/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/fermat1-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:58:37,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:58:37,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:58:37,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:58:37,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:58:37,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:58:37,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:58:37,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:58:37,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:58:37,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:58:37,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:58:37,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:58:37,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:58:37,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:58:37,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:58:37,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:58:37,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:58:37,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:58:37,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:58:37,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:58:37,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:58:37,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:58:37,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:58:37,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:58:38,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:58:38,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:58:38,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:58:38,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:58:38,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:58:38,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:58:38,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:58:38,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:58:38,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:58:38,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:58:38,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:58:38,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:58:38,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:58:38,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:58:38,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:58:38,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:58:38,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:58:38,006 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 22:58:38,021 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:58:38,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:58:38,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:58:38,022 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:58:38,022 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:58:38,022 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:58:38,022 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:58:38,022 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:58:38,023 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:58:38,023 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:58:38,023 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:58:38,023 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:58:38,023 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:58:38,023 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:58:38,023 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:58:38,024 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:58:38,024 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:58:38,024 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:58:38,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:58:38,025 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:58:38,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:58:38,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:58:38,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:58:38,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:58:38,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:58:38,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:58:38,025 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:58:38,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:58:38,025 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:58:38,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:58:38,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:58:38,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:58:38,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:58:38,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:58:38,026 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:58:38,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:58:38,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:58:38,026 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:58:38,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:58:38,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:58:38,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:58:38,026 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:58:38,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:58:38,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:58:38,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:58:38,240 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:58:38,241 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:58:38,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2023-04-02 22:58:39,164 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:58:39,307 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:58:39,307 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2023-04-02 22:58:39,312 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/052596f17/d31a35b29e404f36a38cb0a19e23d9fb/FLAG376d97e4d [2023-04-02 22:58:39,326 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/052596f17/d31a35b29e404f36a38cb0a19e23d9fb [2023-04-02 22:58:39,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:58:39,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:58:39,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:58:39,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:58:39,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:58:39,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:58:39" (1/1) ... [2023-04-02 22:58:39,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@602e6191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:58:39, skipping insertion in model container [2023-04-02 22:58:39,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:58:39" (1/1) ... [2023-04-02 22:58:39,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:58:39,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:58:39,438 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/fermat1-ll_unwindbound50.c[535,548] [2023-04-02 22:58:39,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:58:39,456 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:58:39,463 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/fermat1-ll_unwindbound50.c[535,548] [2023-04-02 22:58:39,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:58:39,482 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:58:39,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:58:39 WrapperNode [2023-04-02 22:58:39,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:58:39,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:58:39,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:58:39,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:58:39,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:58:39" (1/1) ... [2023-04-02 22:58:39,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:58:39" (1/1) ... [2023-04-02 22:58:39,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:58:39" (1/1) ... [2023-04-02 22:58:39,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:58:39" (1/1) ... [2023-04-02 22:58:39,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:58:39" (1/1) ... [2023-04-02 22:58:39,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:58:39" (1/1) ... [2023-04-02 22:58:39,516 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:58:39" (1/1) ... [2023-04-02 22:58:39,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:58:39" (1/1) ... [2023-04-02 22:58:39,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:58:39,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:58:39,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:58:39,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:58:39,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:58:39" (1/1) ... [2023-04-02 22:58:39,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:58:39,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:39,548 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 22:58:39,549 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 22:58:39,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:58:39,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:58:39,581 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:58:39,581 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:58:39,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:58:39,582 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:58:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:58:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:58:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:58:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:58:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 22:58:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:58:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:58:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:58:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:58:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:58:39,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:58:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:58:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:58:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:58:39,633 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:58:39,634 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:58:39,768 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:58:39,793 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:58:39,793 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 22:58:39,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:58:39 BoogieIcfgContainer [2023-04-02 22:58:39,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:58:39,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:58:39,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:58:39,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:58:39,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:58:39" (1/3) ... [2023-04-02 22:58:39,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e945cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:58:39, skipping insertion in model container [2023-04-02 22:58:39,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:58:39" (2/3) ... [2023-04-02 22:58:39,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e945cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:58:39, skipping insertion in model container [2023-04-02 22:58:39,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:58:39" (3/3) ... [2023-04-02 22:58:39,800 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.c [2023-04-02 22:58:39,811 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:58:39,811 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:58:39,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:58:39,846 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;@1566af3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:58:39,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:58:39,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 22:58:39,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 22:58:39,854 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:58:39,854 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:58:39,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:58:39,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:58:39,858 INFO L85 PathProgramCache]: Analyzing trace with hash -618958070, now seen corresponding path program 1 times [2023-04-02 22:58:39,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:58:39,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34840990] [2023-04-02 22:58:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:39,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:58:39,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:58:39,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943914158] [2023-04-02 22:58:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:39,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:58:39,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:39,939 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 22:58:39,940 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 22:58:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:58:40,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 22:58:40,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:58:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:58:40,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:58:40,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:58:40,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34840990] [2023-04-02 22:58:40,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:58:40,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943914158] [2023-04-02 22:58:40,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943914158] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:58:40,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:58:40,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 22:58:40,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365767265] [2023-04-02 22:58:40,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:58:40,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 22:58:40,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:58:40,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 22:58:40,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:58:40,044 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:58:40,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:58:40,061 INFO L93 Difference]: Finished difference Result 56 states and 85 transitions. [2023-04-02 22:58:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 22:58:40,062 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-04-02 22:58:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:58:40,067 INFO L225 Difference]: With dead ends: 56 [2023-04-02 22:58:40,067 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 22:58:40,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 22:58:40,071 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:58:40,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:58:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 22:58:40,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-02 22:58:40,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 22:58:40,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2023-04-02 22:58:40,093 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 17 [2023-04-02 22:58:40,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:58:40,094 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2023-04-02 22:58:40,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:58:40,095 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2023-04-02 22:58:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 22:58:40,095 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:58:40,096 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:58:40,103 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 22:58:40,300 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 22:58:40,301 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:58:40,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:58:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash 784266871, now seen corresponding path program 1 times [2023-04-02 22:58:40,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:58:40,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318147096] [2023-04-02 22:58:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:40,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:58:40,317 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:58:40,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008906786] [2023-04-02 22:58:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:40,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:58:40,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:40,322 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 22:58:40,323 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 22:58:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:58:40,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 22:58:40,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:58:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:58:40,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:58:40,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:58:40,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318147096] [2023-04-02 22:58:40,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:58:40,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008906786] [2023-04-02 22:58:40,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008906786] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:58:40,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:58:40,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 22:58:40,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104698770] [2023-04-02 22:58:40,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:58:40,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 22:58:40,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:58:40,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 22:58:40,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:58:40,438 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:58:40,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:58:40,458 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2023-04-02 22:58:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 22:58:40,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2023-04-02 22:58:40,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:58:40,459 INFO L225 Difference]: With dead ends: 38 [2023-04-02 22:58:40,459 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 22:58:40,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:58:40,460 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:58:40,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:58:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 22:58:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-02 22:58:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 22:58:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-04-02 22:58:40,466 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 18 [2023-04-02 22:58:40,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:58:40,466 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-04-02 