/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/loops-crafted-1/sum_natnum.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:24:56,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:24:56,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:24:56,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:24:56,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:24:56,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:24:56,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:24:56,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:24:56,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:24:56,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:24:56,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:24:56,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:24:56,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:24:56,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:24:56,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:24:56,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:24:56,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:24:56,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:24:56,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:24:56,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:24:56,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:24:56,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:24:56,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:24:56,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:24:56,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:24:56,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:24:56,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:24:56,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:24:56,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:24:56,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:24:56,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:24:56,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:24:56,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:24:56,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:24:56,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:24:56,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:24:56,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:24:56,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:24:56,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:24:56,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:24:56,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:24:56,790 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 22:24:56,812 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:24:56,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:24:56,812 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:24:56,812 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:24:56,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:24:56,813 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:24:56,813 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:24:56,814 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:24:56,814 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:24:56,814 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:24:56,814 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:24:56,814 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:24:56,814 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:24:56,815 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:24:56,815 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:24:56,815 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:24:56,815 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:24:56,815 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:24:56,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:24:56,816 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:24:56,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:24:56,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:24:56,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:24:56,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:24:56,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:24:56,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:24:56,817 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:24:56,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:24:56,817 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:24:56,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:24:56,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:24:56,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:24:56,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:24:56,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:24:56,818 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:24:56,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:24:56,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:24:56,819 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:24:56,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:24:56,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:24:56,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:24:56,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:24:57,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:24:57,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:24:57,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:24:57,066 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:24:57,067 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:24:57,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2023-04-02 22:24:58,158 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:24:58,329 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:24:58,329 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2023-04-02 22:24:58,334 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6c1c041d/f1624d47eecd4683ae9d8a20079a1d31/FLAG6147755e4 [2023-04-02 22:24:58,347 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6c1c041d/f1624d47eecd4683ae9d8a20079a1d31 [2023-04-02 22:24:58,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:24:58,351 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:24:58,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:24:58,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:24:58,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:24:58,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:24:58" (1/1) ... [2023-04-02 22:24:58,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a9fcb27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:58, skipping insertion in model container [2023-04-02 22:24:58,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:24:58" (1/1) ... [2023-04-02 22:24:58,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:24:58,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:24:58,484 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/loops-crafted-1/sum_natnum.c[458,471] [2023-04-02 22:24:58,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:24:58,505 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:24:58,517 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/loops-crafted-1/sum_natnum.c[458,471] [2023-04-02 22:24:58,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:24:58,528 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:24:58,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:58 WrapperNode [2023-04-02 22:24:58,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:24:58,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:24:58,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:24:58,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:24:58,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:58" (1/1) ... [2023-04-02 22:24:58,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:58" (1/1) ... [2023-04-02 22:24:58,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:58" (1/1) ... [2023-04-02 22:24:58,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:58" (1/1) ... [2023-04-02 22:24:58,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:58" (1/1) ... [2023-04-02 22:24:58,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:58" (1/1) ... [2023-04-02 22:24:58,549 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:58" (1/1) ... [2023-04-02 22:24:58,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:58" (1/1) ... [2023-04-02 22:24:58,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:24:58,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:24:58,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:24:58,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:24:58,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:58" (1/1) ... [2023-04-02 22:24:58,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:24:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:24:58,581 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 22:24:58,583 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 22:24:58,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:24:58,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:24:58,616 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:24:58,619 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:24:58,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:24:58,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:24:58,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 22:24:58,619 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:24:58,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:24:58,619 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:24:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:24:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:24:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:24:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:24:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:24:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:24:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:24:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:24:58,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:24:58,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:24:58,669 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:24:58,671 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:24:58,767 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:24:58,793 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:24:58,793 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 22:24:58,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:24:58 BoogieIcfgContainer [2023-04-02 22:24:58,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:24:58,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:24:58,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:24:58,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:24:58,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:24:58" (1/3) ... [2023-04-02 22:24:58,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74173dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:24:58, skipping insertion in model container [2023-04-02 22:24:58,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:58" (2/3) ... [2023-04-02 22:24:58,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74173dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:24:58, skipping insertion in model container [2023-04-02 22:24:58,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:24:58" (3/3) ... [2023-04-02 22:24:58,813 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_natnum.c [2023-04-02 22:24:58,827 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:24:58,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:24:58,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:24:58,877 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;@698d5b0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:24:58,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:24:58,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:24:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-02 22:24:58,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:24:58,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:24:58,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:24:58,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:24:58,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1592940235, now seen corresponding path program 1 times [2023-04-02 22:24:58,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:24:58,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048272435] [2023-04-02 22:24:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:24:58,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:24:58,984 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:24:58,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095382183] [2023-04-02 22:24:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:24:58,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:24:58,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:24:58,991 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 22:24:58,994 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 22:24:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:24:59,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 22:24:59,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:24:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:24:59,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:24:59,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:24:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048272435] [2023-04-02 22:24:59,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:24:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095382183] [2023-04-02 22:24:59,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095382183] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:24:59,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:24:59,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 22:24:59,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894648893] [2023-04-02 22:24:59,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:24:59,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 22:24:59,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:24:59,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 22:24:59,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:24:59,157 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:24:59,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:24:59,219 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-04-02 22:24:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 22:24:59,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-02 22:24:59,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:24:59,227 INFO L225 Difference]: With dead ends: 29 [2023-04-02 22:24:59,227 INFO L226 Difference]: Without dead ends: 12 [2023-04-02 22:24:59,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 22:24:59,232 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 21 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 22:24:59,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 21 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:24:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-04-02 22:24:59,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-04-02 22:24:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:24:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-04-02 22:24:59,276 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2023-04-02 22:24:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:24:59,276 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-04-02 22:24:59,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:24:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-04-02 22:24:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 22:24:59,277 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:24:59,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:24:59,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 22:24:59,484 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 22:24:59,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:24:59,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:24:59,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1145893788, now seen corresponding path program 1 times [2023-04-02 22:24:59,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:24:59,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617505315] [2023-04-02 22:24:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:24:59,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:24:59,499 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:24:59,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457755221] [2023-04-02 22:24:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:24:59,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:24:59,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:24:59,501 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 22:24:59,507 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 22:24:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:24:59,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 22:24:59,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:24:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:24:59,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:24:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:24:59,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:24:59,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617505315] [2023-04-02 22:24:59,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:24:59,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457755221] [2023-04-02 22:24:59,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457755221] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:24:59,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [161164678] [2023-04-02 22:24:59,701 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:24:59,702 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:24:59,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:24:59,715 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:24:59,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:24:59,830 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-02 22:24:59,964 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 22:24:59,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:24:59,999 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:25:00,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '181#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:25:00,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:25:00,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:25:00,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 22:25:00,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183815533] [2023-04-02 22:25:00,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:25:00,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 22:25:00,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:25:00,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 22:25:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-04-02 22:25:00,209 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:25:00,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:25:00,363 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-04-02 22:25:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 22:25:00,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 11 [2023-04-02 22:25:00,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:25:00,364 INFO L225 Difference]: With dead ends: 20 [2023-04-02 22:25:00,364 INFO L226 Difference]: Without dead ends: 15 [2023-04-02 22:25:00,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-04-02 22:25:00,366 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:25:00,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:25:00,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-02 22:25:00,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-02 22:25:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:25:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-02 22:25:00,371 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2023-04-02 22:25:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:25:00,371 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-02 22:25:00,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:25:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-02 22:25:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 22:25:00,372 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:25:00,372 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:25:00,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 22:25:00,582 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 22:25:00,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:25:00,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:25:00,583 INFO L85 PathProgramCache]: Analyzing trace with hash 790332171, now seen corresponding path program 2 times [2023-04-02 22:25:00,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:25:00,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581876029] [2023-04-02 22:25:00,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:25:00,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:25:00,606 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:25:00,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073960656] [2023-04-02 22:25:00,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:25:00,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:25:00,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:25:00,611 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 22:25:00,612 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 22:25:00,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 22:25:00,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:25:00,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 22:25:00,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:25:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:25:00,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:25:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:25:00,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:25:00,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581876029] [2023-04-02 22:25:00,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:25:00,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073960656] [2023-04-02 22:25:00,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073960656] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:25:00,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668414884] [2023-04-02 22:25:00,825 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:25:00,825 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:25:00,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:25:00,825 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:25:00,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:25:00,871 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-02 22:25:00,944 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 22:25:00,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:25:00,978 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:25:01,193 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '346#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:25:01,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:25:01,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:25:01,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 22:25:01,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507485617] [2023-04-02 22:25:01,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:25:01,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 22:25:01,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:25:01,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 22:25:01,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2023-04-02 22:25:01,196 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:25:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:25:01,355 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-04-02 22:25:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 22:25:01,355 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-04-02 22:25:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:25:01,356 INFO L225 Difference]: With dead ends: 26 [2023-04-02 22:25:01,356 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 22:25:01,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2023-04-02 22:25:01,358 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:25:01,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:25:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 22:25:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 22:25:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:25:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2023-04-02 22:25:01,362 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2023-04-02 22:25:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:25:01,363 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2023-04-02 22:25:01,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:25:01,363 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2023-04-02 22:25:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 22:25:01,364 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:25:01,364 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:25:01,372 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 22:25:01,564 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 22:25:01,565 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:25:01,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:25:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1912862357, now seen corresponding path program 3 times [2023-04-02 22:25:01,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:25:01,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879376434] [2023-04-02 22:25:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:25:01,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:25:01,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:25:01,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137524489] [2023-04-02 22:25:01,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:25:01,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:25:01,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:25:01,596 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 22:25:01,600 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 22:25:01,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:25:01,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:25:01,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 22:25:01,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:25:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:25:01,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:25:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:25:02,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:25:02,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879376434] [2023-04-02 22:25:02,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:25:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137524489] [2023-04-02 22:25:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137524489] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:25:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1233576767] [2023-04-02 22:25:02,003 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:25:02,003 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:25:02,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:25:02,003 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:25:02,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:25:02,027 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-02 22:25:02,065 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 22:25:02,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:25:02,080 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:25:02,280 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '589#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:25:02,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:25:02,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:25:02,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-02 22:25:02,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276687477] [2023-04-02 22:25:02,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:25:02,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 22:25:02,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:25:02,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 22:25:02,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 22:25:02,283 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:25:04,545 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 22:25:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:25:05,445 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2023-04-02 22:25:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 22:25:05,446 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-04-02 22:25:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:25:05,447 INFO L225 Difference]: With dead ends: 38 [2023-04-02 22:25:05,447 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 22:25:05,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1269, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 22:25:05,448 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-02 22:25:05,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2023-04-02 22:25:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 22:25:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-02 22:25:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:25:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2023-04-02 22:25:05,453 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2023-04-02 22:25:05,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:25:05,453 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2023-04-02 22:25:05,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:25:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2023-04-02 22:25:05,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 22:25:05,454 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:25:05,455 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:25:05,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 22:25:05,660 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 22:25:05,661 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:25:05,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:25:05,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1281343957, now seen corresponding path program 4 times [2023-04-02 22:25:05,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:25:05,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385755941] [2023-04-02 22:25:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:25:05,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:25:05,709 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:25:05,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924195464] [2023-04-02 22:25:05,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:25:05,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:25:05,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:25:05,711 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 22:25:05,714 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 22:25:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:25:05,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 22:25:05,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:25:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:25:06,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:25:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:25:06,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:25:06,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385755941] [2023-04-02 22:25:06,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:25:06,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924195464] [2023-04-02 22:25:06,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924195464] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:25:06,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470778277] [2023-04-02 22:25:06,839 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:25:06,839 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:25:06,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:25:06,839 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:25:06,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:25:06,869 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-02 22:25:06,902 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 22:25:06,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:25:06,917 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:25:07,195 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '988#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:25:07,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:25:07,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:25:07,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-02 22:25:07,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783341241] [2023-04-02 22:25:07,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:25:07,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-02 22:25:07,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:25:07,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-02 22:25:07,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1219, Invalid=2087, Unknown=0, NotChecked=0, Total=3306 [2023-04-02 22:25:07,200 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:25:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:25:08,035 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2023-04-02 22:25:08,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-02 22:25:08,035 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-04-02 22:25:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:25:08,036 INFO L225 Difference]: With dead ends: 62 [2023-04-02 22:25:08,037 INFO L226 Difference]: Without dead ends: 57 [2023-04-02 22:25:08,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2369, Invalid=4111, Unknown=0, NotChecked=0, Total=6480 [2023-04-02 22:25:08,040 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:25:08,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 33 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:25:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-02 22:25:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-04-02 22:25:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:25:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2023-04-02 22:25:08,048 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2023-04-02 22:25:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:25:08,049 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2023-04-02 22:25:08,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:25:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2023-04-02 22:25:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 22:25:08,050 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:25:08,050 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:25:08,056 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 22:25:08,256 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 22:25:08,256 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:25:08,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:25:08,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1885161387, now seen corresponding path program 5 times [2023-04-02 22:25:08,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:25:08,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647133038] [2023-04-02 22:25:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:25:08,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:25:08,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:25:08,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930468578] [2023-04-02 22:25:08,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:25:08,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:25:08,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:25:08,294 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 22:25:08,315 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 22:25:08,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-04-02 22:25:08,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:25:08,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-02 22:25:08,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:25:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:25:09,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:25:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:25:11,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:25:11,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647133038] [2023-04-02 22:25:11,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:25:11,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930468578] [2023-04-02 22:25:11,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930468578] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:25:11,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448883793] [2023-04-02 22:25:11,661 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:25:11,662 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:25:11,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:25:11,663 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:25:11,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:25:11,686 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-02 22:25:11,709 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 22:25:11,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:25:11,720 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:25:12,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1700#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:25:12,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:25:12,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:25:12,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2023-04-02 22:25:12,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42762398] [2023-04-02 22:25:12,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:25:12,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-04-02 22:25:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:25:12,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-04-02 22:25:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4699, Invalid=6431, Unknown=0, NotChecked=0, Total=11130 [2023-04-02 22:25:12,083 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:25:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:25:14,645 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2023-04-02 22:25:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-02 22:25:14,652 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2023-04-02 22:25:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:25:14,654 INFO L225 Difference]: With dead ends: 110 [2023-04-02 22:25:14,654 INFO L226 Difference]: Without dead ends: 105 [2023-04-02 22:25:14,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5834 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9305, Invalid=13951, Unknown=0, NotChecked=0, Total=23256 [2023-04-02 22:25:14,660 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 107 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:25:14,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 25 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:25:14,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-02 22:25:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-04-02 22:25:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:25:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2023-04-02 22:25:14,673 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 56 [2023-04-02 22:25:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:25:14,674 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2023-04-02 22:25:14,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.030612244897959) internal successors, (101), 97 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:25:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2023-04-02 22:25:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-02 22:25:14,676 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:25:14,676 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:25:14,685 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 22:25:14,882 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 22:25:14,883 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:25:14,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:25:14,883 INFO L85 PathProgramCache]: Analyzing trace with hash -622208341, now seen corresponding path program 6 times [2023-04-02 22:25:14,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:25:14,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140102406] [2023-04-02 22:25:14,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:25:14,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:25:14,946 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:25:14,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809618611] [2023-04-02 22:25:14,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:25:14,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:25:14,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:25:14,947 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 22:25:14,960 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 22:25:15,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:25:15,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:25:15,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 97 conjunts are in the unsatisfiable core [2023-04-02 22:25:15,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:25:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:25:18,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:25:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:25:25,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:25:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140102406] [2023-04-02 22:25:25,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:25:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809618611] [2023-04-02 22:25:25,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809618611] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:25:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935646278] [2023-04-02 22:25:25,227 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:25:25,227 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:25:25,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:25:25,227 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:25:25,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:25:25,250 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-02 22:25:25,291 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 22:25:25,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:25:25,331 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:25:25,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3036#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:25:25,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:25:25,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:25:25,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2023-04-02 22:25:25,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547393000] [2023-04-02 22:25:25,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:25:25,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-04-02 22:25:25,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:25:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-04-02 22:25:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18571, Invalid=22031, Unknown=0, NotChecked=0, Total=40602 [2023-04-02 22:25:25,882 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 194 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 193 states have internal predecessors, (197), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:25:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:25:34,641 INFO L93 Difference]: Finished difference Result 206 states and 301 transitions. [2023-04-02 22:25:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-04-02 22:25:34,645 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 193 states have internal predecessors, (197), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 104 [2023-04-02 22:25:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:25:34,647 INFO L225 Difference]: With dead ends: 206 [2023-04-02 22:25:34,647 INFO L226 Difference]: Without dead ends: 201 [2023-04-02 22:25:34,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20906 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=37001, Invalid=50911, Unknown=0, NotChecked=0, Total=87912 [2023-04-02 22:25:34,654 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 203 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:25:34,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 33 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 22:25:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-04-02 22:25:34,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-04-02 22:25:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:25:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2023-04-02 22:25:34,674 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 104 [2023-04-02 22:25:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:25:34,675 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2023-04-02 22:25:34,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 193 states have internal predecessors, (197), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:25:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2023-04-02 22:25:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-02 22:25:34,680 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:25:34,680 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:25:34,689 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 22:25:34,885 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 22:25:34,885 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:25:34,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:25:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1907556181, now seen corresponding path program 7 times [2023-04-02 22:25:34,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:25:34,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607903076] [2023-04-02 22:25:34,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:25:34,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:25:35,007 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:25:35,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18098832] [2023-04-02 22:25:35,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:25:35,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:25:35,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:25:35,018 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 22:25:35,020 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 22:25:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:25:35,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 193 conjunts are in the unsatisfiable core [2023-04-02 22:25:35,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:25:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:25:48,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:26:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:26:13,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:26:13,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607903076] [2023-04-02 22:26:13,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:26:13,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18098832] [2023-04-02 22:26:13,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18098832] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:26:13,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207525985] [2023-04-02 22:26:13,811 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:26:13,811 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:26:13,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:26:13,811 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:26:13,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:26:13,825 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-04-02 22:26:13,859 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2023-04-02 22:26:13,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:26:13,876 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:26:14,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5620#(and (<= 1 |#StackHeapBarrier|) (= ~SIZE~0 40000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:26:14,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:26:14,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:26:14,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 386 [2023-04-02 22:26:14,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453754957] [2023-04-02 22:26:14,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:26:14,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2023-04-02 22:26:14,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:26:14,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2023-04-02 22:26:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73963, Invalid=80879, Unknown=0, NotChecked=0, Total=154842 [2023-04-02 22:26:14,871 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand has 386 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 385 states have internal predecessors, (389), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:26:53,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:26:54,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:26:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:26:54,684 INFO L93 Difference]: Finished difference Result 398 states and 589 transitions. [2023-04-02 22:26:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2023-04-02 22:26:54,685 INFO L78 Accepts]: Start accepts. Automaton has has 386 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 385 states have internal predecessors, (389), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 200 [2023-04-02 22:26:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:26:54,689 INFO L225 Difference]: With dead ends: 398 [2023-04-02 22:26:54,689 INFO L226 Difference]: Without dead ends: 393 [2023-04-02 22:26:54,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 583 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78698 ImplicationChecksByTransitivity, 72.8s TimeCoverageRelationStatistics Valid=147689, Invalid=193951, Unknown=0, NotChecked=0, Total=341640 [2023-04-02 22:26:54,705 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 395 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-02 22:26:54,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 25 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 404 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-04-02 22:26:54,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-04-02 22:26:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2023-04-02 22:26:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 388 states have (on average 1.0025773195876289) internal successors, (389), 388 states have internal predecessors, (389), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:26:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 393 transitions. [2023-04-02 22:26:54,737 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 393 transitions. Word has length 200 [2023-04-02 22:26:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:26:54,738 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 393 transitions. [2023-04-02 22:26:54,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 386 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 385 states have internal predecessors, (389), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:26:54,739 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 393 transitions. [2023-04-02 22:26:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2023-04-02 22:26:54,745 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:26:54,745 INFO L195 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:26:54,759 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 22:26:54,954 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 22:26:54,954 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:26:54,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:26:54,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1044073643, now seen corresponding path program 8 times [2023-04-02 22:26:54,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:26:54,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422921150] [2023-04-02 22:26:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:26:54,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:26:55,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:26:55,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923198750] [2023-04-02 22:26:55,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:26:55,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:26:55,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:26:55,033 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 22:26:55,036 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 22:26:56,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2023-04-02 22:26:56,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:26:56,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 1968 conjuncts, 385 conjunts are in the unsatisfiable core [2023-04-02 22:26:56,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:27:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:27:48,361 INFO L327 TraceCheckSpWp]: Computing backward predicates...