/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/hard-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:32:13,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:32:13,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:32:13,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:32:13,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:32:13,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:32:13,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:32:13,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:32:13,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:32:13,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:32:13,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:32:13,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:32:13,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:32:13,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:32:13,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:32:13,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:32:13,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:32:13,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:32:13,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:32:13,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:32:13,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:32:13,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:32:13,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:32:13,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:32:13,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:32:13,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:32:13,630 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:32:13,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:32:13,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:32:13,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:32:13,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:32:13,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:32:13,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:32:13,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:32:13,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:32:13,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:32:13,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:32:13,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:32:13,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:32:13,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:32:13,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:32:13,640 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 22:32:13,656 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:32:13,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:32:13,656 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:32:13,656 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:32:13,657 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:32:13,657 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:32:13,657 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:32:13,657 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:32:13,657 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:32:13,657 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:32:13,657 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:32:13,658 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:32:13,658 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:32:13,658 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:32:13,658 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:32:13,658 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:32:13,658 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:32:13,658 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:32:13,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:32:13,658 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:32:13,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:32:13,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:32:13,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:32:13,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:32:13,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:32:13,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:32:13,659 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:32:13,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:32:13,659 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:32:13,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:32:13,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:32:13,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:32:13,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:32:13,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:32:13,660 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:32:13,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:32:13,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:32:13,660 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:32:13,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:32:13,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:32:13,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:32:13,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:32:13,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:32:13,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:32:13,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:32:13,800 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:32:13,800 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:32:13,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard-u.c [2023-04-02 22:32:14,862 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:32:14,998 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:32:14,999 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-u.c [2023-04-02 22:32:15,006 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b9047776/1f1fd614d15e4d8d88626a5c88105edd/FLAG92213d2e0 [2023-04-02 22:32:15,021 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b9047776/1f1fd614d15e4d8d88626a5c88105edd [2023-04-02 22:32:15,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:32:15,024 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:32:15,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:32:15,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:32:15,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:32:15,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:32:15" (1/1) ... [2023-04-02 22:32:15,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75ac8f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:32:15, skipping insertion in model container [2023-04-02 22:32:15,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:32:15" (1/1) ... [2023-04-02 22:32:15,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:32:15,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:32:15,174 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/hard-u.c[537,550] [2023-04-02 22:32:15,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:32:15,189 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:32:15,196 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/hard-u.c[537,550] [2023-04-02 22:32:15,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:32:15,209 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:32:15,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:32:15 WrapperNode [2023-04-02 22:32:15,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:32:15,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:32:15,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:32:15,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:32:15,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:32:15" (1/1) ... [2023-04-02 22:32:15,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:32:15" (1/1) ... [2023-04-02 22:32:15,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:32:15" (1/1) ... [2023-04-02 22:32:15,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:32:15" (1/1) ... [2023-04-02 22:32:15,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:32:15" (1/1) ... [2023-04-02 22:32:15,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:32:15" (1/1) ... [2023-04-02 22:32:15,227 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:32:15" (1/1) ... [2023-04-02 22:32:15,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:32:15" (1/1) ... [2023-04-02 22:32:15,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:32:15,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:32:15,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:32:15,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:32:15,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:32:15" (1/1) ... [2023-04-02 22:32:15,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:32:15,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:32:15,263 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 22:32:15,265 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 22:32:15,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:32:15,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:32:15,294 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:32:15,297 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:32:15,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:32:15,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:32:15,297 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:32:15,297 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:32:15,297 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:32:15,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:32:15,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 22:32:15,297 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:32:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:32:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:32:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:32:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:32:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:32:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:32:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:32:15,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:32:15,347 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:32:15,349 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:32:15,522 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:32:15,605 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:32:15,605 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 22:32:15,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:32:15 BoogieIcfgContainer [2023-04-02 22:32:15,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:32:15,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:32:15,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:32:15,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:32:15,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:32:15" (1/3) ... [2023-04-02 22:32:15,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae0a127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:32:15, skipping insertion in model container [2023-04-02 22:32:15,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:32:15" (2/3) ... [2023-04-02 22:32:15,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae0a127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:32:15, skipping insertion in model container [2023-04-02 22:32:15,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:32:15" (3/3) ... [2023-04-02 22:32:15,624 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u.c [2023-04-02 22:32:15,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:32:15,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:32:15,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:32:15,684 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;@2211e331, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:32:15,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:32:15,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2023-04-02 22:32:15,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 22:32:15,694 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:32:15,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:32:15,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:32:15,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:32:15,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1934292817, now seen corresponding path program 1 times [2023-04-02 22:32:15,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:32:15,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547596485] [2023-04-02 22:32:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:32:15,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:32:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:32:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:32:16,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:32:16,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547596485] [2023-04-02 22:32:16,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547596485] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:32:16,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:32:16,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:32:16,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747708364] [2023-04-02 22:32:16,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:32:16,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:32:16,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:32:16,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:32:16,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:32:16,043 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-04-02 22:32:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:32:16,116 INFO L93 Difference]: Finished difference Result 63 states and 100 transitions. [2023-04-02 22:32:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:32:16,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 14 [2023-04-02 22:32:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:32:16,125 INFO L225 Difference]: With dead ends: 63 [2023-04-02 22:32:16,126 INFO L226 Difference]: Without dead ends: 36 [2023-04-02 22:32:16,128 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 22:32:16,130 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:32:16,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 99 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:32:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-02 22:32:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-04-02 22:32:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 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) [2023-04-02 22:32:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-04-02 22:32:16,158 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2023-04-02 22:32:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:32:16,158 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-04-02 22:32:16,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-04-02 22:32:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-04-02 22:32:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 22:32:16,159 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:32:16,159 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:32:16,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 22:32:16,159 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:32:16,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:32:16,160 INFO L85 PathProgramCache]: Analyzing trace with hash 667189618, now seen corresponding path program 1 times [2023-04-02 22:32:16,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:32:16,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803574984] [2023-04-02 22:32:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:32:16,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:32:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:32:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:32:16,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:32:16,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803574984] [2023-04-02 22:32:16,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803574984] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:32:16,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:32:16,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:32:16,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103423843] [2023-04-02 22:32:16,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:32:16,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:32:16,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:32:16,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:32:16,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:32:16,289 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-04-02 22:32:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:32:16,330 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-04-02 22:32:16,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:32:16,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 19 [2023-04-02 22:32:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:32:16,331 INFO L225 Difference]: With dead ends: 42 [2023-04-02 22:32:16,331 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 22:32:16,332 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 22:32:16,333 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 87 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 [2023-04-02 22:32:16,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 87 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:32:16,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 22:32:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-04-02 22:32:16,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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) [2023-04-02 22:32:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-04-02 22:32:16,339 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 19 [2023-04-02 22:32:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:32:16,340 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-04-02 22:32:16,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-04-02 22:32:16,340 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-04-02 22:32:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 22:32:16,340 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:32:16,340 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] [2023-04-02 22:32:16,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 22:32:16,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:32:16,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:32:16,341 INFO L85 PathProgramCache]: Analyzing trace with hash 203307953, now seen corresponding path program 1 times [2023-04-02 22:32:16,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:32:16,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808274151] [2023-04-02 22:32:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:32:16,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:32:16,363 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:32:16,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848004254] [2023-04-02 22:32:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:32:16,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:32:16,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:32:16,366 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 22:32:16,367 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 22:32:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:32:16,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 22:32:16,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:32:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:32:16,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:32:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:32:16,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:32:16,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808274151] [2023-04-02 22:32:16,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:32:16,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848004254] [2023-04-02 22:32:16,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848004254] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:32:16,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1847571440] [2023-04-02 22:32:16,716 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 22:32:16,716 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:32:16,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:32:16,722 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:32:16,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:32:16,787 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:32:16,928 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-02 22:32:16,933 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 22 for LOIs [2023-04-02 22:32:16,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:32:16,945 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:32:17,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1847571440] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:32:17,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:32:17,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 7] total 20 [2023-04-02 22:32:17,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73987783] [2023-04-02 22:32:17,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:32:17,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 22:32:17,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:32:17,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 22:32:17,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-04-02 22:32:17,141 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 10 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 22:32:17,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:32:17,691 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2023-04-02 22:32:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 22:32:17,691 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2023-04-02 22:32:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:32:17,692 INFO L225 Difference]: With dead ends: 69 [2023-04-02 22:32:17,692 INFO L226 Difference]: Without dead ends: 51 [2023-04-02 22:32:17,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2023-04-02 22:32:17,694 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:32:17,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 5 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 22:32:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-02 22:32:17,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-04-02 22:32:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 22:32:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-04-02 22:32:17,706 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 24 [2023-04-02 22:32:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:32:17,713 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-04-02 22:32:17,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 22:32:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-04-02 22:32:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 22:32:17,714 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:32:17,715 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:32:17,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 22:32:17,920 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 22:32:17,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:32:17,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:32:17,920 INFO L85 PathProgramCache]: Analyzing trace with hash 856949456, now seen corresponding path program 1 times [2023-04-02 22:32:17,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:32:17,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497180032] [2023-04-02 22:32:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:32:17,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:32:17,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:32:17,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605068833] [2023-04-02 22:32:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:32:17,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:32:17,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:32:17,930 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 22:32:17,932 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 22:32:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:32:17,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-02 22:32:17,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:32:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 22:32:18,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:32:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 22:32:18,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:32:18,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497180032] [2023-04-02 22:32:18,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:32:18,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605068833] [2023-04-02 22:32:18,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605068833] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:32:18,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694195455] [2023-04-02 22:32:18,203 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 22:32:18,203 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:32:18,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:32:18,204 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:32:18,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:32:18,217 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:32:18,493 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:32:18,495 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 22 for LOIs [2023-04-02 22:32:18,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:32:18,502 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:32:18,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '917#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:32:18,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:32:18,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:32:18,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-04-02 22:32:18,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367590165] [2023-04-02 22:32:18,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:32:18,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 22:32:18,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:32:18,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 22:32:18,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-02 22:32:18,680 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-02 22:32:21,260 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 22:32:22,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:32:22,513 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-04-02 22:32:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 22:32:22,514 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 41 [2023-04-02 22:32:22,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:32:22,515 INFO L225 Difference]: With dead ends: 78 [2023-04-02 22:32:22,516 INFO L226 Difference]: Without dead ends: 70 [2023-04-02 22:32:22,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-04-02 22:32:22,517 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-02 22:32:22,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 134 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-04-02 22:32:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-02 22:32:22,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2023-04-02 22:32:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-02 22:32:22,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2023-04-02 22:32:22,534 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2023-04-02 22:32:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:32:22,534 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2023-04-02 22:32:22,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-02 22:32:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2023-04-02 22:32:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 22:32:22,535 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:32:22,535 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:32:22,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 22:32:22,740 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 22:32:22,740 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:32:22,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:32:22,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1871718208, now seen corresponding path program 1 times [2023-04-02 22:32:22,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:32:22,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380471544] [2023-04-02 22:32:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:32:22,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:32:22,761 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:32:22,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782434286] [2023-04-02 22:32:22,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:32:22,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:32:22,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:32:22,779 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 22:32:22,781 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 22:32:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:32:22,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 22:32:22,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:32:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 22:32:22,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:32:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 22:32:24,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:32:24,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380471544] [2023-04-02 22:32:24,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:32:24,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782434286] [2023-04-02 22:32:24,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782434286] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:32:24,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541966203] [2023-04-02 22:32:24,056 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 22:32:24,057 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:32:24,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:32:24,057 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:32:24,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:32:24,070 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:32:24,307 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:32:24,309 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 22 for LOIs [2023-04-02 22:32:24,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:32:24,316 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:32:24,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1451#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:32:24,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:32:24,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:32:24,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2023-04-02 22:32:24,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674684162] [2023-04-02 22:32:24,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:32:24,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 22:32:24,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:32:24,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 22:32:24,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-04-02 22:32:24,953 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2023-04-02 22:32:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:32:26,874 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2023-04-02 22:32:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 22:32:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 48 [2023-04-02 22:32:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:32:26,875 INFO L225 Difference]: With dead ends: 76 [2023-04-02 22:32:26,875 INFO L226 Difference]: Without dead ends: 74 [2023-04-02 22:32:26,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2023-04-02 22:32:26,876 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-02 22:32:26,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 119 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-02 22:32:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-04-02 22:32:26,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2023-04-02 22:32:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-02 22:32:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2023-04-02 22:32:26,891 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 48 [2023-04-02 22:32:26,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:32:26,891 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2023-04-02 22:32:26,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2023-04-02 22:32:26,892 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2023-04-02 22:32:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 22:32:26,892 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:32:26,893 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:32:26,897 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 22:32:27,097 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 22:32:27,097 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:32:27,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:32:27,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1494414942, now seen corresponding path program 1 times [2023-04-02 22:32:27,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:32:27,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638489064] [2023-04-02 22:32:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:32:27,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:32:27,107 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:32:27,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481067904] [2023-04-02 22:32:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:32:27,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:32:27,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:32:27,130 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 22:32:27,145 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 22:32:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:32:36,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-02 22:32:36,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:32:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 35 proven. 24 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-04-02 22:32:36,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:32:55,112 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~p~0 4294967296)) (.cse0 (mod c_main_~d~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)) (.cse2 (mod c_main_~r~0 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)))))))) is different from true [2023-04-02 22:33:46,734 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 22:35:27,323 WARN L223 SmtUtils]: Spent 6.07s 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 22:35:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 35 proven. 17 refuted. 0 times theorem prover too weak. 76 trivial. 7 not checked. [2023-04-02 22:35:50,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:35:50,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638489064] [2023-04-02 22:35:50,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:35:50,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481067904] [2023-04-02 22:35:50,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481067904] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:35:50,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533540756] [2023-04-02 22:35:50,202 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 22:35:50,202 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:35:50,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:35:50,205 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:35:50,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:35:50,224 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:35:50,540 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:35:50,542 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 22 for LOIs [2023-04-02 22:35:50,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:35:50,546 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:35:58,653 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2068#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:35:58,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:35:58,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:35:58,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-04-02 22:35:58,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935813493] [2023-04-02 22:35:58,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:35:58,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 22:35:58,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:35:58,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 22:35:58,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=563, Unknown=7, NotChecked=98, Total=756 [2023-04-02 22:35:58,655 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 16 states have internal predecessors, (33), 10 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 10 states have call predecessors, (19), 8 states have call successors, (19) [2023-04-02 22:36:05,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:36:07,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:36:09,608 WARN L539 Checker$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 22:36:23,496 WARN L223 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 63 DAG size of output: 20 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:36:26,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:36:35,955 WARN L223 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 65 DAG size of output: 20 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:36:40,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:36:44,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:36:46,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []