/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/egcd2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:53:29,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:53:29,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:53:29,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:53:29,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:53:29,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:53:29,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:53:29,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:53:29,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:53:29,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:53:29,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:53:29,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:53:29,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:53:29,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:53:29,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:53:29,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:53:29,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:53:29,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:53:29,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:53:29,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:53:29,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:53:29,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:53:29,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:53:29,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:53:29,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:53:29,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:53:29,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:53:29,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:53:29,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:53:29,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:53:29,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:53:29,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:53:29,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:53:29,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:53:29,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:53:29,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:53:29,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:53:29,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:53:29,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:53:29,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:53:29,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:53:29,377 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 22:53:29,397 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:53:29,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:53:29,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:53:29,398 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:53:29,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:53:29,399 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:53:29,399 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:53:29,399 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:53:29,399 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:53:29,399 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:53:29,400 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:53:29,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:53:29,400 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:53:29,400 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:53:29,400 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:53:29,400 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:53:29,400 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:53:29,400 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:53:29,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:53:29,401 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:53:29,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:53:29,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:53:29,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:53:29,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:53:29,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:53:29,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:53:29,401 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:53:29,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:53:29,402 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:53:29,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:53:29,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:53:29,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:53:29,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:53:29,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:53:29,402 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:53:29,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:53:29,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:53:29,402 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:53:29,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:53:29,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:53:29,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:53:29,403 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:53:29,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:53:29,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:53:29,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:53:29,563 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:53:29,563 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:53:29,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2023-04-02 22:53:30,569 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:53:30,715 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:53:30,715 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2023-04-02 22:53:30,720 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d92c5aff4/009e8f7be5594473a953ccb6699b7229/FLAGf595e31cd [2023-04-02 22:53:30,730 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d92c5aff4/009e8f7be5594473a953ccb6699b7229 [2023-04-02 22:53:30,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:53:30,733 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:53:30,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:53:30,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:53:30,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:53:30,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:53:30" (1/1) ... [2023-04-02 22:53:30,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a9389e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:53:30, skipping insertion in model container [2023-04-02 22:53:30,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:53:30" (1/1) ... [2023-04-02 22:53:30,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:53:30,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:53:30,840 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2023-04-02 22:53:30,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:53:30,859 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:53:30,867 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/egcd2-ll_valuebound100.c[490,503] [2023-04-02 22:53:30,873 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:53:30,882 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:53:30,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:53:30 WrapperNode [2023-04-02 22:53:30,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:53:30,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:53:30,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:53:30,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:53:30,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:53:30" (1/1) ... [2023-04-02 22:53:30,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:53:30" (1/1) ... [2023-04-02 22:53:30,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:53:30" (1/1) ... [2023-04-02 22:53:30,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:53:30" (1/1) ... [2023-04-02 22:53:30,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:53:30" (1/1) ... [2023-04-02 22:53:30,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:53:30" (1/1) ... [2023-04-02 22:53:30,901 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:53:30" (1/1) ... [2023-04-02 22:53:30,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:53:30" (1/1) ... [2023-04-02 22:53:30,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:53:30,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:53:30,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:53:30,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:53:30,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:53:30" (1/1) ... [2023-04-02 22:53:30,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:53:30,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:53:30,931 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 22:53:30,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 22:53:30,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:53:30,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:53:30,964 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:53:30,964 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:53:30,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:53:30,964 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:53:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:53:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:53:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:53:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:53:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 22:53:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:53:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:53:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:53:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:53:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:53:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:53:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:53:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:53:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:53:31,014 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:53:31,016 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:53:31,132 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:53:31,146 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:53:31,146 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 22:53:31,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:53:31 BoogieIcfgContainer [2023-04-02 22:53:31,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:53:31,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:53:31,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:53:31,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:53:31,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:53:30" (1/3) ... [2023-04-02 22:53:31,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b82f514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:53:31, skipping insertion in model container [2023-04-02 22:53:31,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:53:30" (2/3) ... [2023-04-02 22:53:31,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b82f514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:53:31, skipping insertion in model container [2023-04-02 22:53:31,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:53:31" (3/3) ... [2023-04-02 22:53:31,153 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2023-04-02 22:53:31,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:53:31,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:53:31,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:53:31,207 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;@39eb3d4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:53:31,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:53:31,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 18 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 22:53:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 22:53:31,214 