22:58:40,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:58:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-04-02 22:58:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 22:58:40,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:58:40,467 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:58:40,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 22:58:40,673 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 22:58:40,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:58:40,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:58:40,682 INFO L85 PathProgramCache]: Analyzing trace with hash 785935167, now seen corresponding path program 1 times [2023-04-02 22:58:40,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:58:40,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822789627] [2023-04-02 22:58:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:40,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:58:40,694 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:58:40,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653282550] [2023-04-02 22:58:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:40,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:58:40,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:40,696 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 22:58:40,698 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 22:58:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:58:40,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 22:58:40,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:58:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:58:40,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:58:40,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:58:40,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822789627] [2023-04-02 22:58:40,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:58:40,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653282550] [2023-04-02 22:58:40,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653282550] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:58:40,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:58:40,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:58:40,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941077919] [2023-04-02 22:58:40,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:58:40,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:58:40,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:58:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:58:40,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:58:40,837 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:58:42,978 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 22:58:44,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:58:47,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:58:49,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:58:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:58:49,592 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2023-04-02 22:58:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 22:58:49,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 18 [2023-04-02 22:58:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:58:49,593 INFO L225 Difference]: With dead ends: 50 [2023-04-02 22:58:49,593 INFO L226 Difference]: Without dead ends: 48 [2023-04-02 22:58:49,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 22:58:49,594 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-04-02 22:58:49,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 90 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2023-04-02 22:58:49,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-02 22:58:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-04-02 22:58:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 22:58:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2023-04-02 22:58:49,604 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 18 [2023-04-02 22:58:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:58:49,604 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2023-04-02 22:58:49,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:58:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2023-04-02 22:58:49,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 22:58:49,604 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:58:49,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:58:49,616 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 22:58:49,809 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 22:58:49,810 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:58:49,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:58:49,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1640235703, now seen corresponding path program 1 times [2023-04-02 22:58:49,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:58:49,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834218370] [2023-04-02 22:58:49,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:49,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:58:49,837 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:58:49,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077545865] [2023-04-02 22:58:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:49,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:58:49,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:49,838 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 22:58:49,840 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 22:58:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:58:49,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 22:58:49,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:58:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:58:49,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:58:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:58:50,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:58:50,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834218370] [2023-04-02 22:58:50,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:58:50,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077545865] [2023-04-02 22:58:50,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077545865] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:58:50,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176679097] [2023-04-02 22:58:50,033 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 22:58:50,033 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:58:50,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:58:50,038 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:58:50,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:58:50,082 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:58:50,292 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-04-02 22:58:50,303 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:58:50,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:58:50,309 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:58:50,726 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '721#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= ~counter~0 1) (= |#NULL.base| 0))' at error location [2023-04-02 22:58:50,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:58:50,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:58:50,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-04-02 22:58:50,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853681302] [2023-04-02 22:58:50,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:58:50,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 22:58:50,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:58:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 22:58:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-04-02 22:58:50,728 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 22:58:50,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:58:50,842 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-04-02 22:58:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:58:50,843 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 24 [2023-04-02 22:58:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:58:50,843 INFO L225 Difference]: With dead ends: 54 [2023-04-02 22:58:50,843 INFO L226 Difference]: Without dead ends: 49 [2023-04-02 22:58:50,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2023-04-02 22:58:50,844 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:58:50,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 105 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:58:50,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-02 22:58:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-04-02 22:58:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 22:58:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2023-04-02 22:58:50,858 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 24 [2023-04-02 22:58:50,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:58:50,858 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2023-04-02 22:58:50,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 22:58:50,858 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2023-04-02 22:58:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 22:58:50,859 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:58:50,859 INFO L195 NwaCegarLoop]: trace histogram [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 22:58:50,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 22:58:51,065 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 22:58:51,065 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:58:51,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:58:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1522257940, now seen corresponding path program 1 times [2023-04-02 22:58:51,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:58:51,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867878437] [2023-04-02 22:58:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:51,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:58:51,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:58:51,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313415647] [2023-04-02 22:58:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:51,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:58:51,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:51,075 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 22:58:51,077 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 22:58:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:58:51,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 22:58:51,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:58:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:58:51,152 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:58:51,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:58:51,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867878437] [2023-04-02 22:58:51,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:58:51,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313415647] [2023-04-02 22:58:51,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313415647] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:58:51,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:58:51,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:58:51,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891333737] [2023-04-02 22:58:51,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:58:51,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:58:51,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:58:51,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:58:51,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:58:51,154 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 22:58:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:58:51,182 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2023-04-02 22:58:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 22:58:51,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2023-04-02 22:58:51,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:58:51,184 INFO L225 Difference]: With dead ends: 94 [2023-04-02 22:58:51,184 INFO L226 Difference]: Without dead ends: 57 [2023-04-02 22:58:51,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:58:51,186 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:58:51,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:58:51,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-02 22:58:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-04-02 22:58:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 22:58:51,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2023-04-02 22:58:51,209 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 30 [2023-04-02 22:58:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:58:51,210 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2023-04-02 22:58:51,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 22:58:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2023-04-02 22:58:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 22:58:51,211 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:58:51,212 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-04-02 22:58:51,218 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 22:58:51,416 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 22:58:51,416 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:58:51,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:58:51,417 INFO L85 PathProgramCache]: Analyzing trace with hash -645286350, now seen corresponding path program 1 times [2023-04-02 22:58:51,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:58:51,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446801957] [2023-04-02 22:58:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:51,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:58:51,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:58:51,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528223161] [2023-04-02 22:58:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:51,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:58:51,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:51,425 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 22:58:51,427 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 22:58:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:58:51,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 22:58:51,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:58:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:58:51,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:58:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 22:58:51,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:58:51,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446801957] [2023-04-02 22:58:51,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:58:51,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528223161] [2023-04-02 22:58:51,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528223161] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 22:58:51,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:58:51,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-04-02 22:58:51,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811461536] [2023-04-02 22:58:51,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:58:51,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 22:58:51,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:58:51,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 22:58:51,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 22:58:51,548 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-02 22:58:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:58:51,579 INFO L93 Difference]: Finished difference Result 103 states and 132 transitions. [2023-04-02 22:58:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:58:51,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2023-04-02 22:58:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:58:51,581 INFO L225 Difference]: With dead ends: 103 [2023-04-02 22:58:51,581 INFO L226 Difference]: Without dead ends: 66 [2023-04-02 22:58:51,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 22:58:51,582 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:58:51,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 110 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:58:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-02 22:58:51,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-04-02 22:58:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 22:58:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2023-04-02 22:58:51,592 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 36 [2023-04-02 22:58:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:58:51,592 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2023-04-02 22:58:51,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-02 22:58:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2023-04-02 22:58:51,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 22:58:51,593 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:58:51,593 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-04-02 22:58:51,599 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 22:58:51,799 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 22:58:51,799 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:58:51,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:58:51,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1928120631, now seen corresponding path program 1 times [2023-04-02 22:58:51,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:58:51,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352036833] [2023-04-02 22:58:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:51,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:58:51,808 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:58:51,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471765718] [2023-04-02 22:58:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:51,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:58:51,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:51,810 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 22:58:51,812 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 22:58:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:58:51,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 22:58:51,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:58:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:58:51,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:58:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 22:58:51,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:58:51,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352036833] [2023-04-02 22:58:51,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:58:51,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471765718] [2023-04-02 22:58:51,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471765718] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:58:51,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1514842246] [2023-04-02 22:58:51,945 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-02 22:58:51,945 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:58:51,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:58:51,945 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:58:51,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:58:51,960 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:58:52,701 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:58:52,703 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:58:52,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:58:52,706 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:58:52,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1911#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:58:52,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:58:52,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:58:52,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-02 22:58:52,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350460043] [2023-04-02 22:58:52,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:58:52,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 22:58:52,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:58:52,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 22:58:52,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2023-04-02 22:58:52,980 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-02 22:58:53,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:58:53,094 INFO L93 Difference]: Finished difference Result 190 states and 244 transitions. [2023-04-02 22:58:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 22:58:53,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 38 [2023-04-02 22:58:53,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:58:53,096 INFO L225 Difference]: With dead ends: 190 [2023-04-02 22:58:53,096 INFO L226 Difference]: Without dead ends: 153 [2023-04-02 22:58:53,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2023-04-02 22:58:53,098 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 64 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:58:53,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 132 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:58:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-04-02 22:58:53,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2023-04-02 22:58:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 99 states have (on average 1.2525252525252526) internal successors, (124), 101 states have internal predecessors, (124), 25 states have call successors, (25), 14 states have call predecessors, (25), 12 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-02 22:58:53,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 172 transitions. [2023-04-02 22:58:53,130 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 172 transitions. Word has length 38 [2023-04-02 22:58:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:58:53,131 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 172 transitions. [2023-04-02 22:58:53,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-02 22:58:53,131 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 172 transitions. [2023-04-02 22:58:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 22:58:53,133 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:58:53,133 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1] [2023-04-02 22:58:53,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 22:58:53,342 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 22:58:53,342 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:58:53,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:58:53,342 INFO L85 PathProgramCache]: Analyzing trace with hash 315522590, now seen corresponding path program 1 times [2023-04-02 22:58:53,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:58:53,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522617661] [2023-04-02 22:58:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:53,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:58:53,358 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:58:53,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849928382] [2023-04-02 22:58:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:53,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:58:53,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:53,361 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 22:58:53,363 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 22:58:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:58:53,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 22:58:53,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:58:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 22:58:53,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:58:53,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:58:53,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522617661] [2023-04-02 22:58:53,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:58:53,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849928382] [2023-04-02 22:58:53,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849928382] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:58:53,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:58:53,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 22:58:53,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578257977] [2023-04-02 22:58:53,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:58:53,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 22:58:53,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:58:53,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 22:58:53,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:58:53,438 INFO L87 Difference]: Start difference. First operand 137 states and 172 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 22:58:53,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:58:53,488 INFO L93 Difference]: Finished difference Result 232 states and 307 transitions. [2023-04-02 22:58:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 22:58:53,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2023-04-02 22:58:53,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:58:53,491 INFO L225 Difference]: With dead ends: 232 [2023-04-02 22:58:53,491 INFO L226 Difference]: Without dead ends: 177 [2023-04-02 22:58:53,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:58:53,494 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 16 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:58:53,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 104 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:58:53,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-04-02 22:58:53,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 159. [2023-04-02 22:58:53,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 116 states have (on average 1.2586206896551724) internal successors, (146), 118 states have internal predecessors, (146), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-02 22:58:53,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 204 transitions. [2023-04-02 22:58:53,521 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 204 transitions. Word has length 42 [2023-04-02 22:58:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:58:53,522 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 204 transitions. [2023-04-02 22:58:53,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-02 22:58:53,522 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 204 transitions. [2023-04-02 22:58:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 22:58:53,526 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:58:53,526 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:58:53,530 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 22:58:53,730 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 22:58:53,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:58:53,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:58:53,731 INFO L85 PathProgramCache]: Analyzing trace with hash 114852067, now seen corresponding path program 1 times [2023-04-02 22:58:53,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:58:53,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237628967] [2023-04-02 22:58:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:53,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:58:53,736 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:58:53,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890105354] [2023-04-02 22:58:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:53,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:58:53,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:53,737 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 22:58:53,739 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 22:58:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:58:53,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 22:58:53,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:58:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:58:53,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:58:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 22:58:53,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:58:53,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237628967] [2023-04-02 22:58:53,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:58:53,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890105354] [2023-04-02 22:58:53,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890105354] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:58:53,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [184215439] [2023-04-02 22:58:53,904 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 22:58:53,904 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:58:53,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:58:53,905 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:58:53,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:58:53,919 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:58:54,518 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 22:58:54,526 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:58:54,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:58:54,530 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:58:55,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3378#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:58:55,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:58:55,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:58:55,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-04-02 22:58:55,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403536273] [2023-04-02 22:58:55,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:58:55,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 22:58:55,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:58:55,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 22:58:55,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 22:58:55,438 INFO L87 Difference]: Start difference. First operand 159 states and 204 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-02 22:58:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:58:55,615 INFO L93 Difference]: Finished difference Result 348 states and 461 transitions. [2023-04-02 22:58:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 22:58:55,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 44 [2023-04-02 22:58:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:58:55,617 INFO L225 Difference]: With dead ends: 348 [2023-04-02 22:58:55,617 INFO L226 Difference]: Without dead ends: 263 [2023-04-02 22:58:55,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 22:58:55,620 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 97 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:58:55,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 204 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:58:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-04-02 22:58:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 241. [2023-04-02 22:58:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 178 states have (on average 1.252808988764045) internal successors, (223), 180 states have internal predecessors, (223), 46 states have call successors, (46), 18 states have call predecessors, (46), 16 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2023-04-02 22:58:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 313 transitions. [2023-04-02 22:58:55,650 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 313 transitions. Word has length 44 [2023-04-02 22:58:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:58:55,650 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 313 transitions. [2023-04-02 22:58:55,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-02 22:58:55,651 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 313 transitions. [2023-04-02 22:58:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 22:58:55,652 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:58:55,652 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2023-04-02 22:58:55,663 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 22:58:55,857 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 22:58:55,857 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:58:55,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:58:55,857 INFO L85 PathProgramCache]: Analyzing trace with hash -879968241, now seen corresponding path program 1 times [2023-04-02 22:58:55,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:58:55,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609489574] [2023-04-02 22:58:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:55,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:58:55,873 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:58:55,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833813281] [2023-04-02 22:58:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:55,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:58:55,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:55,874 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 22:58:55,881 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 22:58:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:58:55,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 22:58:55,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:58:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:58:55,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:58:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 22:58:56,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:58:56,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609489574] [2023-04-02 22:58:56,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:58:56,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833813281] [2023-04-02 22:58:56,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833813281] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:58:56,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798971813] [2023-04-02 22:58:56,060 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 22:58:56,060 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:58:56,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:58:56,060 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:58:56,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:58:56,072 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:58:56,748 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-02 22:58:56,750 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:58:56,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:58:56,754 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:58:57,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4577#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:58:57,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:58:57,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:58:57,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 22:58:57,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083186625] [2023-04-02 22:58:57,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:58:57,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 22:58:57,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:58:57,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 22:58:57,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 22:58:57,103 INFO L87 Difference]: Start difference. First operand 241 states and 313 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2023-04-02 22:58:57,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:58:57,302 INFO L93 Difference]: Finished difference Result 343 states and 456 transitions. [2023-04-02 22:58:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 22:58:57,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 50 [2023-04-02 22:58:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:58:57,306 INFO L225 Difference]: With dead ends: 343 [2023-04-02 22:58:57,306 INFO L226 Difference]: Without dead ends: 338 [2023-04-02 22:58:57,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 22:58:57,307 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:58:57,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 228 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:58:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-04-02 22:58:57,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 324. [2023-04-02 22:58:57,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 239 states have (on average 1.2343096234309623) internal successors, (295), 246 states have internal predecessors, (295), 64 states have call successors, (64), 22 states have call predecessors, (64), 20 states have return successors, (62), 55 states have call predecessors, (62), 62 states have call successors, (62) [2023-04-02 22:58:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 421 transitions. [2023-04-02 22:58:57,343 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 421 transitions. Word has length 50 [2023-04-02 22:58:57,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:58:57,344 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 421 transitions. [2023-04-02 22:58:57,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2023-04-02 22:58:57,344 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 421 transitions. [2023-04-02 22:58:57,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-02 22:58:57,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:58:57,346 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 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] [2023-04-02 22:58:57,354 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 22:58:57,550 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 22:58:57,551 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:58:57,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:58:57,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1774235343, now seen corresponding path program 1 times [2023-04-02 22:58:57,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:58:57,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941220104] [2023-04-02 22:58:57,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:57,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:58:57,557 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:58:57,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480070251] [2023-04-02 22:58:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:57,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:58:57,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:57,561 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 22:58:57,563 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 22:58:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:58:57,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 22:58:57,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:58:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-04-02 22:58:57,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:58:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2023-04-02 22:58:57,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:58:57,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941220104] [2023-04-02 22:58:57,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:58:57,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480070251] [2023-04-02 22:58:57,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480070251] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:58:57,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717104881] [2023-04-02 22:58:57,687 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 22:58:57,688 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:58:57,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:58:57,688 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:58:57,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:58:57,709 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:58:58,512 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-02 22:58:58,514 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:58:58,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:58:58,517 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:58:58,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6100#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:58:58,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:58:58,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:58:58,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2023-04-02 22:58:58,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887886611] [2023-04-02 22:58:58,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:58:58,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 22:58:58,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:58:58,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 22:58:58,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-04-02 22:58:58,741 INFO L87 Difference]: Start difference. First operand 324 states and 421 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-02 22:58:58,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:58:58,835 INFO L93 Difference]: Finished difference Result 580 states and 784 transitions. [2023-04-02 22:58:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 22:58:58,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 86 [2023-04-02 22:58:58,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:58:58,837 INFO L225 Difference]: With dead ends: 580 [2023-04-02 22:58:58,837 INFO L226 Difference]: Without dead ends: 388 [2023-04-02 22:58:58,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 227 SyntacticMatches, 12 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-04-02 22:58:58,838 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 18 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:58:58,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 113 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:58:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2023-04-02 22:58:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 385. [2023-04-02 22:58:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 288 states have (on average 1.2430555555555556) internal successors, (358), 294 states have internal predecessors, (358), 76 states have call successors, (76), 22 states have call predecessors, (76), 20 states have return successors, (74), 68 states have call predecessors, (74), 74 states have call successors, (74) [2023-04-02 22:58:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 508 transitions. [2023-04-02 22:58:58,875 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 508 transitions. Word has length 86 [2023-04-02 22:58:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:58:58,876 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 508 transitions. [2023-04-02 22:58:58,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-02 22:58:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 508 transitions. [2023-04-02 22:58:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-02 22:58:58,877 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:58:58,877 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:58:58,881 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 22:58:59,081 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 22:58:59,081 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:58:59,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:58:59,082 INFO L85 PathProgramCache]: Analyzing trace with hash -366350429, now seen corresponding path program 2 times [2023-04-02 22:58:59,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:58:59,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146488639] [2023-04-02 22:58:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:59,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:58:59,088 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:58:59,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298790401] [2023-04-02 22:58:59,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:58:59,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:58:59,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:59,089 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 22:58:59,091 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 22:58:59,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 22:58:59,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:58:59,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 22:58:59,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:58:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-04-02 22:58:59,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:58:59,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:58:59,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146488639] [2023-04-02 22:58:59,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:58:59,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298790401] [2023-04-02 22:58:59,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298790401] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:58:59,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:58:59,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:58:59,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597128658] [2023-04-02 22:58:59,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:58:59,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:58:59,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:58:59,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:58:59,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:58:59,181 INFO L87 Difference]: Start difference. First operand 385 states and 508 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 22:58:59,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:58:59,256 INFO L93 Difference]: Finished difference Result 647 states and 873 transitions. [2023-04-02 22:58:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:58:59,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 86 [2023-04-02 22:58:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:58:59,259 INFO L225 Difference]: With dead ends: 647 [2023-04-02 22:58:59,259 INFO L226 Difference]: Without dead ends: 486 [2023-04-02 22:58:59,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 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 22:58:59,260 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:58:59,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 149 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:58:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-04-02 22:58:59,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 433. [2023-04-02 22:58:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 328 states have (on average 1.2317073170731707) internal successors, (404), 334 states have internal predecessors, (404), 82 states have call successors, (82), 24 states have call predecessors, (82), 22 states have return successors, (80), 74 states have call predecessors, (80), 80 states have call successors, (80) [2023-04-02 22:58:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 566 transitions. [2023-04-02 22:58:59,301 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 566 transitions. Word has length 86 [2023-04-02 22:58:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:58:59,301 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 566 transitions. [2023-04-02 22:58:59,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 22:58:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 566 transitions. [2023-04-02 22:58:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-02 22:58:59,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:58:59,303 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 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] [2023-04-02 22:58:59,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 22:58:59,506 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 22:58:59,506 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:58:59,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:58:59,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1815404523, now seen corresponding path program 3 times [2023-04-02 22:58:59,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:58:59,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207923304] [2023-04-02 22:58:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:58:59,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:58:59,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:58:59,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108836494] [2023-04-02 22:58:59,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:58:59,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:58:59,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:58:59,513 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 22:58:59,514 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 22:58:59,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:58:59,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:58:59,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-02 22:58:59,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:58:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 24 proven. 152 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:58:59,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:58:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-02 22:58:59,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:58:59,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207923304] [2023-04-02 22:58:59,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:58:59,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108836494] [2023-04-02 22:58:59,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108836494] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:58:59,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1358021469] [2023-04-02 22:58:59,892 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 22:58:59,892 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:58:59,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:58:59,893 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:58:59,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:58:59,904 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:59:00,711 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-02 22:59:00,713 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:59:00,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:59:00,716 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:59:01,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9916#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:59:01,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:59:01,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:59:01,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-04-02 22:59:01,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606238611] [2023-04-02 22:59:01,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:59:01,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 22:59:01,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:01,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 22:59:01,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 22:59:01,029 INFO L87 Difference]: Start difference. First operand 433 states and 566 transitions. Second operand has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 20 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 18 states have call predecessors, (22), 19 states have call successors, (22) [2023-04-02 22:59:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:01,616 INFO L93 Difference]: Finished difference Result 1298 states and 1820 transitions. [2023-04-02 22:59:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-02 22:59:01,617 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 20 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 18 states have call predecessors, (22), 19 states have call successors, (22) Word has length 86 [2023-04-02 22:59:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:01,623 INFO L225 Difference]: With dead ends: 1298 [2023-04-02 22:59:01,623 INFO L226 Difference]: Without dead ends: 1233 [2023-04-02 22:59:01,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 208 SyntacticMatches, 13 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=700, Invalid=2162, Unknown=0, NotChecked=0, Total=2862 [2023-04-02 22:59:01,625 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 302 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:01,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 304 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 22:59:01,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2023-04-02 22:59:01,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1168. [2023-04-02 22:59:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 885 states have (on average 1.2485875706214689) internal successors, (1105), 896 states have internal predecessors, (1105), 244 states have call successors, (244), 40 states have call predecessors, (244), 38 states have return successors, (242), 231 states have call predecessors, (242), 242 states have call successors, (242) [2023-04-02 22:59:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1591 transitions. [2023-04-02 22:59:01,759 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1591 transitions. Word has length 86 [2023-04-02 22:59:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:01,760 INFO L495 AbstractCegarLoop]: Abstraction has 1168 states and 1591 transitions. [2023-04-02 22:59:01,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 20 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 18 states have call predecessors, (22), 19 states have call successors, (22) [2023-04-02 22:59:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1591 transitions. [2023-04-02 22:59:01,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-02 22:59:01,761 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:01,761 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:01,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-04-02 22:59:01,965 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 22:59:01,965 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:01,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1060783807, now seen corresponding path program 1 times [2023-04-02 22:59:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:01,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13935999] [2023-04-02 22:59:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:01,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:01,972 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:01,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868164423] [2023-04-02 22:59:01,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:01,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:01,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:01,973 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 22:59:01,975 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 22:59:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:59:02,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 22:59:02,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:59:02,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:59:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-04-02 22:59:02,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:02,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13935999] [2023-04-02 22:59:02,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:02,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868164423] [2023-04-02 22:59:02,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868164423] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:59:02,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [971719095] [2023-04-02 22:59:02,306 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 22:59:02,306 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:59:02,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:59:02,306 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:59:02,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:59:02,317 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:59:03,501 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:59:03,503 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:59:03,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:59:03,506 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:59:05,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14174#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:59:05,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:59:05,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:59:05,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-04-02 22:59:05,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303091152] [2023-04-02 22:59:05,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:59:05,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 22:59:05,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:05,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 22:59:05,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 22:59:05,069 INFO L87 Difference]: Start difference. First operand 1168 states and 1591 transitions. Second operand has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 24 states have internal predecessors, (101), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2023-04-02 22:59:05,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:05,688 INFO L93 Difference]: Finished difference Result 1774 states and 2392 transitions. [2023-04-02 22:59:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-02 22:59:05,688 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 24 states have internal predecessors, (101), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) Word has length 92 [2023-04-02 22:59:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:05,691 INFO L225 Difference]: With dead ends: 1774 [2023-04-02 22:59:05,691 INFO L226 Difference]: Without dead ends: 912 [2023-04-02 22:59:05,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 221 SyntacticMatches, 13 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=762, Invalid=2778, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 22:59:05,693 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 350 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:05,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 307 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 22:59:05,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2023-04-02 22:59:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 858. [2023-04-02 22:59:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 643 states have (on average 1.1912908242612752) internal successors, (766), 646 states have internal predecessors, (766), 172 states have call successors, (172), 44 states have call predecessors, (172), 42 states have return successors, (170), 167 states have call predecessors, (170), 170 states have call successors, (170) [2023-04-02 22:59:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1108 transitions. [2023-04-02 22:59:05,771 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1108 transitions. Word has length 92 [2023-04-02 22:59:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:05,771 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 1108 transitions. [2023-04-02 22:59:05,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.208333333333333) internal successors, (101), 24 states have internal predecessors, (101), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2023-04-02 22:59:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1108 transitions. [2023-04-02 22:59:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-02 22:59:05,772 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:05,773 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:05,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-04-02 22:59:05,977 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 22:59:05,978 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:05,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:05,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1765390829, now seen corresponding path program 1 times [2023-04-02 22:59:05,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:05,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765587647] [2023-04-02 22:59:05,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:05,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:05,984 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:05,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901894992] [2023-04-02 22:59:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:05,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:05,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:05,985 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 22:59:05,987 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 22:59:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:59:06,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 22:59:06,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:59:06,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:59:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-04-02 22:59:06,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:06,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765587647] [2023-04-02 22:59:06,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:06,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901894992] [2023-04-02 22:59:06,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901894992] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:59:06,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [383621746] [2023-04-02 22:59:06,417 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 22:59:06,417 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:59:06,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:59:06,417 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:59:06,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:59:06,431 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:59:07,504 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:59:07,505 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:59:07,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:59:07,508 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:59:09,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18694#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:59:09,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:59:09,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:59:09,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-02 22:59:09,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527158072] [2023-04-02 22:59:09,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:59:09,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 22:59:09,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:09,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 22:59:09,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1517, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 22:59:09,045 INFO L87 Difference]: Start difference. First operand 858 states and 1108 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2023-04-02 22:59:09,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:09,799 INFO L93 Difference]: Finished difference Result 983 states and 1281 transitions. [2023-04-02 22:59:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-04-02 22:59:09,800 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) Word has length 98 [2023-04-02 22:59:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:09,803 INFO L225 Difference]: With dead ends: 983 [2023-04-02 22:59:09,803 INFO L226 Difference]: Without dead ends: 978 [2023-04-02 22:59:09,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 242 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=852, Invalid=3054, Unknown=0, NotChecked=0, Total=3906 [2023-04-02 22:59:09,806 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 344 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:09,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 348 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 22:59:09,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2023-04-02 22:59:09,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 961. [2023-04-02 22:59:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 724 states have (on average 1.171270718232044) internal successors, (848), 730 states have internal predecessors, (848), 190 states have call successors, (190), 48 states have call predecessors, (190), 46 states have return successors, (188), 182 states have call predecessors, (188), 188 states have call successors, (188) [2023-04-02 22:59:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1226 transitions. [2023-04-02 22:59:09,896 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1226 transitions. Word has length 98 [2023-04-02 22:59:09,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:09,897 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 1226 transitions. [2023-04-02 22:59:09,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2023-04-02 22:59:09,897 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1226 transitions. [2023-04-02 22:59:09,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-02 22:59:09,902 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:09,903 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:09,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-04-02 22:59:10,107 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 22:59:10,107 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:10,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:10,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1682891277, now seen corresponding path program 4 times [2023-04-02 22:59:10,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:10,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474266930] [2023-04-02 22:59:10,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:10,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:10,115 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:10,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505105609] [2023-04-02 22:59:10,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:59:10,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:10,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:10,116 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 22:59:10,118 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 22:59:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:59:10,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 22:59:10,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2023-04-02 22:59:10,200 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:59:10,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:10,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474266930] [2023-04-02 22:59:10,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:10,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505105609] [2023-04-02 22:59:10,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505105609] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:59:10,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:59:10,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 22:59:10,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171845657] [2023-04-02 22:59:10,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:59:10,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 22:59:10,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:10,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 22:59:10,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:59:10,202 INFO L87 Difference]: Start difference. First operand 961 states and 1226 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-04-02 22:59:10,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:10,325 INFO L93 Difference]: Finished difference Result 1546 states and 2002 transitions. [2023-04-02 22:59:10,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:59:10,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 182 [2023-04-02 22:59:10,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:10,328 INFO L225 Difference]: With dead ends: 1546 [2023-04-02 22:59:10,328 INFO L226 Difference]: Without dead ends: 1022 [2023-04-02 22:59:10,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:59:10,329 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:10,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 72 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:59:10,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2023-04-02 22:59:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 953. [2023-04-02 22:59:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 719 states have (on average 1.1655076495132128) internal successors, (838), 727 states have internal predecessors, (838), 187 states have call successors, (187), 48 states have call predecessors, (187), 46 states have return successors, (185), 177 states have call predecessors, (185), 185 states have call successors, (185) [2023-04-02 22:59:10,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1210 transitions. [2023-04-02 22:59:10,417 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1210 transitions. Word has length 182 [2023-04-02 22:59:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:10,417 INFO L495 AbstractCegarLoop]: Abstraction has 953 states and 1210 transitions. [2023-04-02 22:59:10,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-04-02 22:59:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1210 transitions. [2023-04-02 22:59:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-02 22:59:10,419 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:10,419 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:10,425 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 22:59:10,624 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 22:59:10,624 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:10,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash 139360399, now seen corresponding path program 5 times [2023-04-02 22:59:10,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:10,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840833028] [2023-04-02 22:59:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:10,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:10,632 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:10,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768401050] [2023-04-02 22:59:10,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:59:10,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:10,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:10,633 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 22:59:10,635 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 22:59:10,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 22:59:10,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:59:10,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 22:59:10,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2023-04-02 22:59:10,707 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:59:10,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:10,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840833028] [2023-04-02 22:59:10,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:10,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768401050] [2023-04-02 22:59:10,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768401050] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:59:10,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:59:10,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 22:59:10,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953983567] [2023-04-02 22:59:10,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:59:10,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 22:59:10,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:10,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 22:59:10,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:59:10,709 INFO L87 Difference]: Start difference. First operand 953 states and 1210 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 22:59:10,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:10,802 INFO L93 Difference]: Finished difference Result 1006 states and 1268 transitions. [2023-04-02 22:59:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 22:59:10,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 182 [2023-04-02 22:59:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:10,805 INFO L225 Difference]: With dead ends: 1006 [2023-04-02 22:59:10,805 INFO L226 Difference]: Without dead ends: 921 [2023-04-02 22:59:10,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:59:10,806 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:10,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 84 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:59:10,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-02 22:59:10,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 900. [2023-04-02 22:59:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 679 states have (on average 1.1575846833578793) internal successors, (786), 686 states have internal predecessors, (786), 174 states have call successors, (174), 48 states have call predecessors, (174), 46 states have return successors, (172), 165 states have call predecessors, (172), 172 states have call successors, (172) [2023-04-02 22:59:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1132 transitions. [2023-04-02 22:59:10,888 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1132 transitions. Word has length 182 [2023-04-02 22:59:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:10,889 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 1132 transitions. [2023-04-02 22:59:10,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 22:59:10,889 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1132 transitions. [2023-04-02 22:59:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-02 22:59:10,892 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:10,892 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:10,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-02 22:59:11,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 22:59:11,097 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:11,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:11,097 INFO L85 PathProgramCache]: Analyzing trace with hash -521886255, now seen corresponding path program 6 times [2023-04-02 22:59:11,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:11,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247442668] [2023-04-02 22:59:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:11,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:11,104 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:11,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404606086] [2023-04-02 22:59:11,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:59:11,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:11,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:11,105 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:59:11,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-02 22:59:11,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:59:11,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:59:11,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 22:59:11,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 280 proven. 184 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2023-04-02 22:59:11,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:59:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 140 proven. 184 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2023-04-02 22:59:11,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:11,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247442668] [2023-04-02 22:59:11,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:11,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404606086] [2023-04-02 22:59:11,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404606086] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:59:11,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1572581679] [2023-04-02 22:59:11,408 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 22:59:11,408 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:59:11,408 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:59:11,408 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:59:11,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:59:11,419 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:59:12,189 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-02 22:59:12,191 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:59:12,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:59:12,195 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:59:12,675 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30214#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:59:12,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:59:12,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:59:12,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2023-04-02 22:59:12,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103358424] [2023-04-02 22:59:12,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:59:12,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 22:59:12,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:12,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 22:59:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2023-04-02 22:59:12,676 INFO L87 Difference]: Start difference. First operand 900 states and 1132 transitions. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2023-04-02 22:59:13,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:13,437 INFO L93 Difference]: Finished difference Result 2015 states and 2671 transitions. [2023-04-02 22:59:13,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 22:59:13,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 182 [2023-04-02 22:59:13,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:13,443 INFO L225 Difference]: With dead ends: 2015 [2023-04-02 22:59:13,443 INFO L226 Difference]: Without dead ends: 1792 [2023-04-02 22:59:13,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 485 SyntacticMatches, 36 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2023-04-02 22:59:13,445 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 107 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:13,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 889 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 22:59:13,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2023-04-02 22:59:13,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1477. [2023-04-02 22:59:13,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1115 states have (on average 1.180269058295964) internal successors, (1316), 1131 states have internal predecessors, (1316), 315 states have call successors, (315), 48 states have call predecessors, (315), 46 states have return successors, (313), 297 states have call predecessors, (313), 313 states have call successors, (313) [2023-04-02 22:59:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 1944 transitions. [2023-04-02 22:59:13,617 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 1944 transitions. Word has length 182 [2023-04-02 22:59:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:13,618 INFO L495 AbstractCegarLoop]: Abstraction has 1477 states and 1944 transitions. [2023-04-02 22:59:13,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2023-04-02 22:59:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 1944 transitions. [2023-04-02 22:59:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-02 22:59:13,621 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:13,621 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:13,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-04-02 22:59:13,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 22:59:13,826 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:13,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:13,827 INFO L85 PathProgramCache]: Analyzing trace with hash -952690145, now seen corresponding path program 7 times [2023-04-02 22:59:13,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:13,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686920329] [2023-04-02 22:59:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:13,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:13,834 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:13,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227795264] [2023-04-02 22:59:13,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:59:13,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:13,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:13,835 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:59:13,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-04-02 22:59:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:59:13,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 22:59:13,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2023-04-02 22:59:14,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:59:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2023-04-02 22:59:14,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:14,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686920329] [2023-04-02 22:59:14,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:14,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227795264] [2023-04-02 22:59:14,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227795264] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:59:14,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1606398025] [2023-04-02 22:59:14,161 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 22:59:14,161 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:59:14,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:59:14,161 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:59:14,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:59:14,178 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:59:14,967 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-02 22:59:14,970 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:59:14,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:59:14,973 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:59:15,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36538#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:59:15,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:59:15,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:59:15,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 22:59:15,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200616663] [2023-04-02 22:59:15,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:59:15,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 22:59:15,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:15,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 22:59:15,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2023-04-02 22:59:15,530 INFO L87 Difference]: Start difference. First operand 1477 states and 1944 transitions. Second operand has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2023-04-02 22:59:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:16,678 INFO L93 Difference]: Finished difference Result 3127 states and 4235 transitions. [2023-04-02 22:59:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-02 22:59:16,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) Word has length 182 [2023-04-02 22:59:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:16,685 INFO L225 Difference]: With dead ends: 3127 [2023-04-02 22:59:16,685 INFO L226 Difference]: Without dead ends: 2804 [2023-04-02 22:59:16,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 512 SyntacticMatches, 30 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=436, Invalid=2534, Unknown=0, NotChecked=0, Total=2970 [2023-04-02 22:59:16,687 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 205 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:16,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 751 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 22:59:16,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2023-04-02 22:59:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2145. [2023-04-02 22:59:16,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 1616 states have (on average 1.1683168316831682) internal successors, (1888), 1644 states have internal predecessors, (1888), 482 states have call successors, (482), 48 states have call predecessors, (482), 46 states have return successors, (480), 452 states have call predecessors, (480), 480 states have call successors, (480) [2023-04-02 22:59:16,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 2850 transitions. [2023-04-02 22:59:16,953 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 2850 transitions. Word has length 182 [2023-04-02 22:59:16,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:16,953 INFO L495 AbstractCegarLoop]: Abstraction has 2145 states and 2850 transitions. [2023-04-02 22:59:16,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2023-04-02 22:59:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 2850 transitions. [2023-04-02 22:59:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-02 22:59:16,958 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:16,959 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:16,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-04-02 22:59:17,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:17,164 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:17,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash 955150801, now seen corresponding path program 8 times [2023-04-02 22:59:17,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:17,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98947193] [2023-04-02 22:59:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:17,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:17,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:17,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509687651] [2023-04-02 22:59:17,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:59:17,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:17,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:17,173 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:59:17,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-04-02 22:59:17,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-04-02 22:59:17,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:59:17,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 22:59:17,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2023-04-02 22:59:18,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:59:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2023-04-02 22:59:18,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:18,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98947193] [2023-04-02 22:59:18,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:18,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509687651] [2023-04-02 22:59:18,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509687651] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:59:18,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [779854921] [2023-04-02 22:59:18,226 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 22:59:18,226 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:59:18,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:59:18,226 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:59:18,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:59:18,237 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:59:19,003 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-02 22:59:19,005 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:59:19,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:59:19,008 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:59:19,605 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45593#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:59:19,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:59:19,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:59:19,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2023-04-02 22:59:19,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813836827] [2023-04-02 22:59:19,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:59:19,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 22:59:19,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:19,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 22:59:19,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 22:59:19,607 INFO L87 Difference]: Start difference. First operand 2145 states and 2850 transitions. Second operand has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2023-04-02 22:59:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:21,523 INFO L93 Difference]: Finished difference Result 3765 states and 5112 transitions. [2023-04-02 22:59:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-02 22:59:21,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) Word has length 182 [2023-04-02 22:59:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:21,532 INFO L225 Difference]: With dead ends: 3765 [2023-04-02 22:59:21,533 INFO L226 Difference]: Without dead ends: 3470 [2023-04-02 22:59:21,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 480 SyntacticMatches, 33 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=558, Invalid=4554, Unknown=0, NotChecked=0, Total=5112 [2023-04-02 22:59:21,535 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 305 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:21,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 1601 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1567 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 22:59:21,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3470 states. [2023-04-02 22:59:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3470 to 2681. [2023-04-02 22:59:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2681 states, 2022 states have (on average 1.1800197823936696) internal successors, (2386), 2064 states have internal predecessors, (2386), 612 states have call successors, (612), 48 states have call predecessors, (612), 46 states have return successors, (610), 568 states have call predecessors, (610), 610 states have call successors, (610) [2023-04-02 22:59:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2681 states to 2681 states and 3608 transitions. [2023-04-02 22:59:21,917 INFO L78 Accepts]: Start accepts. Automaton has 2681 states and 3608 transitions. Word has length 182 [2023-04-02 22:59:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:21,918 INFO L495 AbstractCegarLoop]: Abstraction has 2681 states and 3608 transitions. [2023-04-02 22:59:21,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2023-04-02 22:59:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2681 states and 3608 transitions. [2023-04-02 22:59:21,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-02 22:59:21,924 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:21,924 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:21,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-04-02 22:59:22,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:22,130 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:22,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:22,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1837383121, now seen corresponding path program 9 times [2023-04-02 22:59:22,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:22,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784091140] [2023-04-02 22:59:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:22,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:22,137 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:22,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403855527] [2023-04-02 22:59:22,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:59:22,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:22,138 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:59:22,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-04-02 22:59:22,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:59:22,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:59:22,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-02 22:59:22,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:59:22,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:59:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2023-04-02 22:59:23,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784091140] [2023-04-02 22:59:23,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403855527] [2023-04-02 22:59:23,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403855527] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:59:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1242122936] [2023-04-02 22:59:23,122 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 22:59:23,122 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:59:23,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:59:23,123 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:59:23,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:59:23,137 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:59:23,911 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-02 22:59:23,913 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:59:23,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:59:23,916 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:59:24,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56460#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:59:24,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:59:24,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:59:24,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2023-04-02 22:59:24,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825461770] [2023-04-02 22:59:24,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:59:24,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-02 22:59:24,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:24,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-02 22:59:24,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1296, Invalid=2486, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 22:59:24,617 INFO L87 Difference]: Start difference. First operand 2681 states and 3608 transitions. Second operand has 46 states, 46 states have (on average 4.391304347826087) internal successors, (202), 46 states have internal predecessors, (202), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) [2023-04-02 22:59:27,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:27,474 INFO L93 Difference]: Finished difference Result 10497 states and 15657 transitions. [2023-04-02 22:59:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-04-02 22:59:27,474 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.391304347826087) internal successors, (202), 46 states have internal predecessors, (202), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) Word has length 182 [2023-04-02 22:59:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:27,505 INFO L225 Difference]: With dead ends: 10497 [2023-04-02 22:59:27,506 INFO L226 Difference]: Without dead ends: 10362 [2023-04-02 22:59:27,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 454 SyntacticMatches, 31 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4239 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3076, Invalid=7226, Unknown=0, NotChecked=0, Total=10302 [2023-04-02 22:59:27,512 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 936 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:27,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 615 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 22:59:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10362 states. [2023-04-02 22:59:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10362 to 10104. [2023-04-02 22:59:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10104 states, 7603 states have (on average 1.2573983953702486) internal successors, (9560), 7668 states have internal predecessors, (9560), 2414 states have call successors, (2414), 88 states have call predecessors, (2414), 86 states have return successors, (2412), 2347 states have call predecessors, (2412), 2412 states have call successors, (2412) [2023-04-02 22:59:29,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10104 states to 10104 states and 14386 transitions. [2023-04-02 22:59:29,130 INFO L78 Accepts]: Start accepts. Automaton has 10104 states and 14386 transitions. Word has length 182 [2023-04-02 22:59:29,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:29,130 INFO L495 AbstractCegarLoop]: Abstraction has 10104 states and 14386 transitions. [2023-04-02 22:59:29,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.391304347826087) internal successors, (202), 46 states have internal predecessors, (202), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) [2023-04-02 22:59:29,130 INFO L276 IsEmpty]: Start isEmpty. Operand 10104 states and 14386 transitions. [2023-04-02 22:59:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-04-02 22:59:29,138 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:29,138 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:29,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-04-02 22:59:29,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:29,343 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:29,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:29,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1903939069, now seen corresponding path program 2 times [2023-04-02 22:59:29,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:29,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458430787] [2023-04-02 22:59:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:29,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:29,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:29,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575892448] [2023-04-02 22:59:29,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:59:29,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:29,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:29,354 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:59:29,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-04-02 22:59:30,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-04-02 22:59:30,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:59:30,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-02 22:59:30,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 42 proven. 