/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:06:55,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:06:55,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:06:55,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:06:55,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:06:55,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:06:55,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:06:55,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:06:55,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:06:55,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:06:55,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:06:55,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:06:55,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:06:55,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:06:55,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:06:55,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:06:55,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:06:55,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:06:55,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:06:55,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:06:55,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:06:55,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:06:55,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:06:55,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:06:55,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:06:55,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:06:55,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:06:55,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:06:55,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:06:55,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:06:55,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:06:55,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:06:55,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:06:55,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:06:55,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:06:55,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:06:55,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:06:55,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:06:55,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:06:55,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:06:55,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:06:56,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 23:06:56,025 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:06:56,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:06:56,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:06:56,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:06:56,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:06:56,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:06:56,027 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:06:56,027 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:06:56,027 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:06:56,027 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:06:56,027 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:06:56,028 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:06:56,028 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:06:56,028 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:06:56,028 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:06:56,028 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:06:56,029 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:06:56,029 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:06:56,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:06:56,030 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:06:56,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:06:56,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:06:56,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:06:56,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:06:56,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:06:56,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:06:56,031 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:06:56,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:06:56,031 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:06:56,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:06:56,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:06:56,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:06:56,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:06:56,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:06:56,032 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:06:56,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:06:56,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:06:56,033 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:06:56,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:06:56,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:06:56,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:06:56,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:06:56,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:06:56,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:06:56,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:06:56,285 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:06:56,286 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:06:56,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c [2023-04-02 23:06:57,406 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:06:57,586 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:06:57,587 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c [2023-04-02 23:06:57,592 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d7950e5/237f055987b34d7082f51f96d20a6f60/FLAG8bfebe865 [2023-04-02 23:06:57,603 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d7950e5/237f055987b34d7082f51f96d20a6f60 [2023-04-02 23:06:57,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:06:57,607 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:06:57,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:06:57,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:06:57,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:06:57,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:06:57" (1/1) ... [2023-04-02 23:06:57,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fc0d242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:06:57, skipping insertion in model container [2023-04-02 23:06:57,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:06:57" (1/1) ... [2023-04-02 23:06:57,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:06:57,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:06:57,780 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_valuebound20.c[537,550] [2023-04-02 23:06:57,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:06:57,811 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:06:57,826 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_valuebound20.c[537,550] [2023-04-02 23:06:57,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:06:57,845 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:06:57,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:06:57 WrapperNode [2023-04-02 23:06:57,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:06:57,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:06:57,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:06:57,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:06:57,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:06:57" (1/1) ... [2023-04-02 23:06:57,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:06:57" (1/1) ... [2023-04-02 23:06:57,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:06:57" (1/1) ... [2023-04-02 23:06:57,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:06:57" (1/1) ... [2023-04-02 23:06:57,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:06:57" (1/1) ... [2023-04-02 23:06:57,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:06:57" (1/1) ... [2023-04-02 23:06:57,884 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:06:57" (1/1) ... [2023-04-02 23:06:57,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:06:57" (1/1) ... [2023-04-02 23:06:57,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:06:57,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:06:57,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:06:57,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:06:57,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:06:57" (1/1) ... [2023-04-02 23:06:57,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:06:57,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:06:57,912 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 23:06:57,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 23:06:57,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:06:57,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:06:57,948 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:06:57,948 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 23:06:57,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 23:06:57,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:06:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:06:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:06:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:06:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:06:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 23:06:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 23:06:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 23:06:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:06:57,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:06:57,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:06:57,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:06:57,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:06:57,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:06:57,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:06:58,021 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:06:58,023 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:06:58,233 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:06:58,266 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:06:58,266 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 23:06:58,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:06:58 BoogieIcfgContainer [2023-04-02 23:06:58,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:06:58,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:06:58,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:06:58,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:06:58,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:06:57" (1/3) ... [2023-04-02 23:06:58,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48611a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:06:58, skipping insertion in model container [2023-04-02 23:06:58,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:06:57" (2/3) ... [2023-04-02 23:06:58,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48611a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:06:58, skipping insertion in model container [2023-04-02 23:06:58,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:06:58" (3/3) ... [2023-04-02 23:06:58,275 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound20.c [2023-04-02 23:06:58,296 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:06:58,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:06:58,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:06:58,341 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;@370798b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:06:58,341 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:06:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 23:06:58,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 23:06:58,351 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:06:58,352 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:06:58,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:06:58,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:06:58,358 INFO L85 PathProgramCache]: Analyzing trace with hash -91855496, now seen corresponding path program 1 times [2023-04-02 23:06:58,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:06:58,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056667222] [2023-04-02 23:06:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:06:58,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:06:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:06:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:06:58,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:06:58,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056667222] [2023-04-02 23:06:58,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056667222] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:06:58,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:06:58,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:06:58,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143427467] [2023-04-02 23:06:58,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:06:58,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:06:58,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:06:58,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:06:58,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:06:58,841 INFO L87 Difference]: Start difference. First operand has 33 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 23:06:58,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:06:58,939 INFO L93 Difference]: Finished difference Result 66 states and 105 transitions. [2023-04-02 23:06:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:06:58,942 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2023-04-02 23:06:58,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:06:58,947 INFO L225 Difference]: With dead ends: 66 [2023-04-02 23:06:58,948 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 23:06:58,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:06:58,953 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:06:58,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 119 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:06:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 23:06:58,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2023-04-02 23:06:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 23:06:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-04-02 23:06:58,986 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2023-04-02 23:06:58,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:06:58,987 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-04-02 23:06:58,987 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 23:06:58,987 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-04-02 23:06:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 23:06:58,988 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:06:58,989 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:06:58,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:06:58,989 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:06:58,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:06:58,990 INFO L85 PathProgramCache]: Analyzing trace with hash -445599122, now seen corresponding path program 1 times [2023-04-02 23:06:58,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:06:58,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144847489] [2023-04-02 23:06:58,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:06:58,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:06:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:06:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:06:59,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:06:59,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144847489] [2023-04-02 23:06:59,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144847489] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:06:59,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:06:59,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:06:59,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874943163] [2023-04-02 23:06:59,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:06:59,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:06:59,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:06:59,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:06:59,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:06:59,270 INFO L87 Difference]: Start difference. First operand 33 states and 41 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 23:06:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:06:59,349 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2023-04-02 23:06:59,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:06:59,350 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2023-04-02 23:06:59,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:06:59,351 INFO L225 Difference]: With dead ends: 45 [2023-04-02 23:06:59,351 INFO L226 Difference]: Without dead ends: 43 [2023-04-02 23:06:59,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:06:59,352 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:06:59,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 106 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:06:59,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-02 23:06:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2023-04-02 23:06:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 23:06:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-04-02 23:06:59,361 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 26 [2023-04-02 23:06:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:06:59,362 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-04-02 23:06:59,362 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 23:06:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-04-02 23:06:59,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 23:06:59,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:06:59,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:06:59,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:06:59,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:06:59,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:06:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1862588680, now seen corresponding path program 1 times [2023-04-02 23:06:59,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:06:59,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613409241] [2023-04-02 23:06:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:06:59,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:06:59,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:06:59,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214091292] [2023-04-02 23:06:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:06:59,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:06:59,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:06:59,380 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:06:59,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:06:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:06:59,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 23:06:59,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:06:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 23:06:59,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:06:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 23:06:59,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:06:59,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613409241] [2023-04-02 23:06:59,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:06:59,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214091292] [2023-04-02 23:06:59,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214091292] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:06:59,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [515386526] [2023-04-02 23:06:59,834 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 23:06:59,835 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:06:59,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:06:59,841 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:06:59,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:06:59,897 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:07:00,091 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-02 23:07:00,096 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-04-02 23:07:00,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:07:00,104 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:07:00,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [515386526] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:07:00,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:07:00,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 7] total 22 [2023-04-02 23:07:00,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706320145] [2023-04-02 23:07:00,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:07:00,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 23:07:00,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:07:00,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 23:07:00,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-02 23:07:00,320 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 23:07:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:07:00,981 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2023-04-02 23:07:00,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:07:00,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 31 [2023-04-02 23:07:00,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:07:00,984 INFO L225 Difference]: With dead ends: 72 [2023-04-02 23:07:00,984 INFO L226 Difference]: Without dead ends: 54 [2023-04-02 23:07:00,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-04-02 23:07:00,986 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:07:00,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 6 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:07:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-02 23:07:01,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-02 23:07:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-02 23:07:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2023-04-02 23:07:01,018 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 31 [2023-04-02 23:07:01,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:07:01,018 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2023-04-02 23:07:01,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 23:07:01,019 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2023-04-02 23:07:01,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 23:07:01,021 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:07:01,021 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:07:01,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 23:07:01,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:07:01,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:07:01,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:07:01,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1036351980, now seen corresponding path program 1 times [2023-04-02 23:07:01,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:07:01,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740247400] [2023-04-02 23:07:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:07:01,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:07:01,242 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:07:01,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446294162] [2023-04-02 23:07:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:07:01,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:07:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:07:01,244 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:07:01,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:07:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:07:01,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-02 23:07:01,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:07:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-02 23:07:01,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:07:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-02 23:07:01,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:07:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740247400] [2023-04-02 23:07:01,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:07:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446294162] [2023-04-02 23:07:01,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446294162] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:07:01,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487952388] [2023-04-02 23:07:01,912 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-02 23:07:01,912 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:07:01,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:07:01,912 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:07:01,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:07:01,937 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:07:02,401 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:07:02,404 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-04-02 23:07:02,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:07:02,409 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:07:02,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1040#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:07:02,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:07:02,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:07:02,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2023-04-02 23:07:02,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271379859] [2023-04-02 23:07:02,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:07:02,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 23:07:02,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:07:02,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 23:07:02,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2023-04-02 23:07:02,633 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2023-04-02 23:07:05,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:07:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:07:06,259 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-04-02 23:07:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 23:07:06,261 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) Word has length 48 [2023-04-02 23:07:06,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:07:06,263 INFO L225 Difference]: With dead ends: 78 [2023-04-02 23:07:06,263 INFO L226 Difference]: Without dead ends: 70 [2023-04-02 23:07:06,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-04-02 23:07:06,265 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:07:06,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 122 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 265 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-04-02 23:07:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-02 23:07:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-04-02 23:07:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 22 states have call successors, (22), 10 states have call predecessors, (22), 9 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-02 23:07:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2023-04-02 23:07:06,288 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 48 [2023-04-02 23:07:06,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:07:06,289 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2023-04-02 23:07:06,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2023-04-02 23:07:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2023-04-02 23:07:06,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 23:07:06,290 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:07:06,290 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:07:06,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 23:07:06,496 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,SelfDestructingSolverStorable3 [2023-04-02 23:07:06,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:07:06,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:07:06,496 INFO L85 PathProgramCache]: Analyzing trace with hash -860679289, now seen corresponding path program 1 times [2023-04-02 23:07:06,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:07:06,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636473560] [2023-04-02 23:07:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:07:06,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:07:06,524 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:07:06,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469034446] [2023-04-02 23:07:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:07:06,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:07:06,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:07:06,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:07:06,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 23:07:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:07:06,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 23:07:06,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:07:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-02 23:07:06,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:07:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-02 23:07:08,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:07:08,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636473560] [2023-04-02 23:07:08,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:07:08,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469034446] [2023-04-02 23:07:08,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469034446] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:07:08,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1890889967] [2023-04-02 23:07:08,329 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-02 23:07:08,329 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:07:08,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:07:08,330 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:07:08,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:07:08,344 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:07:08,666 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:07:08,668 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-04-02 23:07:08,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:07:08,673 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:07:09,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1625#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:07:09,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:07:09,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:07:09,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-04-02 23:07:09,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020301743] [2023-04-02 23:07:09,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:07:09,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 23:07:09,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:07:09,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 23:07:09,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2023-04-02 23:07:09,122 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-02 23:07:11,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 23:07:13,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:07:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:07:14,037 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2023-04-02 23:07:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:07:14,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 55 [2023-04-02 23:07:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:07:14,039 INFO L225 Difference]: With dead ends: 82 [2023-04-02 23:07:14,039 INFO L226 Difference]: Without dead ends: 80 [2023-04-02 23:07:14,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-04-02 23:07:14,040 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-04-02 23:07:14,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 140 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 331 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2023-04-02 23:07:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-04-02 23:07:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2023-04-02 23:07:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-02 23:07:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2023-04-02 23:07:14,063 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 55 [2023-04-02 23:07:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:07:14,064 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2023-04-02 23:07:14,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-02 23:07:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2023-04-02 23:07:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 23:07:14,065 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:07:14,065 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:07:14,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 23:07:14,270 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 [2023-04-02 23:07:14,271 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:07:14,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:07:14,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1143149830, now seen corresponding path program 1 times [2023-04-02 23:07:14,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:07:14,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724311488] [2023-04-02 23:07:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:07:14,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:07:14,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:07:14,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462286851] [2023-04-02 23:07:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:07:14,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:07:14,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:07:14,282 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:07:14,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 23:07:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:07:15,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 23:07:15,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:07:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-02 23:07:16,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:08:03,676 WARN L223 SmtUtils]: Spent 9.19s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 23:09:01,870 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~p~0 4294967296)) (.cse0 (mod c_main_~d~0 4294967296)) (.cse2 (mod c_main_~r~0 4294967296))) (or (not (= (mod (* c_main_~p~0 c_main_~B~0) 4294967296) .cse0)) (= .cse1 1) (let ((.cse5 (div .cse0 2))) (let ((.cse3 (mod .cse5 4294967296)) (.cse4 (mod c_main_~A~0 4294967296)) (.cse6 (* c_main_~q~0 c_main_~B~0))) (and (or (< .cse2 .cse3) (= .cse4 (mod (+ (* 4294967295 .cse5) c_main_~r~0 .cse6 (* c_main_~B~0 (div .cse1 2))) 4294967296))) (or (<= .cse3 .cse2) (= .cse4 (mod (+ c_main_~r~0 .cse6) 4294967296)))))) (<= .cse0 .cse2))) is different from true [2023-04-02 23:10:47,864 WARN L223 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 23:11:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 35 proven. 19 refuted. 0 times theorem prover too weak. 82 trivial. 5 not checked. [2023-04-02 23:11:16,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:11:16,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724311488] [2023-04-02 23:11:16,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:11:16,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462286851] [2023-04-02 23:11:16,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462286851] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:11:16,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [359857677] [2023-04-02 23:11:16,221 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-02 23:11:16,221 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:11:16,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:11:16,221 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:11:16,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:11:16,236 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:11:16,667 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:11:16,671 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-04-02 23:11:16,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:11:16,676 INFO L180 IcfgInterpreter]: Interpretation finished