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:53:31,215 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:53:31,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:53:31,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:53:31,218 INFO L85 PathProgramCache]: Analyzing trace with hash -106415626, now seen corresponding path program 1 times [2023-04-02 22:53:31,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:53:31,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256883027] [2023-04-02 22:53:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:31,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:53:31,300 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:53:31,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598417274] [2023-04-02 22:53:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:31,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:31,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:53:31,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:53:31,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 22:53:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:53:31,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 22:53:31,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:53:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 22:53:31,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:53:31,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:53:31,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256883027] [2023-04-02 22:53:31,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:53:31,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598417274] [2023-04-02 22:53:31,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598417274] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:53:31,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:53:31,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 22:53:31,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615472782] [2023-04-02 22:53:31,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:53:31,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 22:53:31,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:53:31,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 22:53:31,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:53:31,428 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 18 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-02 22:53:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:53:31,449 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2023-04-02 22:53:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 22:53:31,451 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 30 [2023-04-02 22:53:31,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:53:31,456 INFO L225 Difference]: With dead ends: 57 [2023-04-02 22:53:31,456 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 22:53:31,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:53:31,461 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:53:31,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:53:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 22:53:31,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-02 22:53:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 22:53:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-04-02 22:53:31,487 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 30 [2023-04-02 22:53:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:53:31,489 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-04-02 22:53:31,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-02 22:53:31,489 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-04-02 22:53:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 22:53:31,490 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:53:31,490 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:53:31,498 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 22:53:31,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 22:53:31,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:53:31,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:53:31,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1527902876, now seen corresponding path program 1 times [2023-04-02 22:53:31,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:53:31,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650537265] [2023-04-02 22:53:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:31,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:53:31,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:53:31,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579284164] [2023-04-02 22:53:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:31,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:31,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:53:31,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:53:31,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 22:53:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:53:31,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 22:53:31,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:53:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 22:53:31,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:53:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 22:53:31,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:53:31,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650537265] [2023-04-02 22:53:31,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:53:31,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579284164] [2023-04-02 22:53:31,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579284164] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:53:31,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2100688321] [2023-04-02 22:53:31,944 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 22:53:31,944 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:53:31,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:53:31,949 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:53:31,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:53:32,011 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:53:32,416 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:53:32,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:53:32,421 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:53:32,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2100688321] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:53:32,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:53:32,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 5] total 18 [2023-04-02 22:53:32,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833691213] [2023-04-02 22:53:32,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:53:32,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 22:53:32,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:53:32,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 22:53:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-04-02 22:53:32,722 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 15 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 22:53:33,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:53:33,448 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-02 22:53:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 22:53:33,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 31 [2023-04-02 22:53:33,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:53:33,449 INFO L225 Difference]: With dead ends: 42 [2023-04-02 22:53:33,449 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 22:53:33,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2023-04-02 22:53:33,451 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 68 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:53:33,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 4 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 22:53:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 22:53:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-02 22:53:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 22:53:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2023-04-02 22:53:33,463 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 31 [2023-04-02 22:53:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:53:33,463 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2023-04-02 22:53:33,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 22:53:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2023-04-02 22:53:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 22:53:33,464 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:53:33,464 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:53:33,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 22:53:33,669 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,SelfDestructingSolverStorable1 [2023-04-02 22:53:33,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:53:33,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:53:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash -115048975, now seen corresponding path program 1 times [2023-04-02 22:53:33,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:53:33,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012019441] [2023-04-02 22:53:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:33,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:53:33,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:53:33,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982604737] [2023-04-02 22:53:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:33,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:33,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:53:33,712 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:53:33,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 22:53:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:53:33,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 22:53:33,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:53:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 22:53:33,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:53:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 22:53:33,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:53:33,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012019441] [2023-04-02 22:53:33,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:53:33,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982604737] [2023-04-02 22:53:33,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982604737] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 22:53:33,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:53:33,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-02 22:53:33,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493158260] [2023-04-02 22:53:33,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:53:33,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:53:33,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:53:33,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:53:33,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-02 22:53:33,862 INFO L87 Difference]: Start difference. First operand 34 states and 45 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-02 22:53:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:53:33,915 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-02 22:53:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:53:33,915 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 32 [2023-04-02 22:53:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:53:33,917 INFO L225 Difference]: With dead ends: 40 [2023-04-02 22:53:33,917 INFO L226 Difference]: Without dead ends: 38 [2023-04-02 22:53:33,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-02 22:53:33,922 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:53:33,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 116 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:53:33,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-02 22:53:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-02 22:53:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 22:53:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-04-02 22:53:33,940 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 32 [2023-04-02 22:53:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:53:33,940 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-04-02 22:53:33,941 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-02 22:53:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-04-02 22:53:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-02 22:53:33,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:53:33,943 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:53:33,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 22:53:34,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:34,149 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:53:34,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:53:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash 479602003, now seen corresponding path program 1 times [2023-04-02 22:53:34,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:53:34,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068780336] [2023-04-02 22:53:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:34,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:53:34,170 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:53:34,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715522106] [2023-04-02 22:53:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:34,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:34,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:53:34,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:53:34,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 22:53:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:53:34,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 22:53:34,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:53:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 22:53:34,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:53:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 22:53:34,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:53:34,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068780336] [2023-04-02 22:53:34,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:53:34,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715522106] [2023-04-02 22:53:34,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715522106] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 22:53:34,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:53:34,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2023-04-02 22:53:34,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830108970] [2023-04-02 22:53:34,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:53:34,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:53:34,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:53:34,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:53:34,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-02 22:53:34,413 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 22:53:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:53:34,459 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-04-02 22:53:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:53:34,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2023-04-02 22:53:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:53:34,461 INFO L225 Difference]: With dead ends: 51 [2023-04-02 22:53:34,461 INFO L226 Difference]: Without dead ends: 49 [2023-04-02 22:53:34,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-04-02 22:53:34,464 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:53:34,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 125 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:53:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-02 22:53:34,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-04-02 22:53:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 22:53:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2023-04-02 22:53:34,487 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 37 [2023-04-02 22:53:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:53:34,487 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2023-04-02 22:53:34,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 22:53:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2023-04-02 22:53:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 22:53:34,488 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:53:34,488 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:53:34,495 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 22:53:34,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:34,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:53:34,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:53:34,693 INFO L85 PathProgramCache]: Analyzing trace with hash 409789169, now seen corresponding path program 1 times [2023-04-02 22:53:34,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:53:34,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888110735] [2023-04-02 22:53:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:34,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:53:34,708 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:53:34,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368998882] [2023-04-02 22:53:34,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:34,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:34,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:53:34,719 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 22:53:34,719 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 22:53:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:53:34,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 22:53:34,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:53:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 22:53:34,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:53:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-02 22:53:34,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:53:34,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888110735] [2023-04-02 22:53:34,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:53:34,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368998882] [2023-04-02 22:53:34,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368998882] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 22:53:34,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:53:34,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2023-04-02 22:53:34,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595980443] [2023-04-02 22:53:34,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:53:34,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:53:34,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:53:34,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:53:34,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-02 22:53:34,947 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 22:53:34,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:53:34,991 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2023-04-02 22:53:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:53:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 42 [2023-04-02 22:53:34,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:53:34,992 INFO L225 Difference]: With dead ends: 55 [2023-04-02 22:53:34,992 INFO L226 Difference]: Without dead ends: 53 [2023-04-02 22:53:34,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-04-02 22:53:34,993 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:53:34,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 116 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:53:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-02 22:53:35,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-04-02 22:53:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 22:53:35,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2023-04-02 22:53:35,021 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 42 [2023-04-02 22:53:35,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:53:35,022 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2023-04-02 22:53:35,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 22:53:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2023-04-02 22:53:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 22:53:35,022 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:53:35,022 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:53:35,029 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 22:53:35,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:35,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:53:35,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:53:35,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1543565357, now seen corresponding path program 1 times [2023-04-02 22:53:35,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:53:35,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709903784] [2023-04-02 22:53:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:35,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:53:35,238 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:53:35,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910202276] [2023-04-02 22:53:35,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:35,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:35,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:53:35,253 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 22:53:35,261 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 22:53:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:53:35,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 22:53:35,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:53:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 22:53:35,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:53:35,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:53:35,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709903784] [2023-04-02 22:53:35,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:53:35,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910202276] [2023-04-02 22:53:35,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910202276] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:53:35,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444612540] [2023-04-02 22:53:35,439 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-02 22:53:35,439 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:53:35,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:53:35,440 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:53:35,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:53:35,452 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:53:35,720 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 22:53:35,727 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:53:35,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:53:35,731 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:53:36,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1909#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:53:36,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:53:36,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:53:36,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-04-02 22:53:36,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156130669] [2023-04-02 22:53:36,269 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 22:53:36,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 22:53:36,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:53:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 22:53:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2023-04-02 22:53:36,270 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-02 22:53:36,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:53:36,356 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2023-04-02 22:53:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 22:53:36,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 47 [2023-04-02 22:53:36,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:53:36,357 INFO L225 Difference]: With dead ends: 59 [2023-04-02 22:53:36,357 INFO L226 Difference]: Without dead ends: 57 [2023-04-02 22:53:36,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2023-04-02 22:53:36,358 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:53:36,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 113 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:53:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-02 22:53:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-04-02 22:53:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 22:53:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2023-04-02 22:53:36,369 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 47 [2023-04-02 22:53:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:53:36,370 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2023-04-02 22:53:36,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-02 22:53:36,370 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2023-04-02 22:53:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 22:53:36,370 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:53:36,370 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:53:36,391 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 22:53:36,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:36,576 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:53:36,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:53:36,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1081154470, now seen corresponding path program 1 times [2023-04-02 22:53:36,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:53:36,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695308269] [2023-04-02 22:53:36,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:36,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:53:36,584 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:53:36,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534933291] [2023-04-02 22:53:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:36,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:36,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:53:36,601 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 22:53:36,602 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 22:53:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:53:36,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 22:53:36,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:53:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-02 22:53:36,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:53:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-02 22:53:36,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:53:36,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695308269] [2023-04-02 22:53:36,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:53:36,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534933291] [2023-04-02 22:53:36,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534933291] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:53:36,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1066109182] [2023-04-02 22:53:36,742 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-02 22:53:36,742 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:53:36,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:53:36,743 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:53:36,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:53:36,756 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:53:42,552 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:53:42,554 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:53:42,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:53:42,557 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:53:45,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2445#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:53:45,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:53:45,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:53:45,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-04-02 22:53:45,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90869434] [2023-04-02 22:53:45,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:53:45,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 22:53:45,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:53:45,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 22:53:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2023-04-02 22:53:45,935 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-02 22:53:46,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:53:46,119 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2023-04-02 22:53:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:53:46,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 56 [2023-04-02 22:53:46,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:53:46,120 INFO L225 Difference]: With dead ends: 103 [2023-04-02 22:53:46,120 INFO L226 Difference]: Without dead ends: 95 [2023-04-02 22:53:46,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2023-04-02 22:53:46,121 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 34 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:53:46,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 161 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:53:46,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-02 22:53:46,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2023-04-02 22:53:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-04-02 22:53:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 119 transitions. [2023-04-02 22:53:46,140 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 119 transitions. Word has length 56 [2023-04-02 22:53:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:53:46,140 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 119 transitions. [2023-04-02 22:53:46,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-02 22:53:46,140 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 119 transitions. [2023-04-02 22:53:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-02 22:53:46,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:53:46,142 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:53:46,146 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 22:53:46,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:46,346 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:53:46,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:53:46,346 INFO L85 PathProgramCache]: Analyzing trace with hash 167472073, now seen corresponding path program 1 times [2023-04-02 22:53:46,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:53:46,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747168245] [2023-04-02 22:53:46,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:46,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:53:46,369 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:53:46,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119093265] [2023-04-02 22:53:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:46,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:46,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:53:46,377 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 22:53:46,384 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 22:53:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:53:46,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-02 22:53:46,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:53:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-02 22:53:46,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:53:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-02 22:53:46,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:53:46,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747168245] [2023-04-02 22:53:46,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:53:46,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119093265] [2023-04-02 22:53:46,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119093265] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:53:46,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2057195884] [2023-04-02 22:53:46,629 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-02 22:53:46,629 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:53:46,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:53:46,629 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:53:46,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:53:46,638 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:53:51,681 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:53:51,683 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:53:51,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:53:51,685 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:53:55,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3159#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:53:55,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:53:55,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:53:55,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-04-02 22:53:55,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273604693] [2023-04-02 22:53:55,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:53:55,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 22:53:55,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:53:55,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 22:53:55,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 22:53:55,130 INFO L87 Difference]: Start difference. First operand 86 states and 119 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-04-02 22:53:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:53:55,430 INFO L93 Difference]: Finished difference Result 129 states and 184 transitions. [2023-04-02 22:53:55,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 22:53:55,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 62 [2023-04-02 22:53:55,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:53:55,448 INFO L225 Difference]: With dead ends: 129 [2023-04-02 22:53:55,448 INFO L226 Difference]: Without dead ends: 125 [2023-04-02 22:53:55,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 22:53:55,449 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 41 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:53:55,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 244 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 22:53:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-04-02 22:53:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2023-04-02 22:53:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-04-02 22:53:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 127 transitions. [2023-04-02 22:53:55,471 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 127 transitions. Word has length 62 [2023-04-02 22:53:55,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:53:55,471 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 127 transitions. [2023-04-02 22:53:55,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-04-02 22:53:55,471 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 127 transitions. [2023-04-02 22:53:55,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 22:53:55,472 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:53:55,472 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:53:55,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-02 22:53:55,677 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,SelfDestructingSolverStorable7 [2023-04-02 22:53:55,677 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:53:55,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:53:55,678 INFO L85 PathProgramCache]: Analyzing trace with hash -21023173, now seen corresponding path program 2 times [2023-04-02 22:53:55,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:53:55,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131363666] [2023-04-02 22:53:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:53:55,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:53:55,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:53:55,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119151868] [2023-04-02 22:53:55,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:53:55,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:53:55,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:53:55,686 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 22:53:55,688 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 22:53:55,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 22:53:55,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:53:55,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-02 22:53:55,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:53:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-04-02 22:53:55,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:53:56,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:53:56,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131363666] [2023-04-02 22:53:56,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:53:56,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119151868] [2023-04-02 22:53:56,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119151868] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:53:56,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [914642605] [2023-04-02 22:53:56,029 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-02 22:53:56,029 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:53:56,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:53:56,029 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:53:56,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:53:56,053 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:54:01,315 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:54:01,317 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:54:01,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:54:01,320 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:54:05,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3825#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:54:05,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:54:05,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:54:05,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-02 22:54:05,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554354011] [2023-04-02 22:54:05,265 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 22:54:05,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 22:54:05,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:54:05,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 22:54:05,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 22:54:05,266 INFO L87 Difference]: Start difference. First operand 93 states and 127 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-02 22:54:05,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:54:05,491 INFO L93 Difference]: Finished difference Result 125 states and 166 transitions. [2023-04-02 22:54:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 22:54:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 67 [2023-04-02 22:54:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:54:05,494 INFO L225 Difference]: With dead ends: 125 [2023-04-02 22:54:05,494 INFO L226 Difference]: Without dead ends: 123 [2023-04-02 22:54:05,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 22:54:05,496 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 27 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:54:05,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 124 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 22:54:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-04-02 22:54:05,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2023-04-02 22:54:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 64 states have (on average 1.171875) internal successors, (75), 66 states have internal predecessors, (75), 44 states have call successors, (44), 12 states have call predecessors, (44), 11 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2023-04-02 22:54:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 161 transitions. [2023-04-02 22:54:05,538 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 161 transitions. Word has length 67 [2023-04-02 22:54:05,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:54:05,538 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 161 transitions. [2023-04-02 22:54:05,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-02 22:54:05,538 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 161 transitions. [2023-04-02 22:54:05,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 22:54:05,543 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:54:05,543 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:54:05,548 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 22:54:05,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:54:05,747 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:54:05,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:54:05,747 INFO L85 PathProgramCache]: Analyzing trace with hash 24066761, now seen corresponding path program 3 times [2023-04-02 22:54:05,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:54:05,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009996847] [2023-04-02 22:54:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:54:05,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:54:05,759 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:54:05,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382355646] [2023-04-02 22:54:05,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:54:05,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:54:05,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:54:05,773 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:54:05,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 22:54:05,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:54:05,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:54:05,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-02 22:54:05,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:54:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-04-02 22:54:06,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:54:06,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:54:06,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009996847] [2023-04-02 22:54:06,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:54:06,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382355646] [2023-04-02 22:54:06,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382355646] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:54:06,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1407472792] [2023-04-02 22:54:06,073 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-02 22:54:06,073 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:54:06,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:54:06,074 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:54:06,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:54:06,083 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:54:11,010 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:54:11,012 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:54:11,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:54:11,014 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:54:15,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4474#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:54:15,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:54:15,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:54:15,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-02 22:54:15,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27988280] [2023-04-02 22:54:15,033 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 22:54:15,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 22:54:15,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:54:15,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 22:54:15,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2023-04-02 22:54:15,035 INFO L87 Difference]: Start difference. First operand 120 states and 161 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-02 22:54:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:54:15,186 INFO L93 Difference]: Finished difference Result 129 states and 169 transitions. [2023-04-02 22:54:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 22:54:15,186 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 72 [2023-04-02 22:54:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:54:15,187 INFO L225 Difference]: With dead ends: 129 [2023-04-02 22:54:15,187 INFO L226 Difference]: Without dead ends: 127 [2023-04-02 22:54:15,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 22:54:15,188 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:54:15,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 145 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:54:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-04-02 22:54:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2023-04-02 22:54:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 67 states have (on average 1.164179104477612) internal successors, (78), 69 states have internal predecessors, (78), 44 states have call successors, (44), 13 states have call predecessors, (44), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2023-04-02 22:54:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 164 transitions. [2023-04-02 22:54:15,212 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 164 transitions. Word has length 72 [2023-04-02 22:54:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:54:15,213 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 164 transitions. [2023-04-02 22:54:15,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-02 22:54:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 164 transitions. [2023-04-02 22:54:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-02 22:54:15,214 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:54:15,214 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:54:15,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 22:54:15,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 22:54:15,419 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:54:15,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:54:15,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1114380903, now seen corresponding path program 1 times [2023-04-02 22:54:15,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:54:15,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208252831] [2023-04-02 22:54:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:54:15,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:54:15,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:54:15,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206335095] [2023-04-02 22:54:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:54:15,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:54:15,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:54:15,439 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:54:15,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 22:54:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:54:15,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-02 22:54:15,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:54:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-04-02 22:54:15,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:54:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-04-02 22:54:16,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:54:16,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208252831] [2023-04-02 22:54:16,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:54:16,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206335095] [2023-04-02 22:54:16,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206335095] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:54:16,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2020190517] [2023-04-02 22:54:16,323 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-02 22:54:16,323 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:54:16,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:54:16,323 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:54:16,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:54:16,340 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:54:20,300 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 22:54:20,303 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:54:20,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:54:20,305 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:54:23,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5378#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:54:23,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:54:23,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:54:23,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-04-02 22:54:23,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158563046] [2023-04-02 22:54:23,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:54:23,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 22:54:23,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:54:23,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 22:54:23,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 22:54:23,136 INFO L87 Difference]: Start difference. First operand 124 states and 164 transitions. Second operand has 20 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2023-04-02 22:54:31,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:54:31,824 INFO L93 Difference]: Finished difference Result 209 states and 296 transitions. [2023-04-02 22:54:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-02 22:54:31,825 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 78 [2023-04-02 22:54:31,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:54:31,826 INFO L225 Difference]: With dead ends: 209 [2023-04-02 22:54:31,826 INFO L226 Difference]: Without dead ends: 205 [2023-04-02 22:54:31,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=464, Invalid=3076, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 22:54:31,827 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 90 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 22:54:31,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 308 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 22:54:31,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-04-02 22:54:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2023-04-02 22:54:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 105 states have internal predecessors, (125), 81 states have call successors, (81), 16 states have call predecessors, (81), 15 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-04-02 22:54:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 285 transitions. [2023-04-02 22:54:31,889 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 285 transitions. Word has length 78 [2023-04-02 22:54:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:54:31,890 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 285 transitions. [2023-04-02 22:54:31,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2023-04-02 22:54:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 285 transitions. [2023-04-02 22:54:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-02 22:54:31,890 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:54:31,891 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:54:31,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 22:54:32,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 22:54:32,110 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:54:32,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:54:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2003978801, now seen corresponding path program 4 times [2023-04-02 22:54:32,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:54:32,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381223410] [2023-04-02 22:54:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:54:32,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:54:32,117 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:54:32,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474484194] [2023-04-02 22:54:32,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:54:32,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:54:32,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:54:32,118 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:54:32,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 22:54:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:54:32,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 22:54:32,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:54:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-04-02 22:54:32,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:54:32,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:54:32,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381223410] [2023-04-02 22:54:32,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:54:32,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474484194] [2023-04-02 22:54:32,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474484194] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:54:32,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:54:32,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:54:32,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813904264] [2023-04-02 22:54:32,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:54:32,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:54:32,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:54:32,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:54:32,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:54:32,194 INFO L87 Difference]: Start difference. First operand 201 states and 285 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-04-02 22:54:32,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:54:32,305 INFO L93 Difference]: Finished difference Result 254 states and 357 transitions. [2023-04-02 22:54:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:54:32,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 92 [2023-04-02 22:54:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:54:32,307 INFO L225 Difference]: With dead ends: 254 [2023-04-02 22:54:32,307 INFO L226 Difference]: Without dead ends: 182 [2023-04-02 22:54:32,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 22:54:32,308 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:54:32,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 137 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:54:32,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-04-02 22:54:32,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2023-04-02 22:54:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 65 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2023-04-02 22:54:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 228 transitions. [2023-04-02 22:54:32,357 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 228 transitions. Word has length 92 [2023-04-02 22:54:32,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:54:32,357 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 228 transitions. [2023-04-02 22:54:32,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-04-02 22:54:32,357 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 228 transitions. [2023-04-02 22:54:32,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-02 22:54:32,358 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:54:32,358 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:54:32,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-02 22:54:32,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 22:54:32,563 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:54:32,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:54:32,563 INFO L85 PathProgramCache]: Analyzing trace with hash -652222968, now seen corresponding path program 1 times [2023-04-02 22:54:32,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:54:32,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090852022] [2023-04-02 22:54:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:54:32,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:54:32,574 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:54:32,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072532727] [2023-04-02 22:54:32,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:54:32,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:54:32,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:54:32,581 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:54:32,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 22:54:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:54:32,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-02 22:54:32,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:54:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 53 proven. 22 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2023-04-02 22:54:33,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:54:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-02 22:54:36,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:54:36,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090852022] [2023-04-02 22:54:36,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:54:36,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072532727] [2023-04-02 22:54:36,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072532727] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:54:36,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492474155] [2023-04-02 22:54:36,104 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-02 22:54:36,104 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:54:36,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:54:36,105 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:54:36,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:54:36,120 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:54:40,262 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 22:54:40,265 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:54:40,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:54:40,267 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:54:45,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7633#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:54:45,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:54:45,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:54:45,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-04-02 22:54:45,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666075431] [2023-04-02 22:54:45,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:54:45,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 22:54:45,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:54:45,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 22:54:45,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1334, Unknown=1, NotChecked=0, Total=1560 [2023-04-02 22:54:45,961 INFO L87 Difference]: Start difference. First operand 168 states and 228 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 11 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2023-04-02 22:54:59,539 WARN L223 SmtUtils]: Spent 11.41s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:55:05,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:55:07,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:55:14,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:55:19,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:55:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:24,865 INFO L93 Difference]: Finished difference Result 210 states and 288 transitions. [2023-04-02 22:55:24,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 22:55:24,866 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 11 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 94 [2023-04-02 22:55:24,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:24,867 INFO L225 Difference]: With dead ends: 210 [2023-04-02 22:55:24,867 INFO L226 Difference]: Without dead ends: 208 [2023-04-02 22:55:24,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=488, Invalid=2703, Unknown=1, NotChecked=0, Total=3192 [2023-04-02 22:55:24,868 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 86 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 89 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:24,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 165 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 625 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2023-04-02 22:55:24,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-04-02 22:55:24,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 198. [2023-04-02 22:55:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 106 states have internal predecessors, (119), 77 states have call successors, (77), 17 states have call predecessors, (77), 16 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2023-04-02 22:55:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 271 transitions. [2023-04-02 22:55:24,957 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 271 transitions. Word has length 94 [2023-04-02 22:55:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:24,957 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 271 transitions. [2023-04-02 22:55:24,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 11 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2023-04-02 22:55:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 271 transitions. [2023-04-02 22:55:24,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-02 22:55:24,958 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:24,958 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:24,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 22:55:25,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 22:55:25,162 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:25,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:25,163 INFO L85 PathProgramCache]: Analyzing trace with hash -752375235, now seen corresponding path program 2 times [2023-04-02 22:55:25,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:25,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866624895] [2023-04-02 22:55:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:25,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:25,180 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:25,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810565500] [2023-04-02 22:55:25,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:55:25,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:25,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:25,183 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:55:25,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 22:55:25,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 22:55:25,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:55:25,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-02 22:55:25,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 33 proven. 32 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2023-04-02 22:55:25,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:55:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2023-04-02 22:55:26,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:26,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866624895] [2023-04-02 22:55:27,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:27,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810565500] [2023-04-02 22:55:27,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810565500] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:55:27,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [625520504] [2023-04-02 22:55:27,001 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-02 22:55:27,001 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:55:27,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:55:27,002 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:55:27,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:55:27,010 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:55:30,970 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 22:55:30,973 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:55:30,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:55:30,975 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:55:33,208 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9022#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:55:33,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:55:33,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:55:33,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2023-04-02 22:55:33,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761121356] [2023-04-02 22:55:33,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:55:33,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 22:55:33,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:33,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 22:55:33,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 22:55:33,211 INFO L87 Difference]: Start difference. First operand 198 states and 271 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2023-04-02 22:55:45,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:45,571 INFO L93 Difference]: Finished difference Result 322 states and 466 transitions. [2023-04-02 22:55:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-02 22:55:45,572 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) Word has length 111 [2023-04-02 22:55:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:45,574 INFO L225 Difference]: With dead ends: 322 [2023-04-02 22:55:45,574 INFO L226 Difference]: Without dead ends: 320 [2023-04-02 22:55:45,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=635, Invalid=3787, Unknown=0, NotChecked=0, Total=4422 [2023-04-02 22:55:45,575 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 102 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:45,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 316 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-02 22:55:45,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-04-02 22:55:45,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 285. [2023-04-02 22:55:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 144 states have (on average 1.1805555555555556) internal successors, (170), 146 states have internal predecessors, (170), 121 states have call successors, (121), 20 states have call predecessors, (121), 19 states have return successors, (119), 118 states have call predecessors, (119), 119 states have call successors, (119) [2023-04-02 22:55:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 410 transitions. [2023-04-02 22:55:45,763 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 410 transitions. Word has length 111 [2023-04-02 22:55:45,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:45,764 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 410 transitions. [2023-04-02 22:55:45,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2023-04-02 22:55:45,765 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 410 transitions. [2023-04-02 22:55:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-02 22:55:45,767 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:45,767 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:45,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 22:55:45,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:45,976 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:45,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:45,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1401725166, now seen corresponding path program 3 times [2023-04-02 22:55:45,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:45,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222272094] [2023-04-02 22:55:45,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:45,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:45,984 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:45,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339853043] [2023-04-02 22:55:45,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:55:45,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:45,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:45,987 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:55:45,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 22:55:46,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:55:46,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:55:46,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 59 conjunts are in the unsatisfiable core [2023-04-02 22:55:46,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2023-04-02 22:55:46,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:55:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2023-04-02 22:55:47,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:47,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222272094] [2023-04-02 22:55:47,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:47,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339853043] [2023-04-02 22:55:47,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339853043] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:55:47,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [805214962] [2023-04-02 22:55:47,600 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-02 22:55:47,600 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:55:47,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:55:47,600 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:55:47,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:55:47,613 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:55:51,843 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 22:55:51,859 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:55:51,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:55:51,861 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:55:54,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10788#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:55:54,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:55:54,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:55:54,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2023-04-02 22:55:54,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8804182] [2023-04-02 22:55:54,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:55:54,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 22:55:54,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:54,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 22:55:54,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1572, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 22:55:54,167 INFO L87 Difference]: Start difference. First operand 285 states and 410 transitions. Second operand has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2023-04-02 22:56:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:56:05,351 INFO L93 Difference]: Finished difference Result 422 states and 615 transitions. [2023-04-02 22:56:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-02 22:56:05,361 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) Word has length 114 [2023-04-02 22:56:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:56:05,363 INFO L225 Difference]: With dead ends: 422 [2023-04-02 22:56:05,363 INFO L226 Difference]: Without