1150 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:59:30,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:59:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 42 proven. 310 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2023-04-02 22:59:31,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:31,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458430787] [2023-04-02 22:59:31,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:31,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575892448] [2023-04-02 22:59:31,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575892448] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:59:31,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [17752931] [2023-04-02 22:59:31,248 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 22:59:31,248 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:59:31,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:59:31,248 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:59:31,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:59:31,267 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:59:32,454 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 22:59:32,456 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:59:32,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:59:32,459 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:59:35,047 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '88516#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:59:35,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:59:35,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:59:35,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-02 22:59:35,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247252487] [2023-04-02 22:59:35,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:59:35,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-02 22:59:35,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:35,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-02 22:59:35,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1467, Invalid=3225, Unknown=0, NotChecked=0, Total=4692 [2023-04-02 22:59:35,051 INFO L87 Difference]: Start difference. First operand 10104 states and 14386 transitions. Second operand has 50 states, 50 states have (on average 4.22) internal successors, (211), 50 states have internal predecessors, (211), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) [2023-04-02 22:59:38,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:38,365 INFO L93 Difference]: Finished difference Result 11901 states and 17054 transitions. [2023-04-02 22:59:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-04-02 22:59:38,366 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.22) internal successors, (211), 50 states have internal predecessors, (211), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) Word has length 188 [2023-04-02 22:59:38,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:38,388 INFO L225 Difference]: With dead ends: 11901 [2023-04-02 22:59:38,388 INFO L226 Difference]: Without dead ends: 11800 [2023-04-02 22:59:38,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 465 SyntacticMatches, 31 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5639 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3380, Invalid=8830, Unknown=0, NotChecked=0, Total=12210 [2023-04-02 22:59:38,393 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 875 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:38,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [875 Valid, 646 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 22:59:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11800 states. [2023-04-02 22:59:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11800 to 10202. [2023-04-02 22:59:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 7692 states have (on average 1.1804472178887155) internal successors, (9080), 7771 states have internal predecessors, (9080), 2414 states have call successors, (2414), 97 states have call predecessors, (2414), 95 states have return successors, (2412), 2333 states have call predecessors, (2412), 2412 states have call successors, (2412) [2023-04-02 22:59:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 13906 transitions. [2023-04-02 22:59:39,999 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 13906 transitions. Word has length 188 [2023-04-02 22:59:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:39,999 INFO L495 AbstractCegarLoop]: Abstraction has 10202 states and 13906 transitions. [2023-04-02 22:59:40,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.22) internal successors, (211), 50 states have internal predecessors, (211), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) [2023-04-02 22:59:40,000 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 13906 transitions. [2023-04-02 22:59:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2023-04-02 22:59:40,026 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:40,026 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 18, 17, 17, 17, 16, 13, 12, 12, 12, 12, 11, 9, 7, 7, 7, 6, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:40,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-04-02 22:59:40,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:40,232 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:40,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:40,233 INFO L85 PathProgramCache]: Analyzing trace with hash -993413961, now seen corresponding path program 10 times [2023-04-02 22:59:40,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:40,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707035758] [2023-04-02 22:59:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:40,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:40,242 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:40,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194508851] [2023-04-02 22:59:40,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:59:40,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:40,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:40,244 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:59:40,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-04-02 22:59:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:59:40,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-02 22:59:40,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3742 backedges. 1890 proven. 1026 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2023-04-02 22:59:40,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:59:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3742 backedges. 642 proven. 266 refuted. 0 times theorem prover too weak. 2834 trivial. 0 not checked. [2023-04-02 22:59:41,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:41,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707035758] [2023-04-02 22:59:41,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:41,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194508851] [2023-04-02 22:59:41,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194508851] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:59:41,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179792554] [2023-04-02 22:59:41,281 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 22:59:41,282 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:59:41,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:59:41,282 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:59:41,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:59:41,295 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:59:42,099 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-02 22:59:42,102 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:59:42,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:59:42,105 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:59:43,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '123672#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:59:43,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:59:43,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:59:43,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2023-04-02 22:59:43,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333353072] [2023-04-02 22:59:43,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:59:43,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-02 22:59:43,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:43,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-02 22:59:43,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1296, Invalid=2486, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 22:59:43,160 INFO L87 Difference]: Start difference. First operand 10202 states and 13906 transitions. Second operand has 46 states, 46 states have (on average 4.586956521739131) internal successors, (211), 46 states have internal predecessors, (211), 44 states have call successors, (52), 24 states have call predecessors, (52), 24 states have return successors, (50), 43 states have call predecessors, (50), 44 states have call successors, (50) [2023-04-02 22:59:45,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:45,598 INFO L93 Difference]: Finished difference Result 15501 states and 21396 transitions. [2023-04-02 22:59:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-04-02 22:59:45,599 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.586956521739131) internal successors, (211), 46 states have internal predecessors, (211), 44 states have call successors, (52), 24 states have call predecessors, (52), 24 states have return successors, (50), 43 states have call predecessors, (50), 44 states have call successors, (50) Word has length 326 [2023-04-02 22:59:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:45,612 INFO L225 Difference]: With dead ends: 15501 [2023-04-02 22:59:45,612 INFO L226 Difference]: Without dead ends: 7747 [2023-04-02 22:59:45,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 863 SyntacticMatches, 54 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5457 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2992, Invalid=7108, Unknown=0, NotChecked=0, Total=10100 [2023-04-02 22:59:45,628 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 758 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:45,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 534 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 22:59:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7747 states. [2023-04-02 22:59:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7747 to 7709. [2023-04-02 22:59:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7709 states, 5790 states have (on average 1.1362694300518135) internal successors, (6579), 5866 states have internal predecessors, (6579), 1823 states have call successors, (1823), 97 states have call predecessors, (1823), 95 states have return successors, (1821), 1745 states have call predecessors, (1821), 1821 states have call successors, (1821) [2023-04-02 22:59:46,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7709 states to 7709 states and 10223 transitions. [2023-04-02 22:59:46,759 INFO L78 Accepts]: Start accepts. Automaton has 7709 states and 10223 transitions. Word has length 326 [2023-04-02 22:59:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:46,759 INFO L495 AbstractCegarLoop]: Abstraction has 7709 states and 10223 transitions. [2023-04-02 22:59:46,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.586956521739131) internal successors, (211), 46 states have internal predecessors, (211), 44 states have call successors, (52), 24 states have call predecessors, (52), 24 states have return successors, (50), 43 states have call predecessors, (50), 44 states have call successors, (50) [2023-04-02 22:59:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 7709 states and 10223 transitions. [2023-04-02 22:59:46,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2023-04-02 22:59:46,777 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:46,777 INFO L195 NwaCegarLoop]: trace histogram [44, 43, 43, 20, 19, 19, 19, 17, 15, 15, 15, 11, 10, 9, 9, 9, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:46,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-04-02 22:59:46,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:46,983 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:46,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:46,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1523615255, now seen corresponding path program 11 times [2023-04-02 22:59:46,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:46,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953945862] [2023-04-02 22:59:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:46,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:46,995 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:46,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484406208] [2023-04-02 22:59:46,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:59:46,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:46,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:46,996 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:59:46,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-04-02 22:59:47,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 22:59:47,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:59:47,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 22:59:47,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5066 backedges. 387 proven. 0 refuted. 0 times theorem prover too weak. 4679 trivial. 0 not checked. [2023-04-02 22:59:47,082 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:59:47,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:47,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953945862] [2023-04-02 22:59:47,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:47,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484406208] [2023-04-02 22:59:47,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484406208] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:59:47,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:59:47,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:59:47,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86455711] [2023-04-02 22:59:47,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:59:47,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:59:47,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:47,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:59:47,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:59:47,083 INFO L87 Difference]: Start difference. First operand 7709 states and 10223 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 22:59:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:48,119 INFO L93 Difference]: Finished difference Result 8154 states and 10864 transitions. [2023-04-02 22:59:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 22:59:48,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 368 [2023-04-02 22:59:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:48,131 INFO L225 Difference]: With dead ends: 8154 [2023-04-02 22:59:48,131 INFO L226 Difference]: Without dead ends: 7318 [2023-04-02 22:59:48,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 22:59:48,134 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:48,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 123 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:59:48,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7318 states. [2023-04-02 22:59:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7318 to 7237. [2023-04-02 22:59:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7237 states, 5420 states have (on average 1.1099630996309964) internal successors, (6016), 5456 states have internal predecessors, (6016), 1724 states have call successors, (1724), 94 states have call predecessors, (1724), 92 states have return successors, (1722), 1686 states have call predecessors, (1722), 1722 states have call successors, (1722) [2023-04-02 22:59:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7237 states to 7237 states and 9462 transitions. [2023-04-02 22:59:49,135 INFO L78 Accepts]: Start accepts. Automaton has 7237 states and 9462 transitions. Word has length 368 [2023-04-02 22:59:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:59:49,136 INFO L495 AbstractCegarLoop]: Abstraction has 7237 states and 9462 transitions. [2023-04-02 22:59:49,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 22:59:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand 7237 states and 9462 transitions. [2023-04-02 22:59:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-04-02 22:59:49,150 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:59:49,150 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:59:49,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-04-02 22:59:49,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:49,355 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:59:49,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:59:49,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1359052715, now seen corresponding path program 12 times [2023-04-02 22:59:49,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:59:49,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551757591] [2023-04-02 22:59:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:59:49,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:59:49,368 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:59:49,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343505422] [2023-04-02 22:59:49,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:59:49,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:59:49,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:59:49,370 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:59:49,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-04-02 22:59:49,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:59:49,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:59:49,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-02 22:59:49,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:59:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5270 backedges. 416 proven. 1164 refuted. 0 times theorem prover too weak. 3690 trivial. 0 not checked. [2023-04-02 22:59:49,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:59:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5270 backedges. 266 proven. 1204 refuted. 0 times theorem prover too weak. 3800 trivial. 0 not checked. [2023-04-02 22:59:50,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:59:50,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551757591] [2023-04-02 22:59:50,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:59:50,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343505422] [2023-04-02 22:59:50,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343505422] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:59:50,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1970616635] [2023-04-02 22:59:50,373 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 22:59:50,373 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:59:50,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:59:50,374 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:59:50,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:59:50,385 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:59:51,136 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-02 22:59:51,138 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 22:59:51,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:59:51,141 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:59:52,583 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '184801#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:59:52,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:59:52,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:59:52,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2023-04-02 22:59:52,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713531148] [2023-04-02 22:59:52,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:59:52,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-02 22:59:52,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:59:52,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-02 22:59:52,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2101, Unknown=0, NotChecked=0, Total=2256 [2023-04-02 22:59:52,585 INFO L87 Difference]: Start difference. First operand 7237 states and 9462 transitions. Second operand has 32 states, 32 states have (on average 7.375) internal successors, (236), 32 states have internal predecessors, (236), 32 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (75), 32 states have call predecessors, (75), 32 states have call successors, (75) [2023-04-02 22:59:55,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:59:57,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:59:59,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:59:59,175 INFO L93 Difference]: Finished difference Result 10004 states and 13062 transitions. [2023-04-02 22:59:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-02 22:59:59,175 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 7.375) internal successors, (236), 32 states have internal predecessors, (236), 32 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (75), 32 states have call predecessors, (75), 32 states have call successors, (75) Word has length 374 [2023-04-02 22:59:59,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:59:59,190 INFO L225 Difference]: With dead ends: 10004 [2023-04-02 22:59:59,190 INFO L226 Difference]: Without dead ends: 8382 [2023-04-02 22:59:59,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 1011 SyntacticMatches, 64 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2912 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2023-04-02 22:59:59,195 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 350 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 1643 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1643 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-04-02 22:59:59,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 1972 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1643 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2023-04-02 22:59:59,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8382 states. [2023-04-02 23:00:00,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8382 to 7343. [2023-04-02 23:00:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7343 states, 5499 states have (on average 1.110201854882706) internal successors, (6105), 5537 states have internal predecessors, (6105), 1751 states have call successors, (1751), 94 states have call predecessors, (1751), 92 states have return successors, (1749), 1711 states have call predecessors, (1749), 1749 states have call successors, (1749) [2023-04-02 23:00:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7343 states to 7343 states and 9605 transitions. [2023-04-02 23:00:00,339 INFO L78 Accepts]: Start accepts. Automaton has 7343 states and 9605 transitions. Word has length 374 [2023-04-02 23:00:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:00:00,339 INFO L495 AbstractCegarLoop]: Abstraction has 7343 states and 9605 transitions. [2023-04-02 23:00:00,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.375) internal successors, (236), 32 states have internal predecessors, (236), 32 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (75), 32 states have call predecessors, (75), 32 states have call successors, (75) [2023-04-02 23:00:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 7343 states and 9605 transitions. [2023-04-02 23:00:00,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-04-02 23:00:00,350 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:00:00,350 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:00:00,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-04-02 23:00:00,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-04-02 23:00:00,551 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:00:00,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:00:00,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1165838421, now seen corresponding path program 13 times [2023-04-02 23:00:00,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:00:00,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889693516] [2023-04-02 23:00:00,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:00:00,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:00:00,562 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:00:00,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667959729] [2023-04-02 23:00:00,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 23:00:00,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:00:00,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:00:00,563 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:00:00,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-04-02 23:00:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:00:00,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-02 23:00:00,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:00:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5270 backedges. 176 proven. 1296 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2023-04-02 23:00:01,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:00:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5270 backedges. 376 proven. 1096 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2023-04-02 23:00:01,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:00:01,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889693516] [2023-04-02 23:00:01,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:00:01,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667959729] [2023-04-02 23:00:01,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667959729] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:00:01,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1937963664] [2023-04-02 23:00:01,731 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 23:00:01,731 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:00:01,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:00:01,731 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:00:01,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:00:01,742 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:00:02,514 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-02 23:00:02,516 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 23:00:02,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:00:02,519 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:00:04,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '213014#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:00:04,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:00:04,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:00:04,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2023-04-02 23:00:04,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084312219] [2023-04-02 23:00:04,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:00:04,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 23:00:04,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:00:04,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 23:00:04,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2337, Unknown=0, NotChecked=0, Total=2550 [2023-04-02 23:00:04,182 INFO L87 Difference]: Start difference. First operand 7343 states and 9605 transitions. Second operand has 35 states, 35 states have (on average 7.228571428571429) internal successors, (253), 35 states have internal predecessors, (253), 35 states have call successors, (82), 2 states have call predecessors, (82), 1 states have return successors, (80), 34 states have call predecessors, (80), 34 states have call successors, (80) [2023-04-02 23:00:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:00:10,949 INFO L93 Difference]: Finished difference Result 18243 states and 23924 transitions. [2023-04-02 23:00:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-02 23:00:10,949 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 7.228571428571429) internal successors, (253), 35 states have internal predecessors, (253), 35 states have call successors, (82), 2 states have call predecessors, (82), 1 states have return successors, (80), 34 states have call predecessors, (80), 34 states have call successors, (80) Word has length 374 [2023-04-02 23:00:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:00:10,976 INFO L225 Difference]: With dead ends: 18243 [2023-04-02 23:00:10,977 INFO L226 Difference]: Without dead ends: 16536 [2023-04-02 23:00:10,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1194 GetRequests, 1006 SyntacticMatches, 66 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5103 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1789, Invalid=13463, Unknown=0, NotChecked=0, Total=15252 [2023-04-02 23:00:10,984 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 517 mSDsluCounter, 3481 mSDsCounter, 0 mSdLazyCounter, 2931 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 3782 SdHoareTripleChecker+Invalid, 3056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:00:10,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 3782 Invalid, 3056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2931 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 23:00:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16536 states. [2023-04-02 23:00:13,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16536 to 13626. [2023-04-02 23:00:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13626 states, 10208 states have (on average 1.1106974921630095) internal successors, (11338), 10281 states have internal predecessors, (11338), 3325 states have call successors, (3325), 94 states have call predecessors, (3325), 92 states have return successors, (3323), 3250 states have call predecessors, (3323), 3323 states have call successors, (3323) [2023-04-02 23:00:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13626 states to 13626 states and 17986 transitions. [2023-04-02 23:00:13,554 INFO L78 Accepts]: Start accepts. Automaton has 13626 states and 17986 transitions. Word has length 374 [2023-04-02 23:00:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:00:13,555 INFO L495 AbstractCegarLoop]: Abstraction has 13626 states and 17986 transitions. [2023-04-02 23:00:13,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 7.228571428571429) internal successors, (253), 35 states have internal predecessors, (253), 35 states have call successors, (82), 2 states have call predecessors, (82), 1 states have return successors, (80), 34 states have call predecessors, (80), 34 states have call successors, (80) [2023-04-02 23:00:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 13626 states and 17986 transitions. [2023-04-02 23:00:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-04-02 23:00:13,579 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:00:13,580 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:00:13,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-04-02 23:00:13,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-04-02 23:00:13,785 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:00:13,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:00:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1353624661, now seen corresponding path program 14 times [2023-04-02 23:00:13,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:00:13,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288304364] [2023-04-02 23:00:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:00:13,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:00:13,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:00:13,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411402038] [2023-04-02 23:00:13,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:00:13,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:00:13,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:00:13,800 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:00:13,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-04-02 23:00:18,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2023-04-02 23:00:18,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:00:18,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 104 conjunts are in the unsatisfiable core [2023-04-02 23:00:18,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:02:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5270 backedges. 2691 proven. 556 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2023-04-02 23:02:16,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:02:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5270 backedges. 1110 proven. 1004 refuted. 0 times theorem prover too weak. 3156 trivial. 0 not checked. [2023-04-02 23:02:29,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:02:29,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288304364] [2023-04-02 23:02:29,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:02:29,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411402038] [2023-04-02 23:02:29,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411402038] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:02:29,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [69355608] [2023-04-02 23:02:29,801 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 23:02:29,801 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:02:29,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:02:29,801 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:02:29,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:02:29,814 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:02:30,600 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-02 23:02:30,602 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 23:02:30,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:02:30,605 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:02:40,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '263198#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:02:40,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:02:40,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:02:40,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 41 [2023-04-02 23:02:40,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389230948] [2023-04-02 23:02:40,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:02:40,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-02 23:02:40,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:02:40,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-02 23:02:40,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=2879, Unknown=1, NotChecked=0, Total=3192 [2023-04-02 23:02:40,541 INFO L87 Difference]: Start difference. First operand 13626 states and 17986 transitions. Second operand has 41 states, 40 states have (on average 5.375) internal successors, (215), 33 states have internal predecessors, (215), 29 states have call successors, (67), 2 states have call predecessors, (67), 4 states have return successors, (69), 37 states have call predecessors, (69), 29 states have call successors, (69) [2023-04-02 23:02:43,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:02:46,194 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (not (= (mod (+ (* c_main_~v~0 c_main_~v~0) (* c_main_~u~0 c_main_~u~0 3) (* 2 c_main_~v~0) (* c_main_~u~0 2)) 4) 0)))) (and (= (mod (+ c_main_~u~0 1) 2) 0) (= (mod c_main_~A~0 2) 1) (or .cse0 (<= c_main_~r~0 0)) (= c_main_~v~0 1) (<= 0 c_main_~A~0) (or (< c_main_~r~0 (+ c_main_~v~0 1)) .cse0))) is different from false [2023-04-02 23:02:47,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []