/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:21:02,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:21:02,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:21:02,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:21:02,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:21:02,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:21:02,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:21:02,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:21:02,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:21:02,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:21:02,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:21:02,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:21:02,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:21:03,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:21:03,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:21:03,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:21:03,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:21:03,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:21:03,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:21:03,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:21:03,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:21:03,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:21:03,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:21:03,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:21:03,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:21:03,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:21:03,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:21:03,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:21:03,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:21:03,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:21:03,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:21:03,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:21:03,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:21:03,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:21:03,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:21:03,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:21:03,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:21:03,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:21:03,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:21:03,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:21:03,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:21:03,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 23:21:03,062 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:21:03,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:21:03,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:21:03,063 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:21:03,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:21:03,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:21:03,064 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:21:03,064 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:21:03,064 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:21:03,064 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:21:03,065 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:21:03,065 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:21:03,065 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:21:03,065 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:21:03,066 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:21:03,066 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:21:03,066 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:21:03,066 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:21:03,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:21:03,067 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:21:03,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:21:03,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:21:03,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:21:03,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:21:03,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:21:03,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:21:03,068 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:21:03,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:21:03,068 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:21:03,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:21:03,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:21:03,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:21:03,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:21:03,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:21:03,069 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:21:03,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:21:03,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:21:03,069 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:21:03,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:21:03,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:21:03,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:21:03,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:21:03,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:21:03,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:21:03,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:21:03,347 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:21:03,347 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:21:03,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2023-03-31 23:21:04,430 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:21:04,693 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:21:04,694 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c [2023-03-31 23:21:04,699 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/995796b26/a376a9d266844f279300afa93c727db5/FLAG210909f7a [2023-03-31 23:21:04,710 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/995796b26/a376a9d266844f279300afa93c727db5 [2023-03-31 23:21:04,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:21:04,713 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:21:04,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:21:04,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:21:04,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:21:04,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:21:04" (1/1) ... [2023-03-31 23:21:04,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5273a46d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:21:04, skipping insertion in model container [2023-03-31 23:21:04,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:21:04" (1/1) ... [2023-03-31 23:21:04,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:21:04,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:21:04,840 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c[537,550] [2023-03-31 23:21:04,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:21:04,873 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:21:04,884 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound5.c[537,550] [2023-03-31 23:21:04,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:21:04,914 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:21:04,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:21:04 WrapperNode [2023-03-31 23:21:04,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:21:04,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:21:04,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:21:04,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:21:04,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:21:04" (1/1) ... [2023-03-31 23:21:04,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:21:04" (1/1) ... [2023-03-31 23:21:04,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:21:04" (1/1) ... [2023-03-31 23:21:04,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:21:04" (1/1) ... [2023-03-31 23:21:04,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:21:04" (1/1) ... [2023-03-31 23:21:04,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:21:04" (1/1) ... [2023-03-31 23:21:04,937 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:21:04" (1/1) ... [2023-03-31 23:21:04,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:21:04" (1/1) ... [2023-03-31 23:21:04,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:21:04,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:21:04,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:21:04,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:21:04,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:21:04" (1/1) ... [2023-03-31 23:21:04,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:21:04,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:21:04,971 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 23:21:04,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 23:21:05,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:21:05,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:21:05,003 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:21:05,003 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:21:05,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:21:05,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:21:05,003 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:21:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:21:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:21:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:21:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 23:21:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:21:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:21:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:21:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:21:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:21:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:21:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:21:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:21:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:21:05,059 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:21:05,061 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:21:05,199 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:21:05,231 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:21:05,232 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 23:21:05,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:21:05 BoogieIcfgContainer [2023-03-31 23:21:05,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:21:05,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:21:05,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:21:05,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:21:05,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:21:04" (1/3) ... [2023-03-31 23:21:05,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3964454c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:21:05, skipping insertion in model container [2023-03-31 23:21:05,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:21:04" (2/3) ... [2023-03-31 23:21:05,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3964454c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:21:05, skipping insertion in model container [2023-03-31 23:21:05,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:21:05" (3/3) ... [2023-03-31 23:21:05,242 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound5.c [2023-03-31 23:21:05,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:21:05,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:21:05,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:21:05,304 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;@25785041, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:21:05,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:21:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:21:05,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 23:21:05,314 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:21:05,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:21:05,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:21:05,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:21:05,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1281912795, now seen corresponding path program 1 times [2023-03-31 23:21:05,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:21:05,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288885207] [2023-03-31 23:21:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:05,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:21:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:21:05,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:21:05,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288885207] [2023-03-31 23:21:05,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 23:21:05,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240027234] [2023-03-31 23:21:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:05,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:21:05,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:21:05,492 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:21:05,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:21:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:21:05,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 23:21:05,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:21:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:21:05,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:21:05,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240027234] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:21:05,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:21:05,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 23:21:05,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436158328] [2023-03-31 23:21:05,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:21:05,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 23:21:05,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:21:05,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 23:21:05,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:21:05,666 INFO L87 Difference]: Start difference. First operand has 32 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 23:21:05,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:21:05,727 INFO L93 Difference]: Finished difference Result 55 states and 86 transitions. [2023-03-31 23:21:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 23:21:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-03-31 23:21:05,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:21:05,739 INFO L225 Difference]: With dead ends: 55 [2023-03-31 23:21:05,739 INFO L226 Difference]: Without dead ends: 28 [2023-03-31 23:21:05,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:21:05,744 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:21:05,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:21:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-31 23:21:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-03-31 23:21:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 23:21:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-03-31 23:21:05,790 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 15 [2023-03-31 23:21:05,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:21:05,791 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-03-31 23:21:05,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 23:21:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-03-31 23:21:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 23:21:05,792 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:21:05,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:21:05,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:21:05,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 23:21:05,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:21:06,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:21:06,000 INFO L85 PathProgramCache]: Analyzing trace with hash 819854385, now seen corresponding path program 1 times [2023-03-31 23:21:06,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:21:06,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360396882] [2023-03-31 23:21:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:06,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:21:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:21:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:21:06,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:21:06,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360396882] [2023-03-31 23:21:06,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360396882] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:21:06,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:21:06,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:21:06,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684144740] [2023-03-31 23:21:06,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:21:06,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:21:06,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:21:06,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:21:06,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:21:06,291 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 23:21:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:21:06,375 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-03-31 23:21:06,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:21:06,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-03-31 23:21:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:21:06,377 INFO L225 Difference]: With dead ends: 41 [2023-03-31 23:21:06,377 INFO L226 Difference]: Without dead ends: 39 [2023-03-31 23:21:06,377 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 [2023-03-31 23:21:06,378 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:21:06,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 101 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:21:06,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-03-31 23:21:06,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2023-03-31 23:21:06,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 23:21:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-03-31 23:21:06,388 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 15 [2023-03-31 23:21:06,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:21:06,389 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-03-31 23:21:06,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 23:21:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-03-31 23:21:06,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 23:21:06,390 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:21:06,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:21:06,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:21:06,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:21:06,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:21:06,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1158906488, now seen corresponding path program 1 times [2023-03-31 23:21:06,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:21:06,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938645148] [2023-03-31 23:21:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:06,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:21:06,412 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:21:06,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558912267] [2023-03-31 23:21:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:06,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:21:06,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:21:06,414 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:21:06,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:21:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:21:06,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 23:21:06,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:21:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:21:06,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:21:06,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:21:06,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938645148] [2023-03-31 23:21:06,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:21:06,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558912267] [2023-03-31 23:21:06,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558912267] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:21:06,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:21:06,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:21:06,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906109664] [2023-03-31 23:21:06,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:21:06,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:21:06,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:21:06,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:21:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:21:06,543 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 23:21:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:21:06,587 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2023-03-31 23:21:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 23:21:06,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-03-31 23:21:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:21:06,589 INFO L225 Difference]: With dead ends: 47 [2023-03-31 23:21:06,589 INFO L226 Difference]: Without dead ends: 34 [2023-03-31 23:21:06,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:21:06,592 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:21:06,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:21:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-31 23:21:06,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-03-31 23:21:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 23:21:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-03-31 23:21:06,599 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 17 [2023-03-31 23:21:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:21:06,600 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-03-31 23:21:06,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 23:21:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-03-31 23:21:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 23:21:06,600 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:21:06,600 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:21:06,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:21:06,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-31 23:21:06,807 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:21:06,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:21:06,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1070508052, now seen corresponding path program 1 times [2023-03-31 23:21:06,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:21:06,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546261882] [2023-03-31 23:21:06,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:06,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:21:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:21:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:21:06,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:21:06,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546261882] [2023-03-31 23:21:06,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546261882] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:21:06,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:21:06,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:21:06,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221444704] [2023-03-31 23:21:06,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:21:06,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:21:06,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:21:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:21:06,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:21:06,960 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 23:21:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:21:07,028 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2023-03-31 23:21:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:21:07,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2023-03-31 23:21:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:21:07,032 INFO L225 Difference]: With dead ends: 47 [2023-03-31 23:21:07,032 INFO L226 Difference]: Without dead ends: 45 [2023-03-31 23:21:07,033 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 [2023-03-31 23:21:07,035 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:21:07,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 101 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:21:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-03-31 23:21:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2023-03-31 23:21:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 23:21:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-03-31 23:21:07,045 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 20 [2023-03-31 23:21:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:21:07,046 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-03-31 23:21:07,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 23:21:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-03-31 23:21:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 23:21:07,046 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:21:07,047 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:21:07,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 23:21:07,047 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:21:07,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:21:07,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1460275665, now seen corresponding path program 1 times [2023-03-31 23:21:07,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:21:07,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330145714] [2023-03-31 23:21:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:07,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:21:07,068 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:21:07,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907345522] [2023-03-31 23:21:07,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:07,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:21:07,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:21:07,072 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:21:07,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:21:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:21:07,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2023-03-31 23:21:07,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:21:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:21:07,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:21:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:21:07,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:21:07,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330145714] [2023-03-31 23:21:07,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:21:07,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907345522] [2023-03-31 23:21:07,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907345522] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:21:07,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1534544098] [2023-03-31 23:21:07,557 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-03-31 23:21:07,558 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:21:07,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:21:07,565 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:21:07,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:21:07,635 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:21:07,830 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-03-31 23:21:07,857 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 23:21:07,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:21:07,877 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:21:08,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '794#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= ~counter~0 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:21:08,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:21:08,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:21:08,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-03-31 23:21:08,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039164558] [2023-03-31 23:21:08,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:21:08,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 23:21:08,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:21:08,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 23:21:08,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-03-31 23:21:08,433 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-31 23:21:10,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 23:21:13,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 23:21:15,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 23:21:17,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 23:21:19,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 23:21:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:21:20,301 INFO L93 Difference]: Finished difference Result 81 states and 108 transitions. [2023-03-31 23:21:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 23:21:20,302 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) Word has length 25 [2023-03-31 23:21:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:21:20,304 INFO L225 Difference]: With dead ends: 81 [2023-03-31 23:21:20,304 INFO L226 Difference]: Without dead ends: 67 [2023-03-31 23:21:20,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2023-03-31 23:21:20,306 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 32 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-03-31 23:21:20,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 132 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 206 Invalid, 5 Unknown, 0 Unchecked, 11.8s Time] [2023-03-31 23:21:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-03-31 23:21:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-03-31 23:21:20,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 21 states have call successors, (21), 8 states have call predecessors, (21), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2023-03-31 23:21:20,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2023-03-31 23:21:20,323 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 25 [2023-03-31 23:21:20,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:21:20,324 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2023-03-31 23:21:20,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-31 23:21:20,324 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2023-03-31 23:21:20,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 23:21:20,325 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:21:20,325 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:21:20,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:21:20,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:21:20,526 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:21:20,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:21:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1142294395, now seen corresponding path program 1 times [2023-03-31 23:21:20,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:21:20,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262555067] [2023-03-31 23:21:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:20,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:21:20,552 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:21:20,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635171510] [2023-03-31 23:21:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:20,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:21:20,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:21:20,558 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:21:20,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:21:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:21:20,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 23:21:20,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:21:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:21:20,666 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:21:20,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:21:20,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262555067] [2023-03-31 23:21:20,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:21:20,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635171510] [2023-03-31 23:21:20,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635171510] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:21:20,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:21:20,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:21:20,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365817472] [2023-03-31 23:21:20,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:21:20,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:21:20,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:21:20,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:21:20,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:21:20,669 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 23:21:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:21:20,710 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2023-03-31 23:21:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:21:20,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2023-03-31 23:21:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:21:20,714 INFO L225 Difference]: With dead ends: 80 [2023-03-31 23:21:20,714 INFO L226 Difference]: Without dead ends: 73 [2023-03-31 23:21:20,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:21:20,716 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:21:20,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 105 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:21:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-03-31 23:21:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-03-31 23:21:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 46 states have internal predecessors, (50), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2023-03-31 23:21:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2023-03-31 23:21:20,758 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 33 [2023-03-31 23:21:20,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:21:20,758 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2023-03-31 23:21:20,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 23:21:20,759 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2023-03-31 23:21:20,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 23:21:20,760 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:21:20,760 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:21:20,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:21:20,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:21:20,966 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:21:20,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:21:20,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1140566517, now seen corresponding path program 1 times [2023-03-31 23:21:20,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:21:20,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423716086] [2023-03-31 23:21:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:20,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:21:20,975 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:21:20,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511797138] [2023-03-31 23:21:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:20,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:21:20,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:21:20,976 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:21:20,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:21:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:21:21,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-31 23:21:21,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:21:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:21:21,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:21:21,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:21:21,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423716086] [2023-03-31 23:21:21,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:21:21,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511797138] [2023-03-31 23:21:21,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511797138] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:21:21,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:21:21,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:21:21,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836025796] [2023-03-31 23:21:21,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:21:21,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:21:21,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:21:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:21:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:21:21,165 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 23:21:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:21:21,824 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2023-03-31 23:21:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:21:21,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2023-03-31 23:21:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:21:21,826 INFO L225 Difference]: With dead ends: 79 [2023-03-31 23:21:21,826 INFO L226 Difference]: Without dead ends: 67 [2023-03-31 23:21:21,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-03-31 23:21:21,827 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 23:21:21,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 108 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 23:21:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-03-31 23:21:21,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-03-31 23:21:21,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-03-31 23:21:21,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2023-03-31 23:21:21,836 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 33 [2023-03-31 23:21:21,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:21:21,836 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2023-03-31 23:21:21,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 23:21:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2023-03-31 23:21:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 23:21:21,837 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:21:21,837 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:21:21,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:21:22,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:21:22,038 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:21:22,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:21:22,038 INFO L85 PathProgramCache]: Analyzing trace with hash -191139670, now seen corresponding path program 1 times [2023-03-31 23:21:22,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:21:22,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580675465] [2023-03-31 23:21:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:22,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:21:22,049 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:21:22,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882731199] [2023-03-31 23:21:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:22,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:21:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:21:22,051 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:21:22,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:21:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:21:22,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 23:21:22,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:21:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:21:22,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:21:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:21:22,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:21:22,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580675465] [2023-03-31 23:21:22,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:21:22,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882731199] [2023-03-31 23:21:22,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882731199] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:21:22,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1835981074] [2023-03-31 23:21:22,208 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:21:22,208 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:21:22,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:21:22,209 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:21:22,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:21:22,241 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:21:22,562 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-03-31 23:21:22,574 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 23:21:22,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:21:22,583 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:21:22,999 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1909#(and (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:21:23,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:21:23,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:21:23,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-03-31 23:21:23,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374295988] [2023-03-31 23:21:23,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:21:23,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:21:23,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:21:23,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:21:23,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-03-31 23:21:23,002 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-03-31 23:21:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:21:23,114 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2023-03-31 23:21:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 23:21:23,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 35 [2023-03-31 23:21:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:21:23,116 INFO L225 Difference]: With dead ends: 136 [2023-03-31 23:21:23,116 INFO L226 Difference]: Without dead ends: 115 [2023-03-31 23:21:23,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:21:23,117 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 36 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:21:23,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 116 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:21:23,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-03-31 23:21:23,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2023-03-31 23:21:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 72 states have internal predecessors, (80), 25 states have call successors, (25), 17 states have call predecessors, (25), 16 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-31 23:21:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2023-03-31 23:21:23,129 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 35 [2023-03-31 23:21:23,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:21:23,129 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2023-03-31 23:21:23,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-03-31 23:21:23,129 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2023-03-31 23:21:23,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-31 23:21:23,130 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:21:23,130 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:21:23,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 23:21:23,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:21:23,336 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:21:23,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:21:23,337 INFO L85 PathProgramCache]: Analyzing trace with hash -840800345, now seen corresponding path program 1 times [2023-03-31 23:21:23,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:21:23,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626631678] [2023-03-31 23:21:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:23,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:21:23,350 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:21:23,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980017775] [2023-03-31 23:21:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:23,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:21:23,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:21:23,353 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:21:23,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 23:21:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:21:23,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 23:21:23,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:21:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:21:23,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:21:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-03-31 23:21:23,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:21:23,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626631678] [2023-03-31 23:21:23,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:21:23,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980017775] [2023-03-31 23:21:23,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980017775] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:21:23,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [413056759] [2023-03-31 23:21:23,577 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:21:23,577 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:21:23,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:21:23,578 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:21:23,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:21:23,600 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:21:23,837 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-03-31 23:21:23,846 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 23:21:23,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:21:23,853 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:21:24,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2602#(and (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:21:24,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:21:24,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:21:24,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-03-31 23:21:24,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014811835] [2023-03-31 23:21:24,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:21:24,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:21:24,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:21:24,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:21:24,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-03-31 23:21:24,276 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2023-03-31 23:21:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:21:24,384 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2023-03-31 23:21:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 23:21:24,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 51 [2023-03-31 23:21:24,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:21:24,386 INFO L225 Difference]: With dead ends: 165 [2023-03-31 23:21:24,386 INFO L226 Difference]: Without dead ends: 151 [2023-03-31 23:21:24,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:21:24,387 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:21:24,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 121 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:21:24,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-03-31 23:21:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2023-03-31 23:21:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 91 states have (on average 1.1428571428571428) internal successors, (104), 96 states have internal predecessors, (104), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-03-31 23:21:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 168 transitions. [2023-03-31 23:21:24,402 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 168 transitions. Word has length 51 [2023-03-31 23:21:24,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:21:24,403 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 168 transitions. [2023-03-31 23:21:24,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2023-03-31 23:21:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 168 transitions. [2023-03-31 23:21:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-31 23:21:24,406 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:21:24,406 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:21:24,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 23:21:24,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:21:24,612 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:21:24,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:21:24,612 INFO L85 PathProgramCache]: Analyzing trace with hash -839072467, now seen corresponding path program 1 times [2023-03-31 23:21:24,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:21:24,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258648878] [2023-03-31 23:21:24,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:24,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:21:24,625 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:21:24,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303209226] [2023-03-31 23:21:24,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:21:24,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:21:24,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:21:24,631 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:21:24,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 23:21:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:21:24,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 29 conjunts are in the unsatisfiable core [2023-03-31 23:21:24,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:21:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 23:21:31,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:21:33,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:21:33,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258648878] [2023-03-31 23:21:33,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:21:33,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303209226] [2023-03-31 23:21:33,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303209226] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:21:33,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125642571] [2023-03-31 23:21:33,584 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:21:33,585 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:21:33,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:21:33,585 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:21:33,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:21:33,615 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:21:33,884 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-03-31 23:21:33,893 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 23:21:33,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:21:33,902 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:21:35,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3264#(and (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:21:35,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:21:35,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:21:35,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-03-31 23:21:35,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633710963] [2023-03-31 23:21:35,671 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:21:35,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 23:21:35,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:21:35,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 23:21:35,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=877, Unknown=1, NotChecked=0, Total=992 [2023-03-31 23:21:35,673 INFO L87 Difference]: Start difference. First operand 146 states and 168 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-03-31 23:21:45,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-03-31 23:21:48,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-03-31 23:21:50,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-03-31 23:21:52,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-03-31 23:21:54,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-03-31 23:21:58,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-03-31 23:22:00,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-03-31 23:22:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:00,684 INFO L93 Difference]: Finished difference Result 172 states and 201 transitions. [2023-03-31 23:22:00,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:22:00,684 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2023-03-31 23:22:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:00,687 INFO L225 Difference]: With dead ends: 172 [2023-03-31 23:22:00,687 INFO L226 Difference]: Without dead ends: 170 [2023-03-31 23:22:00,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=137, Invalid=1051, Unknown=2, NotChecked=0, Total=1190 [2023-03-31 23:22:00,689 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 19 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:00,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 146 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 260 Invalid, 6 Unknown, 0 Unchecked, 17.4s Time] [2023-03-31 23:22:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-03-31 23:22:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2023-03-31 23:22:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 104 states have (on average 1.1538461538461537) internal successors, (120), 110 states have internal predecessors, (120), 38 states have call successors, (38), 24 states have call predecessors, (38), 23 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2023-03-31 23:22:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 192 transitions. [2023-03-31 23:22:00,707 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 192 transitions. Word has length 51 [2023-03-31 23:22:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:00,707 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 192 transitions. [2023-03-31 23:22:00,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-03-31 23:22:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 192 transitions. [2023-03-31 23:22:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-03-31 23:22:00,708 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:00,708 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:00,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 23:22:00,917 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,SelfDestructingSolverStorable9 [2023-03-31 23:22:00,917 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:00,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:00,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1794758763, now seen corresponding path program 1 times [2023-03-31 23:22:00,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:00,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806426215] [2023-03-31 23:22:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:00,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:00,926 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:00,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626147509] [2023-03-31 23:22:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:00,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:00,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:00,928 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:22:00,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 23:22:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:01,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 30 conjunts are in the unsatisfiable core [2023-03-31 23:22:01,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 18 proven. 35 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-31 23:22:01,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:22:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-31 23:22:02,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:02,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806426215] [2023-03-31 23:22:02,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:02,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626147509] [2023-03-31 23:22:02,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626147509] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:22:02,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [822890212] [2023-03-31 23:22:02,239 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:22:02,239 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:22:02,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:22:02,239 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:22:02,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:22:02,255 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:22:02,455 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-03-31 23:22:02,464 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 23:22:02,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:22:02,470 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:22:03,353 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4159#(and (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:22:03,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:22:03,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:22:03,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2023-03-31 23:22:03,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055951812] [2023-03-31 23:22:03,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:22:03,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-31 23:22:03,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:03,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-31 23:22:03,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2023-03-31 23:22:03,355 INFO L87 Difference]: Start difference. First operand 166 states and 192 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2023-03-31 23:22:10,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 23:22:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:13,337 INFO L93 Difference]: Finished difference Result 199 states and 225 transitions. [2023-03-31 23:22:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:22:13,337 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) Word has length 61 [2023-03-31 23:22:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:13,339 INFO L225 Difference]: With dead ends: 199 [2023-03-31 23:22:13,339 INFO L226 Difference]: Without dead ends: 177 [2023-03-31 23:22:13,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 23:22:13,340 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 50 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:13,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 287 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2023-03-31 23:22:13,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-03-31 23:22:13,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2023-03-31 23:22:13,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 114 states have internal predecessors, (123), 35 states have call successors, (35), 26 states have call predecessors, (35), 25 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2023-03-31 23:22:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 190 transitions. [2023-03-31 23:22:13,366 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 190 transitions. Word has length 61 [2023-03-31 23:22:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:13,366 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 190 transitions. [2023-03-31 23:22:13,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2023-03-31 23:22:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 190 transitions. [2023-03-31 23:22:13,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-03-31 23:22:13,367 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:13,367 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:13,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 23:22:13,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:13,574 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:13,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash -309101988, now seen corresponding path program 1 times [2023-03-31 23:22:13,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:13,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317665582] [2023-03-31 23:22:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:13,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:13,582 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:13,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305823328] [2023-03-31 23:22:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:13,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:13,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:13,585 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:22:13,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process