dead ends: 420 [2023-04-02 22:56:05,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=557, Invalid=3475, Unknown=0, NotChecked=0, Total=4032 [2023-04-02 22:56:05,365 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 87 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-04-02 22:56:05,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 305 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-04-02 22:56:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2023-04-02 22:56:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 394. [2023-04-02 22:56:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 200 states have (on average 1.185) internal successors, (237), 203 states have internal predecessors, (237), 169 states have call successors, (169), 25 states have call predecessors, (169), 24 states have return successors, (167), 165 states have call predecessors, (167), 167 states have call successors, (167) [2023-04-02 22:56:05,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 573 transitions. [2023-04-02 22:56:05,612 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 573 transitions. Word has length 114 [2023-04-02 22:56:05,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:56:05,612 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 573 transitions. [2023-04-02 22:56:05,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2023-04-02 22:56:05,612 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 573 transitions. [2023-04-02 22:56:05,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-02 22:56:05,613 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:56:05,613 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:56:05,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-02 22:56:05,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 22:56:05,814 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:56:05,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:56:05,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1869127778, now seen corresponding path program 2 times [2023-04-02 22:56:05,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:56:05,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311239282] [2023-04-02 22:56:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:56:05,822 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:56:05,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347010882] [2023-04-02 22:56:05,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:56:05,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:56:05,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:56:05,831 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:56:05,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 22:56:05,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 22:56:05,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:56:05,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 70 conjunts are in the unsatisfiable core [2023-04-02 22:56:05,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:56:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 37 proven. 43 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-04-02 22:56:06,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:56:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2023-04-02 22:56:07,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:56:07,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311239282] [2023-04-02 22:56:07,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:56:07,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347010882] [2023-04-02 22:56:07,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347010882] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:56:07,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485890572] [2023-04-02 22:56:07,965 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-02 22:56:07,965 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:56:07,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:56:07,966 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:56:07,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:56:07,974 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:56:12,073 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 22:56:12,076 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:56:12,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:56:12,078 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:56:15,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12957#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:56:15,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:56:15,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:56:15,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2023-04-02 22:56:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968623840] [2023-04-02 22:56:15,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:56:15,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 22:56:15,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:56:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 22:56:15,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1819, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 22:56:15,451 INFO L87 Difference]: Start difference. First operand 394 states and 573 transitions. Second operand has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 13 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2023-04-02 22:56:20,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:56:40,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:56:40,899 INFO L93 Difference]: Finished difference Result 496 states and 722 transitions. [2023-04-02 22:56:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-02 22:56:40,900 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 13 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) Word has length 125 [2023-04-02 22:56:40,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:56:40,906 INFO L225 Difference]: With dead ends: 496 [2023-04-02 22:56:40,907 INFO L226 Difference]: Without dead ends: 488 [2023-04-02 22:56:40,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=968, Invalid=6688, Unknown=0, NotChecked=0, Total=7656 [2023-04-02 22:56:40,908 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 187 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:56:40,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 363 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 15.2s Time] [2023-04-02 22:56:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-04-02 22:56:41,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 472. [2023-04-02 22:56:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 238 states have (on average 1.1764705882352942) internal successors, (280), 242 states have internal predecessors, (280), 205 states have call successors, (205), 29 states have call predecessors, (205), 28 states have return successors, (203), 200 states have call predecessors, (203), 203 states have call successors, (203) [2023-04-02 22:56:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 688 transitions. [2023-04-02 22:56:41,289 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 688 transitions. Word has length 125 [2023-04-02 22:56:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:56:41,289 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 688 transitions. [2023-04-02 22:56:41,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 13 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2023-04-02 22:56:41,289 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 688 transitions. [2023-04-02 22:56:41,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-02 22:56:41,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:56:41,292 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:56:41,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-02 22:56:41,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 22:56:41,498 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:56:41,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:56:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash 597681873, now seen corresponding path program 4 times [2023-04-02 22:56:41,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:56:41,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978102226] [2023-04-02 22:56:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:56:41,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:56:41,506 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:56:41,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502262873] [2023-04-02 22:56:41,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:56:41,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:56:41,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:56:41,509 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:56:41,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-02 22:56:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:56:41,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 74 conjunts are in the unsatisfiable core [2023-04-02 22:56:41,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:56:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 93 proven. 67 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2023-04-02 22:56:43,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:56:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2023-04-02 22:56:48,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:56:48,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978102226] [2023-04-02 22:56:48,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:56:48,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502262873] [2023-04-02 22:56:48,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502262873] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:56:48,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [538937456] [2023-04-02 22:56:48,061 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-02 22:56:48,061 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:56:48,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:56:48,061 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:56:48,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:56:48,071 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:56:52,326 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 22:56:52,328 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:56:52,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:56:52,330 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:57:02,096 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15518#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:57:02,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:57:02,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:57:02,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2023-04-02 22:57:02,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48565789] [2023-04-02 22:57:02,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:57:02,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-02 22:57:02,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:57:02,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-02 22:57:02,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2019, Unknown=1, NotChecked=0, Total=2352 [2023-04-02 22:57:02,098 INFO L87 Difference]: Start difference. First operand 472 states and 688 transitions. Second operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 15 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (49), 15 states have call predecessors, (49), 14 states have call successors, (49) [2023-04-02 22:57:05,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:57:17,613 WARN L223 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:57:23,289 WARN L223 SmtUtils]: Spent 5.56s on a formula simplification that was a NOOP. DAG size: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:57:25,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:58:03,237 WARN L223 SmtUtils]: Spent 37.37s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)