:01,133 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2023-04-01 05:12:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:12:01,135 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 103 [2023-04-01 05:12:01,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:12:01,136 INFO L225 Difference]: With dead ends: 147 [2023-04-01 05:12:01,136 INFO L226 Difference]: Without dead ends: 134 [2023-04-01 05:12:01,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 214 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=130, Invalid=861, Unknown=1, NotChecked=0, Total=992 [2023-04-01 05:12:01,137 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:12:01,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 132 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:12:01,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-04-01 05:12:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-04-01 05:12:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 83 states have (on average 1.036144578313253) internal successors, (86), 85 states have internal predecessors, (86), 27 states have call successors, (27), 24 states have call predecessors, (27), 23 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 05:12:01,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2023-04-01 05:12:01,167 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 103 [2023-04-01 05:12:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:12:01,167 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2023-04-01 05:12:01,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-01 05:12:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2023-04-01 05:12:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 05:12:01,168 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:12:01,168 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:12:01,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 05:12:01,370 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,SelfDestructingSolverStorable12 [2023-04-01 05:12:01,370 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:12:01,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:12:01,370 INFO L85 PathProgramCache]: Analyzing trace with hash -689366782, now seen corresponding path program 2 times [2023-04-01 05:12:01,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:12:01,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180981562] [2023-04-01 05:12:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:12:01,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:12:01,379 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:12:01,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205755151] [2023-04-01 05:12:01,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:12:01,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:12:01,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:12:01,381 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:12:01,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 05:12:01,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-04-01 05:12:01,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:12:01,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 05:12:01,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:12:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-04-01 05:12:01,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:12:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-04-01 05:12:01,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:12:01,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180981562] [2023-04-01 05:12:01,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:12:01,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205755151] [2023-04-01 05:12:01,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205755151] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:12:01,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1535234270] [2023-04-01 05:12:01,799 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 05:12:01,799 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:12:01,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:12:01,800 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:12:01,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:12:01,813 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:12:02,515 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:12:02,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:12:02,520 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:12:02,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8421#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:12:02,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:12:02,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:12:02,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2023-04-01 05:12:02,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828280899] [2023-04-01 05:12:02,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:12:02,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:12:02,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:12:02,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:12:02,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-04-01 05:12:02,786 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2023-04-01 05:12:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:12:02,928 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2023-04-01 05:12:02,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 05:12:02,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) Word has length 128 [2023-04-01 05:12:02,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:12:02,929 INFO L225 Difference]: With dead ends: 188 [2023-04-01 05:12:02,929 INFO L226 Difference]: Without dead ends: 173 [2023-04-01 05:12:02,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 350 SyntacticMatches, 15 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-04-01 05:12:02,930 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:12:02,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 106 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:12:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-04-01 05:12:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2023-04-01 05:12:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 108 states have internal predecessors, (110), 35 states have call successors, (35), 31 states have call predecessors, (35), 29 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-04-01 05:12:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 177 transitions. [2023-04-01 05:12:02,972 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 177 transitions. Word has length 128 [2023-04-01 05:12:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:12:02,973 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 177 transitions. [2023-04-01 05:12:02,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2023-04-01 05:12:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 177 transitions. [2023-04-01 05:12:02,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 05:12:02,979 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:12:02,979 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:12:02,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 05:12:03,186 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,SelfDestructingSolverStorable13 [2023-04-01 05:12:03,186 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:12:03,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:12:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash -810345431, now seen corresponding path program 3 times [2023-04-01 05:12:03,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:12:03,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078616318] [2023-04-01 05:12:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:12:03,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:12:03,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:12:03,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563678211] [2023-04-01 05:12:03,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:12:03,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:12:03,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:12:03,209 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:12:03,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 05:12:04,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:12:04,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:12:04,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-01 05:12:04,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:12:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 115 proven. 132 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2023-04-01 05:12:04,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:12:04,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:12:04,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078616318] [2023-04-01 05:12:04,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:12:04,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563678211] [2023-04-01 05:12:04,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563678211] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:12:04,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667826270] [2023-04-01 05:12:04,901 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:12:04,901 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:12:04,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:12:04,901 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:12:04,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:12:04,917 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:12:05,745 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:12:05,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:12:05,750 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:12:06,250 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9487#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:12:06,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:12:06,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:12:06,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-04-01 05:12:06,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132447049] [2023-04-01 05:12:06,251 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:12:06,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:12:06,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:12:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:12:06,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2023-04-01 05:12:06,253 INFO L87 Difference]: Start difference. First operand 171 states and 177 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 05:12:08,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:12:10,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:12:12,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:12:14,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:12:17,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:12:17,016 INFO L93 Difference]: Finished difference Result 178 states and 183 transitions. [2023-04-01 05:12:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:12:17,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 131 [2023-04-01 05:12:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:12:17,021 INFO L225 Difference]: With dead ends: 178 [2023-04-01 05:12:17,021 INFO L226 Difference]: Without dead ends: 156 [2023-04-01 05:12:17,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 267 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2023-04-01 05:12:17,022 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 18 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-04-01 05:12:17,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 77 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 178 Invalid, 4 Unknown, 0 Unchecked, 10.7s Time] [2023-04-01 05:12:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-04-01 05:12:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2023-04-01 05:12:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 99 states have internal predecessors, (100), 30 states have call successors, (30), 28 states have call predecessors, (30), 27 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-01 05:12:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2023-04-01 05:12:17,052 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 131 [2023-04-01 05:12:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:12:17,052 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2023-04-01 05:12:17,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 05:12:17,053 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2023-04-01 05:12:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-04-01 05:12:17,054 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:12:17,054 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:12:17,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 05:12:17,254 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,SelfDestructingSolverStorable14 [2023-04-01 05:12:17,254 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:12:17,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:12:17,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1970721109, now seen corresponding path program 3 times [2023-04-01 05:12:17,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:12:17,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969811821] [2023-04-01 05:12:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:12:17,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:12:17,266 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:12:17,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963800962] [2023-04-01 05:12:17,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:12:17,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:12:17,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:12:17,268 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) [2023-04-01 05:12:17,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 05:12:17,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:12:17,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-04-01 05:12:17,343 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 05:12:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 05:12:17,435 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 05:12:17,436 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 05:12:17,437 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 05:12:17,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 05:12:17,644 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,SelfDestructingSolverStorable15 [2023-04-01 05:12:17,647 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 3, 2, 1, 1, 1, 1] [2023-04-01 05:12:17,650 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 05:12:17,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 05:12:17 BoogieIcfgContainer [2023-04-01 05:12:17,694 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 05:12:17,695 INFO L158 Benchmark]: Toolchain (without parser) took 55902.36ms. Allocated memory was 266.3MB in the beginning and 558.9MB in the end (delta: 292.6MB). Free memory was 234.1MB in the beginning and 451.5MB in the end (delta: -217.4MB). Peak memory consumption was 76.5MB. Max. memory is 8.0GB. [2023-04-01 05:12:17,695 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 178.3MB. Free memory was 124.0MB in the beginning and 123.8MB in the end (delta: 188.9kB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 05:12:17,695 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.29ms. Allocated memory is still 266.3MB. Free memory was 234.1MB in the beginning and 222.8MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-01 05:12:17,695 INFO L158 Benchmark]: Boogie Preprocessor took 38.76ms. Allocated memory is still 266.3MB. Free memory was 222.8MB in the beginning and 221.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-01 05:12:17,696 INFO L158 Benchmark]: RCFGBuilder took 326.49ms. Allocated memory is still 266.3MB. Free memory was 221.3MB in the beginning and 208.1MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-04-01 05:12:17,697 INFO L158 Benchmark]: TraceAbstraction took 55259.23ms. Allocated memory was 266.3MB in the beginning and 558.9MB in the end (delta: 292.6MB). Free memory was 207.6MB in the beginning and 451.5MB in the end (delta: -243.8MB). Peak memory consumption was 50.3MB. Max. memory is 8.0GB. [2023-04-01 05:12:17,698 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 178.3MB. Free memory was 124.0MB in the beginning and 123.8MB in the end (delta: 188.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 271.29ms. Allocated memory is still 266.3MB. Free memory was 234.1MB in the beginning and 222.8MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.76ms. Allocated memory is still 266.3MB. Free memory was 222.8MB in the beginning and 221.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 326.49ms. Allocated memory is still 266.3MB. Free memory was 221.3MB in the beginning and 208.1MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 55259.23ms. Allocated memory was 266.3MB in the beginning and 558.9MB in the end (delta: 292.6MB). Free memory was 207.6MB in the beginning and 451.5MB in the end (delta: -243.8MB). Peak memory consumption was 50.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_ushort() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [\old(counter)=0, a=5, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter++=0, counter=1, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter++=1, counter=2, n=1, x=1, y=7, z=12] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=2, n=2, x=8, y=19, z=18] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter++=2, counter=3, n=2, x=8, y=19, z=18] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=3, n=3, x=27, y=37, z=24] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter++=3, counter=4, n=3, x=27, y=37, z=24] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=4, n=4, x=64, y=61, z=30] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter++=4, counter=5, n=4, x=64, y=61, z=30] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=5, n=5, x=125, y=91, z=36] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter++=5, counter=6, n=5, x=125, y=91, z=36] [L33] COND FALSE !(counter++<5) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [\old(counter)=0, a=5, counter=6, n=5, x=125, y=91, z=36] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 55.1s, OverallIterations: 16, TraceHistogramMax: 27, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 19.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 286 SdHoareTripleChecker+Valid, 18.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 241 mSDsluCounter, 1448 SdHoareTripleChecker+Invalid, 17.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 999 mSDsCounter, 348 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2577 IncrementalHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 348 mSolverCounterUnsat, 449 mSDtfsCounter, 2577 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2504 GetRequests, 2105 SyntacticMatches, 72 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2867 ImplicationChecksByTransitivity, 14.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=14, InterpolantAutomatonStates: 135, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 31 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 1077 NumberOfCodeBlocks, 910 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1408 ConstructedInterpolants, 0 QuantifiedInterpolants, 6041 SizeOfPredicates, 41 NumberOfNonLiveVariables, 2011 ConjunctsInSsa, 308 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 5301/6502 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 14, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 12, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 8, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 24, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 41, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 5, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 14, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 80, DAG_COMPRESSION_RETAINED_NODES: 49, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-01 05:12:17,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...