/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/hard2_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:09:30,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:09:30,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:09:30,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:09:30,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:09:30,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:09:30,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:09:30,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:09:30,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:09:30,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:09:30,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:09:30,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:09:30,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:09:30,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:09:30,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:09:30,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:09:30,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:09:30,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:09:30,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:09:30,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:09:30,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:09:30,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:09:30,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:09:30,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:09:30,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:09:30,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:09:30,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:09:30,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:09:30,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:09:30,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:09:30,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:09:30,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:09:30,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:09:30,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:09:30,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:09:30,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:09:30,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:09:30,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:09:30,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:09:30,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:09:30,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:09:30,468 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 23:09:30,491 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:09:30,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:09:30,492 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:09:30,492 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:09:30,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:09:30,493 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:09:30,493 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:09:30,493 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:09:30,494 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:09:30,494 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:09:30,494 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:09:30,495 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:09:30,495 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:09:30,495 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:09:30,495 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:09:30,495 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:09:30,495 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:09:30,496 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:09:30,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:09:30,497 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:09:30,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:09:30,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:09:30,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:09:30,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:09:30,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:09:30,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:09:30,498 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:09:30,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:09:30,498 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:09:30,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:09:30,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:09:30,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:09:30,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:09:30,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:09:30,499 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:09:30,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:09:30,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:09:30,500 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:09:30,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:09:30,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:09:30,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:09:30,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:09:30,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:09:30,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:09:30,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:09:30,753 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:09:30,754 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:09:30,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.c [2023-04-02 23:09:31,903 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:09:32,047 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:09:32,047 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound10.c [2023-04-02 23:09:32,052 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780de0395/56384fc5192943c6a087ada2d1e1fb57/FLAG3cc1ce260 [2023-04-02 23:09:32,067 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780de0395/56384fc5192943c6a087ada2d1e1fb57 [2023-04-02 23:09:32,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:09:32,071 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:09:32,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:09:32,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:09:32,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:09:32,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:09:32" (1/1) ... [2023-04-02 23:09:32,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@679b2bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:09:32, skipping insertion in model container [2023-04-02 23:09:32,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:09:32" (1/1) ... [2023-04-02 23:09:32,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:09:32,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:09:32,251 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/hard2_valuebound10.c[526,539] [2023-04-02 23:09:32,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:09:32,288 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:09:32,303 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/hard2_valuebound10.c[526,539] [2023-04-02 23:09:32,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:09:32,327 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:09:32,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:09:32 WrapperNode [2023-04-02 23:09:32,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:09:32,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:09:32,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:09:32,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:09:32,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:09:32" (1/1) ... [2023-04-02 23:09:32,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:09:32" (1/1) ... [2023-04-02 23:09:32,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:09:32" (1/1) ... [2023-04-02 23:09:32,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:09:32" (1/1) ... [2023-04-02 23:09:32,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:09:32" (1/1) ... [2023-04-02 23:09:32,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:09:32" (1/1) ... [2023-04-02 23:09:32,370 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:09:32" (1/1) ... [2023-04-02 23:09:32,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:09:32" (1/1) ... [2023-04-02 23:09:32,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:09:32,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:09:32,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:09:32,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:09:32,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:09:32" (1/1) ... [2023-04-02 23:09:32,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:09:32,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:09:32,406 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 23:09:32,426 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 23:09:32,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:09:32,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:09:32,445 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:09:32,445 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 23:09:32,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 23:09:32,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:09:32,446 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:09:32,446 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:09:32,446 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:09:32,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:09:32,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:09:32,446 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:09:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:09:32,504 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:09:32,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:09:32,636 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:09:32,707 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:09:32,708 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 23:09:32,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:09:32 BoogieIcfgContainer [2023-04-02 23:09:32,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:09:32,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:09:32,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:09:32,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:09:32,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:09:32" (1/3) ... [2023-04-02 23:09:32,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191b20aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:09:32, skipping insertion in model container [2023-04-02 23:09:32,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:09:32" (2/3) ... [2023-04-02 23:09:32,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191b20aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:09:32, skipping insertion in model container [2023-04-02 23:09:32,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:09:32" (3/3) ... [2023-04-02 23:09:32,716 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound10.c [2023-04-02 23:09:32,754 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:09:32,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:09:32,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:09:32,807 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;@385b1b6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:09:32,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:09:32,812 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 23:09:32,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 23:09:32,818 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:09:32,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:09:32,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:09:32,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:09:32,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1934292817, now seen corresponding path program 1 times [2023-04-02 23:09:32,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:09:32,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644390763] [2023-04-02 23:09:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:32,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:09:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:09:33,071 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 23:09:33,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:09:33,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644390763] [2023-04-02 23:09:33,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644390763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:09:33,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:09:33,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:09:33,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175058300] [2023-04-02 23:09:33,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:09:33,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:09:33,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:09:33,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:09:33,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:09:33,121 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 23:09:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:09:33,275 INFO L93 Difference]: Finished difference Result 63 states and 100 transitions. [2023-04-02 23:09:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:09:33,281 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 23:09:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:09:33,287 INFO L225 Difference]: With dead ends: 63 [2023-04-02 23:09:33,288 INFO L226 Difference]: Without dead ends: 36 [2023-04-02 23:09:33,290 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 23:09:33,293 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:09:33,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 99 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:09:33,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-02 23:09:33,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-04-02 23:09:33,333 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 23:09:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-04-02 23:09:33,338 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2023-04-02 23:09:33,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:09:33,339 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-04-02 23:09:33,340 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 23:09:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-04-02 23:09:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 23:09:33,341 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:09:33,341 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 23:09:33,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:09:33,342 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:09:33,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:09:33,343 INFO L85 PathProgramCache]: Analyzing trace with hash 667189618, now seen corresponding path program 1 times [2023-04-02 23:09:33,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:09:33,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750612911] [2023-04-02 23:09:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:33,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:09:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:09:33,508 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 23:09:33,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:09:33,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750612911] [2023-04-02 23:09:33,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750612911] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:09:33,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:09:33,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:09:33,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038774828] [2023-04-02 23:09:33,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:09:33,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:09:33,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:09:33,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:09:33,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:09:33,512 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 23:09:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:09:33,583 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-04-02 23:09:33,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:09:33,583 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 23:09:33,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:09:33,585 INFO L225 Difference]: With dead ends: 42 [2023-04-02 23:09:33,585 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 23:09:33,585 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 23:09:33,586 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:09:33,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 86 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:09:33,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 23:09:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-04-02 23:09:33,593 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 23:09:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-04-02 23:09:33,594 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 19 [2023-04-02 23:09:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:09:33,594 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-04-02 23:09:33,594 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 23:09:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-04-02 23:09:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 23:09:33,595 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:09:33,595 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 23:09:33,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:09:33,596 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:09:33,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:09:33,596 INFO L85 PathProgramCache]: Analyzing trace with hash 203307953, now seen corresponding path program 1 times [2023-04-02 23:09:33,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:09:33,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420562821] [2023-04-02 23:09:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:33,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:09:33,609 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:09:33,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798264655] [2023-04-02 23:09:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:33,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:09:33,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:09:33,613 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 23:09:33,623 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 23:09:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:09:33,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:09:33,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:09:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 23:09:33,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:09:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 23:09:34,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:09:34,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420562821] [2023-04-02 23:09:34,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:09:34,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798264655] [2023-04-02 23:09:34,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798264655] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:09:34,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1503403792] [2023-04-02 23:09:34,063 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:09:34,064 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:09:34,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:09:34,070 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:09:34,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:09:34,174 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:09:34,408 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-02 23:09:34,415 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:09:34,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:09:34,441 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:09:34,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1503403792] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:09:34,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:09:34,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 7] total 22 [2023-04-02 23:09:34,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287675983] [2023-04-02 23:09:34,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:09:34,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 23:09:34,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:09:34,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 23:09:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-04-02 23:09:34,742 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 23:09:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:09:35,967 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2023-04-02 23:09:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:09:35,968 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2023-04-02 23:09:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:09:35,969 INFO L225 Difference]: With dead ends: 69 [2023-04-02 23:09:35,969 INFO L226 Difference]: Without dead ends: 51 [2023-04-02 23:09:35,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2023-04-02 23:09:35,971 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:09:35,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 5 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:09:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-02 23:09:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-04-02 23:09:36,001 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 23:09:36,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-04-02 23:09:36,020 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 24 [2023-04-02 23:09:36,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:09:36,022 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-04-02 23:09:36,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 23:09:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-04-02 23:09:36,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 23:09:36,024 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:09:36,024 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 23:09:36,033 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 23:09:36,232 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 23:09:36,233 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:09:36,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:09:36,233 INFO L85 PathProgramCache]: Analyzing trace with hash 856949456, now seen corresponding path program 1 times [2023-04-02 23:09:36,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:09:36,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462984467] [2023-04-02 23:09:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:36,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:09:36,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:09:36,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678546479] [2023-04-02 23:09:36,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:36,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:09:36,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:09:36,270 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 23:09:36,272 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 23:09:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:09:36,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 23:09:36,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:09:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 23:09:36,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:09:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 23:09:36,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:09:36,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462984467] [2023-04-02 23:09:36,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:09:36,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678546479] [2023-04-02 23:09:36,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678546479] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:09:36,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [490023392] [2023-04-02 23:09:36,546 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:09:36,546 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:09:36,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:09:36,546 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:09:36,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:09:36,582 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:09:37,268 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:09:37,271 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:09:37,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:09:37,285 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:09:37,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '922#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:09:37,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:09:37,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:09:37,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-04-02 23:09:37,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424885659] [2023-04-02 23:09:37,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:09:37,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 23:09:37,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:09:37,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 23:09:37,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-04-02 23:09:37,721 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-02 23:09:37,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:09:37,926 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2023-04-02 23:09:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:09:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 41 [2023-04-02 23:09:37,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:09:37,928 INFO L225 Difference]: With dead ends: 85 [2023-04-02 23:09:37,929 INFO L226 Difference]: Without dead ends: 72 [2023-04-02 23:09:37,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2023-04-02 23:09:37,930 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:09:37,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 119 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:09:37,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-02 23:09:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-04-02 23:09:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 42 states have internal predecessors, (43), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-02 23:09:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2023-04-02 23:09:37,957 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 41 [2023-04-02 23:09:37,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:09:37,957 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2023-04-02 23:09:37,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-02 23:09:37,957 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2023-04-02 23:09:37,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 23:09:37,958 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:09:37,958 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 23:09:37,967 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 23:09:38,164 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 23:09:38,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:09:38,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:09:38,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1871718208, now seen corresponding path program 1 times [2023-04-02 23:09:38,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:09:38,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375643015] [2023-04-02 23:09:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:38,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:09:38,189 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:09:38,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357097468] [2023-04-02 23:09:38,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:38,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:09:38,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:09:38,191 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 23:09:38,194 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 23:09:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:09:38,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 23:09:38,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:09:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 23:09:38,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:09:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-02 23:09:38,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:09:38,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375643015] [2023-04-02 23:09:38,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:09:38,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357097468] [2023-04-02 23:09:38,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357097468] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:09:38,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1526236271] [2023-04-02 23:09:38,436 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 23:09:38,436 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:09:38,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:09:38,436 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:09:38,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:09:38,461 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:09:38,966 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:09:38,969 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:09:38,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:09:38,980 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:09:39,435 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1476#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:09:39,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:09:39,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:09:39,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-04-02 23:09:39,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177847898] [2023-04-02 23:09:39,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:09:39,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 23:09:39,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:09:39,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 23:09:39,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-04-02 23:09:39,438 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-02 23:09:39,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:09:39,554 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2023-04-02 23:09:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:09:39,555 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 48 [2023-04-02 23:09:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:09:39,556 INFO L225 Difference]: With dead ends: 81 [2023-04-02 23:09:39,556 INFO L226 Difference]: Without dead ends: 79 [2023-04-02 23:09:39,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-04-02 23:09:39,558 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:09:39,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 73 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:09:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-02 23:09:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2023-04-02 23:09:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 24 states have call successors, (24), 11 states have call predecessors, (24), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-02 23:09:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2023-04-02 23:09:39,582 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 48 [2023-04-02 23:09:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:09:39,582 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2023-04-02 23:09:39,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-02 23:09:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2023-04-02 23:09:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 23:09:39,584 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:09:39,584 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 23:09:39,595 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 23:09:39,789 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 23:09:39,789 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:09:39,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:09:39,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1494414942, now seen corresponding path program 1 times [2023-04-02 23:09:39,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:09:39,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460130899] [2023-04-02 23:09:39,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:39,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:09:39,802 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:09:39,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038165879] [2023-04-02 23:09:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:39,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:09:39,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:09:39,804 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 23:09:39,838 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 23:09:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:09:39,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-02 23:09:39,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:09:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-02 23:09:40,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:09:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-02 23:09:41,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:09:41,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460130899] [2023-04-02 23:09:41,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:09:41,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038165879] [2023-04-02 23:09:41,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038165879] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:09:41,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [744551241] [2023-04-02 23:09:41,594 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 23:09:41,594 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:09:41,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:09:41,594 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:09:41,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:09:41,617 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:09:42,361 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:09:42,368 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:09:42,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:09:42,381 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:09:42,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2107#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:09:42,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:09:42,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:09:42,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-04-02 23:09:42,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107048165] [2023-04-02 23:09:42,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:09:42,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 23:09:42,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:09:42,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 23:09:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2023-04-02 23:09:42,891 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-04-02 23:09:45,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:09:45,401 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2023-04-02 23:09:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:09:45,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 60 [2023-04-02 23:09:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:09:45,403 INFO L225 Difference]: With dead ends: 104 [2023-04-02 23:09:45,403 INFO L226 Difference]: Without dead ends: 102 [2023-04-02 23:09:45,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2023-04-02 23:09:45,404 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:09:45,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 128 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 23:09:45,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-02 23:09:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2023-04-02 23:09:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 63 states have internal predecessors, (64), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-02 23:09:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2023-04-02 23:09:45,440 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 60 [2023-04-02 23:09:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:09:45,440 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2023-04-02 23:09:45,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-04-02 23:09:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2023-04-02 23:09:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-02 23:09:45,442 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:09:45,442 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:09:45,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 23:09:45,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:09:45,647 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:09:45,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:09:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash 920785569, now seen corresponding path program 1 times [2023-04-02 23:09:45,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:09:45,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946443039] [2023-04-02 23:09:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:45,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:09:45,660 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:09:45,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450715097] [2023-04-02 23:09:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:45,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:09:45,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:09:45,662 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:09:45,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 23:09:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:09:45,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-02 23:09:45,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:09:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-04-02 23:09:45,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:09:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-04-02 23:09:46,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:09:46,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946443039] [2023-04-02 23:09:46,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:09:46,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450715097] [2023-04-02 23:09:46,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450715097] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:09:46,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1457198057] [2023-04-02 23:09:46,575 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-02 23:09:46,575 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:09:46,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:09:46,575 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:09:46,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:09:46,599 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:09:47,358 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:09:47,360 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:09:47,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:09:47,370 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:09:47,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2873#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:09:47,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:09:47,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:09:47,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-04-02 23:09:47,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846288399] [2023-04-02 23:09:47,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:09:47,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 23:09:47,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:09:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 23:09:47,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-04-02 23:09:47,849 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-04-02 23:09:48,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:09:48,408 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2023-04-02 23:09:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 23:09:48,408 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 71 [2023-04-02 23:09:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:09:48,410 INFO L225 Difference]: With dead ends: 122 [2023-04-02 23:09:48,410 INFO L226 Difference]: Without dead ends: 107 [2023-04-02 23:09:48,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 179 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 23:09:48,411 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:09:48,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 100 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:09:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-02 23:09:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2023-04-02 23:09:48,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 21 states have call successors, (21), 16 states have call predecessors, (21), 15 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-02 23:09:48,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2023-04-02 23:09:48,453 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 71 [2023-04-02 23:09:48,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:09:48,453 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2023-04-02 23:09:48,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-04-02 23:09:48,454 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2023-04-02 23:09:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-02 23:09:48,460 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:09:48,461 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 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 23:09:48,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:09:48,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:09:48,667 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:09:48,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:09:48,667 INFO L85 PathProgramCache]: Analyzing trace with hash -248496609, now seen corresponding path program 1 times [2023-04-02 23:09:48,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:09:48,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975646503] [2023-04-02 23:09:48,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:48,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:09:48,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:09:48,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615858576] [2023-04-02 23:09:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:48,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:09:48,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:09:48,692 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:09:48,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 23:09:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:09:48,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 23:09:48,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:09:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-04-02 23:09:48,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:09:48,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:09:48,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975646503] [2023-04-02 23:09:48,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:09:48,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615858576] [2023-04-02 23:09:48,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615858576] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:09:48,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:09:48,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:09:48,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75234001] [2023-04-02 23:09:48,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:09:48,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:09:48,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:09:48,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:09:48,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:09:48,795 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-02 23:09:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:09:48,868 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2023-04-02 23:09:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:09:48,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2023-04-02 23:09:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:09:48,873 INFO L225 Difference]: With dead ends: 100 [2023-04-02 23:09:48,873 INFO L226 Difference]: Without dead ends: 88 [2023-04-02 23:09:48,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:09:48,875 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:09:48,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:09:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-02 23:09:48,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-04-02 23:09:48,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-02 23:09:48,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2023-04-02 23:09:48,913 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 81 [2023-04-02 23:09:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:09:48,915 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2023-04-02 23:09:48,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-02 23:09:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2023-04-02 23:09:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 23:09:48,917 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:09:48,917 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:09:48,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 23:09:49,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:09:49,125 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:09:49,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:09:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash 761596098, now seen corresponding path program 2 times [2023-04-02 23:09:49,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:09:49,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573012771] [2023-04-02 23:09:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:49,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:09:49,133 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:09:49,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945245657] [2023-04-02 23:09:49,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:09:49,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:09:49,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:09:49,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:09:49,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 23:09:49,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 23:09:49,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:09:49,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-02 23:09:49,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:09:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-04-02 23:09:49,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:09:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-04-02 23:09:50,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:09:50,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573012771] [2023-04-02 23:09:50,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:09:50,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945245657] [2023-04-02 23:09:50,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945245657] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:09:50,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1363862442] [2023-04-02 23:09:50,254 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 23:09:50,254 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:09:50,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:09:50,254 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:09:50,255 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:09:50,274 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:09:50,958 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:09:50,960 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:09:50,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:09:50,969 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:09:51,474 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4239#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:09:51,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:09:51,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:09:51,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2023-04-02 23:09:51,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439509123] [2023-04-02 23:09:51,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:09:51,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 23:09:51,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:09:51,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 23:09:51,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-04-02 23:09:51,477 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2023-04-02 23:09:57,897 WARN L223 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 23:09:58,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:09:58,544 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2023-04-02 23:09:58,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:09:58,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) Word has length 82 [2023-04-02 23:09:58,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:09:58,546 INFO L225 Difference]: With dead ends: 120 [2023-04-02 23:09:58,546 INFO L226 Difference]: Without dead ends: 118 [2023-04-02 23:09:58,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 211 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2023-04-02 23:09:58,547 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 26 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:09:58,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 138 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 23:09:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-04-02 23:09:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2023-04-02 23:09:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 70 states have internal predecessors, (73), 31 states have call successors, (31), 17 states have call predecessors, (31), 16 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-04-02 23:09:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2023-04-02 23:09:58,587 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 82 [2023-04-02 23:09:58,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:09:58,588 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2023-04-02 23:09:58,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2023-04-02 23:09:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2023-04-02 23:09:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-02 23:09:58,589 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:09:58,589 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:09:58,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 23:09:58,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:09:58,795 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:09:58,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:09:58,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2082694307, now seen corresponding path program 3 times [2023-04-02 23:09:58,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:09:58,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584066831] [2023-04-02 23:09:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:09:58,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:09:58,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:09:58,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109213484] [2023-04-02 23:09:58,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 23:09:58,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:09:58,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:09:58,815 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:09:58,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 23:09:58,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 23:09:58,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:09:58,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-02 23:09:58,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:09:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 61 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-04-02 23:09:59,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:10:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 61 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-04-02 23:10:46,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:10:46,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584066831] [2023-04-02 23:10:46,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:10:46,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109213484] [2023-04-02 23:10:46,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109213484] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:10:46,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [770399974] [2023-04-02 23:10:46,044 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 23:10:46,044 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:10:46,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:10:46,044 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:10:46,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:10:46,069 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:10:46,772 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:10:46,774 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:10:46,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:10:46,783 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:10:47,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5164#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:10:47,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:10:47,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:10:47,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2023-04-02 23:10:47,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237714295] [2023-04-02 23:10:47,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:10:47,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 23:10:47,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:10:47,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 23:10:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 23:10:47,758 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 17 states have internal predecessors, (40), 13 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) [2023-04-02 23:11:34,144 WARN L223 SmtUtils]: Spent 45.46s on a formula simplification. DAG size of input: 195 DAG size of output: 167 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 23:12:23,897 WARN L223 SmtUtils]: Spent 47.07s on a formula simplification. DAG size of input: 176 DAG size of output: 161 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 23:12:30,139 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 23:12:31,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:12:34,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:12:35,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:12:35,406 INFO L93 Difference]: Finished difference Result 156 states and 179 transitions. [2023-04-02 23:12:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 23:12:35,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 17 states have internal predecessors, (40), 13 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) Word has length 89 [2023-04-02 23:12:35,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:12:35,407 INFO L225 Difference]: With dead ends: 156 [2023-04-02 23:12:35,407 INFO L226 Difference]: Without dead ends: 154 [2023-04-02 23:12:35,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 229 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 103.9s TimeCoverageRelationStatistics Valid=227, Invalid=1254, Unknown=1, NotChecked=0, Total=1482 [2023-04-02 23:12:35,409 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 40 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:12:35,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 180 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 550 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2023-04-02 23:12:35,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-04-02 23:12:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2023-04-02 23:12:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 90 states have (on average 1.0777777777777777) internal successors, (97), 93 states have internal predecessors, (97), 38 states have call successors, (38), 22 states have call predecessors, (38), 21 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2023-04-02 23:12:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 171 transitions. [2023-04-02 23:12:35,486 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 171 transitions. Word has length 89 [2023-04-02 23:12:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:12:35,487 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 171 transitions. [2023-04-02 23:12:35,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 17 states have internal predecessors, (40), 13 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) [2023-04-02 23:12:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 171 transitions. [2023-04-02 23:12:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 23:12:35,488 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:12:35,488 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:12:35,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 23:12:35,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 23:12:35,689 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:12:35,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:12:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1365671168, now seen corresponding path program 2 times [2023-04-02 23:12:35,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:12:35,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981842016] [2023-04-02 23:12:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:12:35,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:12:35,696 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:12:35,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794256298] [2023-04-02 23:12:35,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:12:35,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:12:35,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:12:35,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:12:35,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 23:12:35,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 23:12:35,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:12:35,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-02 23:12:35,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:12:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 113 proven. 39 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-04-02 23:12:35,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:12:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2023-04-02 23:12:36,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:12:36,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981842016] [2023-04-02 23:12:36,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:12:36,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794256298] [2023-04-02 23:12:36,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794256298] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:12:36,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1054274569] [2023-04-02 23:12:36,008 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-02 23:12:36,008 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:12:36,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:12:36,009 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:12:36,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:12:36,024 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:12:36,683 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:12:36,685 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:12:36,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:12:36,694 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:12:37,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6264#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:12:37,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:12:37,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:12:37,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-04-02 23:12:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771582431] [2023-04-02 23:12:37,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:12:37,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 23:12:37,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:12:37,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 23:12:37,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2023-04-02 23:12:37,221 INFO L87 Difference]: Start difference. First operand 150 states and 171 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-02 23:12:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:12:37,466 INFO L93 Difference]: Finished difference Result 150 states and 171 transitions. [2023-04-02 23:12:37,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:12:37,467 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) Word has length 100 [2023-04-02 23:12:37,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:12:37,467 INFO L225 Difference]: With dead ends: 150 [2023-04-02 23:12:37,467 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 23:12:37,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 265 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 23:12:37,469 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:12:37,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 73 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:12:37,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 23:12:37,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 23:12:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-02 23:12:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 23:12:37,470 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2023-04-02 23:12:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:12:37,470 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 23:12:37,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-02 23:12:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 23:12:37,471 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 23:12:37,473 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 23:12:37,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 23:12:37,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:12:37,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 23:12:43,986 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2023-04-02 23:12:43,987 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 8) no Hoare annotation was computed. [2023-04-02 23:12:43,987 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 13) the Hoare annotation is: true [2023-04-02 23:12:43,987 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2023-04-02 23:12:43,987 INFO L895 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (let ((.cse1 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (or (not (= (select .cse0 0) 104)) (not (= 97 (select .cse0 1))) (not (= (select .cse1 0) 48)) (not (= 8 (select |#length| 2))) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select .cse0 5) 46)) (not (= 100 (select .cse0 3))) (and (<= 0 main_~A~0) (= main_~d~0 1) (= main_~B~0 1) (<= main_~A~0 10) (= main_~p~0 1)) (not (= 114 (select .cse0 2))) (not (= (select |#valid| 3) 1)) (not (= (select .cse0 6) 99)) (not (= (select |#length| 3) 12)) (not (= (select .cse0 7) 0)) (not (= (select |#valid| 0) 0)) (not (= (select .cse1 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= (select |#valid| 2) 1)) (not (= (select .cse0 4) 50)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:12:43,987 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 22 61) no Hoare annotation was computed. [2023-04-02 23:12:43,987 INFO L895 garLoopResultBuilder]: At program point L52-2(lines 44 56) the Hoare annotation is: (let ((.cse1 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (or (not (= (select .cse0 0) 104)) (not (= 97 (select .cse0 1))) (not (= (select .cse1 0) 48)) (not (= 8 (select |#length| 2))) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select .cse0 5) 46)) (not (= 100 (select .cse0 3))) (not (= 114 (select .cse0 2))) (not (= (select |#valid| 3) 1)) (not (= (select .cse0 6) 99)) (not (= (select |#length| 3) 12)) (not (= (select .cse0 7) 0)) (not (= (select |#valid| 0) 0)) (not (= (select .cse1 1) 0)) (not (= (select |#valid| 1) 1)) (and (= main_~A~0 (+ main_~q~0 main_~r~0)) (= main_~d~0 main_~p~0) (<= 0 main_~A~0) (<= 1 main_~p~0) (= main_~B~0 1) (<= main_~A~0 10)) (not (= |#NULL.base| 0)) (not (= (select |#valid| 2) 1)) (not (= (select .cse0 4) 50)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:12:43,987 INFO L899 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2023-04-02 23:12:43,987 INFO L895 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (let ((.cse1 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (or (not (= (select .cse0 0) 104)) (not (= 97 (select .cse0 1))) (not (= (select .cse1 0) 48)) (not (= 8 (select |#length| 2))) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select .cse0 5) 46)) (not (= 100 (select .cse0 3))) (not (= 114 (select .cse0 2))) (not (= (select |#valid| 3) 1)) (not (= (select .cse0 6) 99)) (not (= (select |#length| 3) 12)) (not (= (select .cse0 7) 0)) (not (= (select |#valid| 0) 0)) (not (= (select .cse1 1) 0)) (and (= main_~A~0 (+ main_~q~0 main_~r~0)) (<= 0 main_~A~0) (= main_~d~0 1) (= main_~B~0 1) (<= main_~A~0 10) (= main_~p~0 1)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= (select |#valid| 2) 1)) (not (= (select .cse0 4) 50)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:12:43,987 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 22 61) the Hoare annotation is: true [2023-04-02 23:12:43,988 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse1 (<= 0 main_~A~0)) (.cse6 (select |#memory_int| 1)) (.cse2 (= main_~A~0 main_~r~0)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1)) (.cse5 (<= main_~A~0 10)) (.cse0 (select |#memory_int| 2))) (or (not (= (select .cse0 0) 104)) (not (= 97 (select .cse0 1))) (and (= main_~d~0 main_~p~0) .cse1 .cse2 .cse3 .cse4 .cse5 (<= 4 main_~p~0)) (not (= (select .cse6 0) 48)) (not (= 8 (select |#length| 2))) (not (= |#NULL.offset| 0)) (and .cse1 .cse2 (= main_~d~0 1) .cse3 .cse4 .cse5 (= main_~p~0 1)) (not (= 2 (select |#length| 1))) (not (= (select .cse0 5) 46)) (not (= 100 (select .cse0 3))) (not (= 114 (select .cse0 2))) (not (= (select |#valid| 3) 1)) (not (= (select .cse0 6) 99)) (not (= (select |#length| 3) 12)) (not (= (select .cse0 7) 0)) (not (= (select |#valid| 0) 0)) (not (= (select .cse6 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (and .cse2 (= main_~p~0 2) (<= 1 main_~r~0) (= main_~d~0 2) .cse3 .cse4 .cse5) (not (= (select |#valid| 2) 1)) (not (= (select .cse0 4) 50)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:12:43,988 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse1 (<= 0 main_~A~0)) (.cse6 (select |#memory_int| 1)) (.cse2 (= main_~A~0 main_~r~0)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1)) (.cse5 (<= main_~A~0 10)) (.cse0 (select |#memory_int| 2))) (or (not (= (select .cse0 0) 104)) (not (= 97 (select .cse0 1))) (and (= main_~d~0 main_~p~0) .cse1 .cse2 .cse3 .cse4 .cse5 (<= 4 main_~p~0)) (not (= (select .cse6 0) 48)) (not (= 8 (select |#length| 2))) (not (= |#NULL.offset| 0)) (and .cse1 .cse2 (= main_~d~0 1) .cse3 .cse4 .cse5 (= main_~p~0 1)) (not (= 2 (select |#length| 1))) (not (= (select .cse0 5) 46)) (not (= 100 (select .cse0 3))) (not (= 114 (select .cse0 2))) (not (= (select |#valid| 3) 1)) (not (= (select .cse0 6) 99)) (not (= (select |#length| 3) 12)) (not (= (select .cse0 7) 0)) (not (= (select |#valid| 0) 0)) (not (= (select .cse6 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (and .cse2 (= main_~p~0 2) (<= 1 main_~r~0) (= main_~d~0 2) .cse3 .cse4 .cse5) (not (= (select |#valid| 2) 1)) (not (= (select .cse0 4) 50)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:12:43,988 INFO L899 garLoopResultBuilder]: For program point L59(line 59) no Hoare annotation was computed. [2023-04-02 23:12:43,988 INFO L895 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (let ((.cse1 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (or (not (= (select .cse0 0) 104)) (not (= 97 (select .cse0 1))) (not (= (select .cse1 0) 48)) (not (= 8 (select |#length| 2))) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select .cse0 5) 46)) (not (= 100 (select .cse0 3))) (not (= 114 (select .cse0 2))) (not (= (select |#valid| 3) 1)) (not (= (select .cse0 6) 99)) (and (<= main_~A~0 2147483647) (<= 0 (+ main_~A~0 2147483648))) (not (= (select |#length| 3) 12)) (not (= (select .cse0 7) 0)) (not (= (select |#valid| 0) 0)) (not (= (select .cse1 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= (select |#valid| 2) 1)) (not (= (select .cse0 4) 50)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:12:43,988 INFO L899 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2023-04-02 23:12:43,988 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse1 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (or (not (= (select .cse0 0) 104)) (not (= 97 (select .cse0 1))) (not (= (select .cse1 0) 48)) (not (= 8 (select |#length| 2))) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select .cse0 5) 46)) (not (= 100 (select .cse0 3))) (not (= 114 (select .cse0 2))) (not (= (select |#valid| 3) 1)) (not (= (select .cse0 6) 99)) (not (= (select |#length| 3) 12)) (not (= (select .cse0 7) 0)) (not (= (select |#valid| 0) 0)) (not (= (select .cse1 1) 0)) (not (= (select |#valid| 1) 1)) (and (= main_~A~0 (+ main_~q~0 main_~r~0)) (= main_~d~0 main_~p~0) (<= 0 main_~A~0) (<= 1 main_~p~0) (= main_~B~0 1) (<= main_~A~0 10)) (not (= |#NULL.base| 0)) (not (= (select |#valid| 2) 1)) (not (= (select .cse0 4) 50)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:12:43,988 INFO L895 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse1 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (or (not (= (select .cse0 0) 104)) (not (= 97 (select .cse0 1))) (not (= (select .cse1 0) 48)) (not (= 8 (select |#length| 2))) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select .cse0 5) 46)) (not (= 100 (select .cse0 3))) (not (= 114 (select .cse0 2))) (not (= (select |#valid| 3) 1)) (not (= (select .cse0 6) 99)) (not (= (select |#length| 3) 12)) (not (= (select .cse0 7) 0)) (not (= (select |#valid| 0) 0)) (not (= (select .cse1 1) 0)) (not (= (select |#valid| 1) 1)) (and (= main_~A~0 (+ main_~q~0 main_~r~0)) (= main_~d~0 main_~p~0) (<= 0 main_~A~0) (<= 1 main_~p~0) (= main_~B~0 1) (<= main_~A~0 10)) (not (= |#NULL.base| 0)) (not (= (select |#valid| 2) 1)) (not (= (select .cse0 4) 50)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:12:43,988 INFO L899 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2023-04-02 23:12:43,989 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (<= 0 main_~A~0)) (.cse6 (select |#memory_int| 1)) (.cse2 (= main_~A~0 main_~r~0)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1)) (.cse5 (<= main_~A~0 10)) (.cse0 (select |#memory_int| 2))) (or (not (= (select .cse0 0) 104)) (not (= 97 (select .cse0 1))) (and (= main_~d~0 main_~p~0) .cse1 .cse2 .cse3 .cse4 .cse5 (<= 4 main_~p~0)) (not (= (select .cse6 0) 48)) (not (= 8 (select |#length| 2))) (not (= |#NULL.offset| 0)) (and .cse1 .cse2 (= main_~d~0 1) .cse3 .cse4 .cse5 (= main_~p~0 1)) (not (= 2 (select |#length| 1))) (not (= (select .cse0 5) 46)) (not (= 100 (select .cse0 3))) (not (= 114 (select .cse0 2))) (not (= (select |#valid| 3) 1)) (not (= (select .cse0 6) 99)) (not (= (select |#length| 3) 12)) (not (= (select .cse0 7) 0)) (not (= (select |#valid| 0) 0)) (not (= (select .cse6 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (and .cse2 (= main_~p~0 2) (<= 1 main_~r~0) (= main_~d~0 2) .cse3 .cse4 .cse5) (not (= (select |#valid| 2) 1)) (not (= (select .cse0 4) 50)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:12:43,989 INFO L895 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse1 (<= 0 main_~A~0)) (.cse6 (select |#memory_int| 1)) (.cse2 (= main_~A~0 main_~r~0)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1)) (.cse5 (<= main_~A~0 10)) (.cse0 (select |#memory_int| 2))) (or (not (= (select .cse0 0) 104)) (not (= 97 (select .cse0 1))) (and (= main_~d~0 main_~p~0) .cse1 .cse2 .cse3 .cse4 .cse5 (<= 4 main_~p~0)) (not (= (select .cse6 0) 48)) (not (= 8 (select |#length| 2))) (not (= |#NULL.offset| 0)) (and .cse1 .cse2 (= main_~d~0 1) .cse3 .cse4 .cse5 (= main_~p~0 1)) (not (= 2 (select |#length| 1))) (not (= (select .cse0 5) 46)) (not (= 100 (select .cse0 3))) (not (= 114 (select .cse0 2))) (not (= (select |#valid| 3) 1)) (not (= (select .cse0 6) 99)) (not (= (select |#length| 3) 12)) (not (= (select .cse0 7) 0)) (not (= (select |#valid| 0) 0)) (not (= (select .cse6 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (and .cse2 (= main_~p~0 2) (<= 1 main_~r~0) (= main_~d~0 2) .cse3 .cse4 .cse5) (not (= (select |#valid| 2) 1)) (not (= (select .cse0 4) 50)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:12:43,989 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2023-04-02 23:12:43,989 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 23:12:43,989 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 23:12:43,989 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (let ((.cse1 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (and (= (select .cse0 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse0 2)) (= (select .cse0 6) 99) (= 97 (select .cse0 1)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select .cse0 4) 50) (= 100 (select .cse0 3)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select .cse0 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse1 0) 48) (= (select .cse1 1) 0) (= (select .cse0 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2023-04-02 23:12:43,989 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 23:12:43,989 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 23:12:43,989 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2023-04-02 23:12:43,989 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2023-04-02 23:12:43,989 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2023-04-02 23:12:43,989 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2023-04-02 23:12:43,989 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 20) the Hoare annotation is: true [2023-04-02 23:12:43,989 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-04-02 23:12:43,992 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2023-04-02 23:12:43,993 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 23:12:44,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 11:12:44 BoogieIcfgContainer [2023-04-02 23:12:44,016 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 23:12:44,017 INFO L158 Benchmark]: Toolchain (without parser) took 191946.01ms. Allocated memory was 319.8MB in the beginning and 602.9MB in the end (delta: 283.1MB). Free memory was 271.2MB in the beginning and 380.0MB in the end (delta: -108.9MB). Peak memory consumption was 351.1MB. Max. memory is 8.0GB. [2023-04-02 23:12:44,017 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 220.2MB. Free memory is still 168.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 23:12:44,017 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.35ms. Allocated memory is still 319.8MB. Free memory was 270.8MB in the beginning and 259.9MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-02 23:12:44,017 INFO L158 Benchmark]: Boogie Preprocessor took 45.72ms. Allocated memory is still 319.8MB. Free memory was 259.9MB in the beginning and 258.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 23:12:44,018 INFO L158 Benchmark]: RCFGBuilder took 334.56ms. Allocated memory is still 319.8MB. Free memory was 258.3MB in the beginning and 244.6MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-04-02 23:12:44,018 INFO L158 Benchmark]: TraceAbstraction took 191304.62ms. Allocated memory was 319.8MB in the beginning and 602.9MB in the end (delta: 283.1MB). Free memory was 243.9MB in the beginning and 380.0MB in the end (delta: -136.1MB). Peak memory consumption was 323.9MB. Max. memory is 8.0GB. [2023-04-02 23:12:44,019 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 220.2MB. Free memory is still 168.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 256.35ms. Allocated memory is still 319.8MB. Free memory was 270.8MB in the beginning and 259.9MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.72ms. Allocated memory is still 319.8MB. Free memory was 259.9MB in the beginning and 258.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 334.56ms. Allocated memory is still 319.8MB. Free memory was 258.3MB in the beginning and 244.6MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 191304.62ms. Allocated memory was 319.8MB in the beginning and 602.9MB in the end (delta: 283.1MB). Free memory was 243.9MB in the beginning and 380.0MB in the end (delta: -136.1MB). Peak memory consumption was 323.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 191.2s, OverallIterations: 11, TraceHistogramMax: 16, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 120.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 346 SdHoareTripleChecker+Valid, 10.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 299 mSDsluCounter, 1085 SdHoareTripleChecker+Invalid, 10.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 806 mSDsCounter, 414 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2194 IncrementalHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 414 mSolverCounterUnsat, 279 mSDtfsCounter, 2194 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1667 GetRequests, 1379 SyntacticMatches, 41 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 117.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=150occurred in iteration=10, InterpolantAutomatonStates: 110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 35 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 16 LocationsWithAnnotation, 77 PreInvPairs, 140 NumberOfFragments, 1839 HoareAnnotationTreeSize, 77 FomulaSimplifications, 31133 FormulaSimplificationTreeSizeReduction, 3.1s HoareSimplificationTime, 16 FomulaSimplificationsInter, 17923 FormulaSimplificationTreeSizeReductionInter, 3.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 52.2s InterpolantComputationTime, 629 NumberOfCodeBlocks, 551 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1125 ConstructedInterpolants, 0 QuantifiedInterpolants, 16937 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1482 ConjunctsInSsa, 232 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 3131/3559 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 5, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 19, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 14, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 8, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 36, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 56, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 12, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 19, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 8, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 137, DAG_COMPRESSION_RETAINED_NODES: 64, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (((((((((((((((((((!(unknown-#memory_int-unknown[2][0] == 104) || !(97 == unknown-#memory_int-unknown[2][1])) || !(unknown-#memory_int-unknown[1][0] == 48)) || !(8 == unknown-#length-unknown[2])) || !(#NULL == 0)) || !(2 == unknown-#length-unknown[1])) || !(unknown-#memory_int-unknown[2][5] == 46)) || !(100 == unknown-#memory_int-unknown[2][3])) || !(114 == unknown-#memory_int-unknown[2][2])) || !(\valid[3] == 1)) || !(unknown-#memory_int-unknown[2][6] == 99)) || !(unknown-#length-unknown[3] == 12)) || !(unknown-#memory_int-unknown[2][7] == 0)) || !(\valid[0] == 0)) || !(unknown-#memory_int-unknown[1][1] == 0)) || !(\valid[1] == 1)) || (((((A == q + r && d == p) && 0 <= A) && 1 <= p) && B == 1) && A <= 10)) || !(#NULL == 0)) || !(\valid[2] == 1)) || !(unknown-#memory_int-unknown[2][4] == 50)) || unknown-#StackHeapBarrier-unknown <= 0 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((((((((((((((((!(unknown-#memory_int-unknown[2][0] == 104) || !(97 == unknown-#memory_int-unknown[2][1])) || ((((((d == p && 0 <= A) && A == r) && q == 0) && B == 1) && A <= 10) && 4 <= p)) || !(unknown-#memory_int-unknown[1][0] == 48)) || !(8 == unknown-#length-unknown[2])) || !(#NULL == 0)) || ((((((0 <= A && A == r) && d == 1) && q == 0) && B == 1) && A <= 10) && p == 1)) || !(2 == unknown-#length-unknown[1])) || !(unknown-#memory_int-unknown[2][5] == 46)) || !(100 == unknown-#memory_int-unknown[2][3])) || !(114 == unknown-#memory_int-unknown[2][2])) || !(\valid[3] == 1)) || !(unknown-#memory_int-unknown[2][6] == 99)) || !(unknown-#length-unknown[3] == 12)) || !(unknown-#memory_int-unknown[2][7] == 0)) || !(\valid[0] == 0)) || !(unknown-#memory_int-unknown[1][1] == 0)) || !(\valid[1] == 1)) || !(#NULL == 0)) || ((((((A == r && p == 2) && 1 <= r) && d == 2) && q == 0) && B == 1) && A <= 10)) || !(\valid[2] == 1)) || !(unknown-#memory_int-unknown[2][4] == 50)) || unknown-#StackHeapBarrier-unknown <= 0 RESULT: Ultimate proved your program to be correct! [2023-04-02 23:12:44,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...