/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 IntervalDomain -i ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:15:49,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:15:49,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:15:49,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:15:49,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:15:49,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:15:49,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:15:49,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:15:49,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:15:49,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:15:49,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:15:49,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:15:49,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:15:49,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:15:49,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:15:49,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:15:49,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:15:49,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:15:49,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:15:49,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:15:49,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:15:49,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:15:49,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:15:49,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:15:49,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:15:49,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:15:49,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:15:49,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:15:49,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:15:49,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:15:49,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:15:49,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:15:49,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:15:49,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:15:49,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:15:49,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:15:49,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:15:49,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:15:49,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:15:49,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:15:49,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:15:49,827 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 [2023-03-31 23:15:49,854 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:15:49,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:15:49,855 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:15:49,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:15:49,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:15:49,856 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:15:49,856 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:15:49,856 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:15:49,856 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:15:49,856 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:15:49,857 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:15:49,857 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:15:49,858 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:15:49,858 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:15:49,858 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:15:49,858 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:15:49,858 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:15:49,858 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:15:49,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:15:49,859 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:15:49,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:15:49,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:15:49,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:15:49,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:15:49,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:15:49,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:15:49,860 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:15:49,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:15:49,860 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:15:49,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:15:49,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:15:49,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:15:49,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:15:49,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:15:49,861 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:15:49,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:15:49,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:15:49,862 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:15:49,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:15:49,862 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:15:49,862 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:15:49,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:15:50,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:15:50,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:15:50,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:15:50,120 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:15:50,120 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:15:50,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.c [2023-03-31 23:15:51,307 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:15:51,502 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:15:51,503 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.c [2023-03-31 23:15:51,508 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/675a9e26d/3b4f8cb5f4e64b2ba147df6d7ba8f0f5/FLAGff9c0d7cf [2023-03-31 23:15:51,519 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/675a9e26d/3b4f8cb5f4e64b2ba147df6d7ba8f0f5 [2023-03-31 23:15:51,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:15:51,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:15:51,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:15:51,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:15:51,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:15:51,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:15:51" (1/1) ... [2023-03-31 23:15:51,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5ed352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:15:51, skipping insertion in model container [2023-03-31 23:15:51,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:15:51" (1/1) ... [2023-03-31 23:15:51,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:15:51,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:15:51,677 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.c[489,502] [2023-03-31 23:15:51,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:15:51,709 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:15:51,720 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.c[489,502] [2023-03-31 23:15:51,729 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:15:51,742 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:15:51,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:15:51 WrapperNode [2023-03-31 23:15:51,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:15:51,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:15:51,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:15:51,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:15:51,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:15:51" (1/1) ... [2023-03-31 23:15:51,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:15:51" (1/1) ... [2023-03-31 23:15:51,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:15:51" (1/1) ... [2023-03-31 23:15:51,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:15:51" (1/1) ... [2023-03-31 23:15:51,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:15:51" (1/1) ... [2023-03-31 23:15:51,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:15:51" (1/1) ... [2023-03-31 23:15:51,785 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:15:51" (1/1) ... [2023-03-31 23:15:51,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:15:51" (1/1) ... [2023-03-31 23:15:51,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:15:51,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:15:51,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:15:51,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:15:51,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:15:51" (1/1) ... [2023-03-31 23:15:51,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:15:51,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:15:51,817 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) [2023-03-31 23:15:51,838 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 [2023-03-31 23:15:51,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:15:51,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:15:51,853 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:15:51,855 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:15:51,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:15:51,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:15:51,855 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:15:51,855 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:15:51,855 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:15:51,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:15:51,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:15:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:15:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:15:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:15:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:15:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:15:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:15:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:15:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:15:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:15:51,919 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:15:51,921 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:15:52,073 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:15:52,134 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:15:52,135 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 23:15:52,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:15:52 BoogieIcfgContainer [2023-03-31 23:15:52,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:15:52,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:15:52,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:15:52,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:15:52,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:15:51" (1/3) ... [2023-03-31 23:15:52,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409f29db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:15:52, skipping insertion in model container [2023-03-31 23:15:52,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:15:51" (2/3) ... [2023-03-31 23:15:52,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409f29db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:15:52, skipping insertion in model container [2023-03-31 23:15:52,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:15:52" (3/3) ... [2023-03-31 23:15:52,143 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound5.c [2023-03-31 23:15:52,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:15:52,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:15:52,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:15:52,209 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;@4224c4ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:15:52,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:15:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-03-31 23:15:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 23:15:52,220 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:15:52,220 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:15:52,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:15:52,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:15:52,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1201008584, now seen corresponding path program 1 times [2023-03-31 23:15:52,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:15:52,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45522659] [2023-03-31 23:15:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:52,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:15:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:15:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:15:52,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:15:52,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45522659] [2023-03-31 23:15:52,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45522659] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:15:52,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:15:52,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 23:15:52,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853840684] [2023-03-31 23:15:52,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:15:52,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 23:15:52,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:15:52,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 23:15:52,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:15:52,517 INFO L87 Difference]: Start difference. First operand has 32 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:15:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:15:52,566 INFO L93 Difference]: Finished difference Result 51 states and 77 transitions. [2023-03-31 23:15:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 23:15:52,568 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 24 [2023-03-31 23:15:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:15:52,574 INFO L225 Difference]: With dead ends: 51 [2023-03-31 23:15:52,574 INFO L226 Difference]: Without dead ends: 28 [2023-03-31 23:15:52,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:15:52,581 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:15:52,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:15:52,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-31 23:15:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-03-31 23:15:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-03-31 23:15:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-03-31 23:15:52,625 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 24 [2023-03-31 23:15:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:15:52,626 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-03-31 23:15:52,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:15:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-03-31 23:15:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 23:15:52,630 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:15:52,630 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:15:52,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:15:52,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:15:52,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:15:52,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1269527884, now seen corresponding path program 1 times [2023-03-31 23:15:52,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:15:52,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911550130] [2023-03-31 23:15:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:52,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:15:52,681 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:15:52,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040052444] [2023-03-31 23:15:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:52,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:15:52,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:15:52,685 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) [2023-03-31 23:15:52,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:15:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:15:52,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:15:52,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:15:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:15:52,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:15:52,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:15:52,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911550130] [2023-03-31 23:15:52,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:15:52,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040052444] [2023-03-31 23:15:52,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040052444] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:15:52,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:15:52,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 23:15:52,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506446593] [2023-03-31 23:15:52,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:15:52,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:15:52,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:15:52,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:15:52,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:15:52,888 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:15:52,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:15:52,985 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2023-03-31 23:15:52,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:15:52,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 24 [2023-03-31 23:15:52,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:15:52,987 INFO L225 Difference]: With dead ends: 43 [2023-03-31 23:15:52,987 INFO L226 Difference]: Without dead ends: 41 [2023-03-31 23:15:52,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:15:52,988 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:15:52,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 101 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:15:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-03-31 23:15:52,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-03-31 23:15:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-03-31 23:15:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2023-03-31 23:15:53,000 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 24 [2023-03-31 23:15:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:15:53,000 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2023-03-31 23:15:53,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:15:53,000 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2023-03-31 23:15:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 23:15:53,001 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:15:53,002 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:15:53,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:15:53,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:15:53,205 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:15:53,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:15:53,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1521017309, now seen corresponding path program 1 times [2023-03-31 23:15:53,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:15:53,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714158256] [2023-03-31 23:15:53,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:53,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:15:53,222 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:15:53,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938033581] [2023-03-31 23:15:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:53,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:15:53,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:15:53,224 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) [2023-03-31 23:15:53,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:15:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:15:53,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:15:53,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:15:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:15:53,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:15:53,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:15:53,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714158256] [2023-03-31 23:15:53,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:15:53,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938033581] [2023-03-31 23:15:53,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938033581] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:15:53,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1110959764] [2023-03-31 23:15:53,628 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 23:15:53,628 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:15:53,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:15:53,635 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:15:53,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:15:53,742 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:15:54,084 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 23:15:54,100 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:15:54,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:15:54,124 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:15:54,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '483#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:15:54,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:15:54,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:15:54,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-03-31 23:15:54,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950379303] [2023-03-31 23:15:54,600 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:15:54,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:15:54,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:15:54,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:15:54,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-03-31 23:15:54,604 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 23:15:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:15:54,772 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2023-03-31 23:15:54,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:15:54,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 29 [2023-03-31 23:15:54,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:15:54,775 INFO L225 Difference]: With dead ends: 47 [2023-03-31 23:15:54,775 INFO L226 Difference]: Without dead ends: 45 [2023-03-31 23:15:54,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:15:54,779 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:15:54,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 106 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:15:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-03-31 23:15:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-03-31 23:15:54,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-03-31 23:15:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2023-03-31 23:15:54,799 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 29 [2023-03-31 23:15:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:15:54,799 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2023-03-31 23:15:54,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 23:15:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2023-03-31 23:15:54,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-31 23:15:54,800 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:15:54,800 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:15:54,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:15:55,005 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,SelfDestructingSolverStorable2 [2023-03-31 23:15:55,006 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:15:55,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:15:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1686147116, now seen corresponding path program 1 times [2023-03-31 23:15:55,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:15:55,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928076629] [2023-03-31 23:15:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:55,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:15:55,021 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:15:55,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876302353] [2023-03-31 23:15:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:55,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:15:55,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:15:55,027 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) [2023-03-31 23:15:55,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:15:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:15:55,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-31 23:15:55,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:15:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:15:55,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:15:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 23:15:55,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:15:55,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928076629] [2023-03-31 23:15:55,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:15:55,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876302353] [2023-03-31 23:15:55,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876302353] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:15:55,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:15:55,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2023-03-31 23:15:55,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950727182] [2023-03-31 23:15:55,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:15:55,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:15:55,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:15:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:15:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:15:55,346 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 23:15:55,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:15:55,419 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2023-03-31 23:15:55,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:15:55,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 34 [2023-03-31 23:15:55,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:15:55,424 INFO L225 Difference]: With dead ends: 51 [2023-03-31 23:15:55,424 INFO L226 Difference]: Without dead ends: 47 [2023-03-31 23:15:55,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-03-31 23:15:55,425 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:15:55,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 98 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:15:55,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-03-31 23:15:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-03-31 23:15:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-03-31 23:15:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2023-03-31 23:15:55,433 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 34 [2023-03-31 23:15:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:15:55,433 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2023-03-31 23:15:55,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 23:15:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2023-03-31 23:15:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-31 23:15:55,434 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:15:55,435 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:15:55,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:15:55,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:15:55,641 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:15:55,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:15:55,642 INFO L85 PathProgramCache]: Analyzing trace with hash -109978194, now seen corresponding path program 1 times [2023-03-31 23:15:55,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:15:55,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792668357] [2023-03-31 23:15:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:55,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:15:55,665 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:15:55,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634407331] [2023-03-31 23:15:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:55,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:15:55,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:15:55,672 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) [2023-03-31 23:15:55,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:15:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:15:55,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 23:15:55,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:15:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:15:55,741 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:15:55,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:15:55,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792668357] [2023-03-31 23:15:55,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:15:55,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634407331] [2023-03-31 23:15:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634407331] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:15:55,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:15:55,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:15:55,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729177820] [2023-03-31 23:15:55,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:15:55,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:15:55,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:15:55,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:15:55,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:15:55,744 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-03-31 23:15:55,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:15:55,783 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2023-03-31 23:15:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:15:55,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 40 [2023-03-31 23:15:55,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:15:55,785 INFO L225 Difference]: With dead ends: 53 [2023-03-31 23:15:55,785 INFO L226 Difference]: Without dead ends: 51 [2023-03-31 23:15:55,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:15:55,786 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:15:55,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 110 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:15:55,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-03-31 23:15:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-03-31 23:15:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-03-31 23:15:55,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-03-31 23:15:55,794 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 40 [2023-03-31 23:15:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:15:55,795 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-03-31 23:15:55,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-03-31 23:15:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-03-31 23:15:55,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 23:15:55,796 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:15:55,796 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:15:55,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:15:56,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:15:56,002 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:15:56,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:15:56,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1626365341, now seen corresponding path program 1 times [2023-03-31 23:15:56,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:15:56,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212703159] [2023-03-31 23:15:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:56,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:15:56,029 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:15:56,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139446362] [2023-03-31 23:15:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:56,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:15:56,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:15:56,032 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) [2023-03-31 23:15:56,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:15:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:15:56,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 23:15:56,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:15:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 23:15:56,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:15:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 23:15:56,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:15:56,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212703159] [2023-03-31 23:15:56,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:15:56,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139446362] [2023-03-31 23:15:56,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139446362] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:15:56,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1875066994] [2023-03-31 23:15:56,455 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:15:56,455 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:15:56,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:15:56,456 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:15:56,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:15:56,476 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:15:56,886 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:15:56,890 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:15:56,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:15:56,894 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:15:57,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1556#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:15:57,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:15:57,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:15:57,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2023-03-31 23:15:57,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673840219] [2023-03-31 23:15:57,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:15:57,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 23:15:57,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:15:57,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 23:15:57,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2023-03-31 23:15:57,183 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-03-31 23:15:57,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:15:57,380 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2023-03-31 23:15:57,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 23:15:57,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 41 [2023-03-31 23:15:57,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:15:57,384 INFO L225 Difference]: With dead ends: 66 [2023-03-31 23:15:57,384 INFO L226 Difference]: Without dead ends: 64 [2023-03-31 23:15:57,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:15:57,385 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:15:57,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 123 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:15:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-03-31 23:15:57,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2023-03-31 23:15:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-03-31 23:15:57,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-03-31 23:15:57,395 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 41 [2023-03-31 23:15:57,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:15:57,396 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-03-31 23:15:57,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-03-31 23:15:57,396 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-03-31 23:15:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 23:15:57,397 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:15:57,397 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:15:57,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:15:57,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:15:57,603 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:15:57,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:15:57,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1565532503, now seen corresponding path program 1 times [2023-03-31 23:15:57,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:15:57,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295611569] [2023-03-31 23:15:57,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:57,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:15:57,623 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:15:57,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179861120] [2023-03-31 23:15:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:57,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:15:57,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:15:57,624 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) [2023-03-31 23:15:57,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:15:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:15:57,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-31 23:15:57,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:15:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:15:57,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:15:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 23:15:57,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:15:57,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295611569] [2023-03-31 23:15:57,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:15:57,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179861120] [2023-03-31 23:15:57,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179861120] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:15:57,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [691055639] [2023-03-31 23:15:57,834 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-03-31 23:15:57,834 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:15:57,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:15:57,834 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:15:57,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:15:57,853 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:15:58,086 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 23:15:58,093 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:15:58,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:15:58,098 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:15:58,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2039#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:15:58,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:15:58,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:15:58,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2023-03-31 23:15:58,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064965433] [2023-03-31 23:15:58,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:15:58,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 23:15:58,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:15:58,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 23:15:58,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2023-03-31 23:15:58,681 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-03-31 23:15:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:15:58,871 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2023-03-31 23:15:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:15:58,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 45 [2023-03-31 23:15:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:15:58,872 INFO L225 Difference]: With dead ends: 61 [2023-03-31 23:15:58,873 INFO L226 Difference]: Without dead ends: 57 [2023-03-31 23:15:58,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:15:58,874 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:15:58,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 120 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:15:58,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-03-31 23:15:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-03-31 23:15:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 23:15:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-03-31 23:15:58,884 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 45 [2023-03-31 23:15:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:15:58,885 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-03-31 23:15:58,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-03-31 23:15:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-03-31 23:15:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-31 23:15:58,886 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:15:58,886 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:15:58,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 23:15:59,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:15:59,092 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:15:59,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:15:59,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1584235564, now seen corresponding path program 2 times [2023-03-31 23:15:59,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:15:59,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147921645] [2023-03-31 23:15:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:15:59,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:15:59,102 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:15:59,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449698721] [2023-03-31 23:15:59,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:15:59,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:15:59,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:15:59,104 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) [2023-03-31 23:15:59,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 23:15:59,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 23:15:59,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:15:59,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2023-03-31 23:15:59,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:15:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-31 23:15:59,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:15:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 23:15:59,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:15:59,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147921645] [2023-03-31 23:15:59,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:15:59,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449698721] [2023-03-31 23:15:59,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449698721] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:15:59,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7275118] [2023-03-31 23:15:59,567 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:15:59,567 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:15:59,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:15:59,567 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:15:59,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:15:59,580 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:15:59,878 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:15:59,882 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:15:59,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:15:59,886 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:16:00,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2520#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:16:00,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:16:00,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:16:00,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-03-31 23:16:00,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100273459] [2023-03-31 23:16:00,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:16:00,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 23:16:00,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:00,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 23:16:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2023-03-31 23:16:00,266 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-03-31 23:16:01,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:01,881 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2023-03-31 23:16:01,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:16:01,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 46 [2023-03-31 23:16:01,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:01,882 INFO L225 Difference]: With dead ends: 81 [2023-03-31 23:16:01,883 INFO L226 Difference]: Without dead ends: 79 [2023-03-31 23:16:01,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:16:01,884 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:01,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 135 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-31 23:16:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-03-31 23:16:01,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2023-03-31 23:16:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-03-31 23:16:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2023-03-31 23:16:01,900 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 46 [2023-03-31 23:16:01,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:01,901 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2023-03-31 23:16:01,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-03-31 23:16:01,901 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2023-03-31 23:16:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-31 23:16:01,902 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:01,902 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:01,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:02,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:02,109 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:02,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:02,109 INFO L85 PathProgramCache]: Analyzing trace with hash -320866109, now seen corresponding path program 3 times [2023-03-31 23:16:02,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:02,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524038059] [2023-03-31 23:16:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:02,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:02,127 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:02,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083349156] [2023-03-31 23:16:02,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:16:02,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:02,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:02,132 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) [2023-03-31 23:16:02,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 23:16:02,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:16:02,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:16:02,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2023-03-31 23:16:02,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-31 23:16:02,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-03-31 23:16:02,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:02,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524038059] [2023-03-31 23:16:02,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:02,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083349156] [2023-03-31 23:16:02,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083349156] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:16:02,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876787081] [2023-03-31 23:16:02,887 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:16:02,887 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:16:02,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:16:02,888 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:16:02,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:16:02,900 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:16:03,170 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:16:03,173 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:16:03,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:16:03,177 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:16:03,589 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3092#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:16:03,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:16:03,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:16:03,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-03-31 23:16:03,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160866428] [2023-03-31 23:16:03,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:16:03,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 23:16:03,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 23:16:03,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:16:03,591 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) [2023-03-31 23:16:06,088 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 [] [2023-03-31 23:16:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:06,176 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2023-03-31 23:16:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:16:06,177 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) Word has length 51 [2023-03-31 23:16:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:06,178 INFO L225 Difference]: With dead ends: 87 [2023-03-31 23:16:06,178 INFO L226 Difference]: Without dead ends: 69 [2023-03-31 23:16:06,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2023-03-31 23:16:06,180 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:06,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 109 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 305 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-03-31 23:16:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-03-31 23:16:06,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-03-31 23:16:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-03-31 23:16:06,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2023-03-31 23:16:06,205 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 51 [2023-03-31 23:16:06,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:06,206 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2023-03-31 23:16:06,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) [2023-03-31 23:16:06,206 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2023-03-31 23:16:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-03-31 23:16:06,210 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:06,210 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:06,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:06,418 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,SelfDestructingSolverStorable8 [2023-03-31 23:16:06,419 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:06,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:06,419 INFO L85 PathProgramCache]: Analyzing trace with hash 834324404, now seen corresponding path program 4 times [2023-03-31 23:16:06,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:06,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340717840] [2023-03-31 23:16:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:06,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:06,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:06,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283543456] [2023-03-31 23:16:06,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 23:16:06,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:06,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:06,431 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) [2023-03-31 23:16:06,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 23:16:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:06,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 51 conjunts are in the unsatisfiable core [2023-03-31 23:16:06,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-03-31 23:16:09,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 63 proven. 29 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-03-31 23:16:13,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:13,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340717840] [2023-03-31 23:16:13,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:13,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283543456] [2023-03-31 23:16:13,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283543456] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:16:13,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1652909073] [2023-03-31 23:16:13,950 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:16:13,950 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:16:13,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:16:13,951 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:16:13,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:16:13,965 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:16:14,212 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:16:14,216 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:16:14,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:16:14,218 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:16:15,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3847#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:16:15,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:16:15,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:16:15,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2023-03-31 23:16:15,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136082500] [2023-03-31 23:16:15,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:16:15,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-03-31 23:16:15,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:15,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-03-31 23:16:15,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 23:16:15,300 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 14 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2023-03-31 23:16:20,972 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 [] [2023-03-31 23:16:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:21,449 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2023-03-31 23:16:21,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-31 23:16:21,449 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 14 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) Word has length 80 [2023-03-31 23:16:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:21,450 INFO L225 Difference]: With dead ends: 86 [2023-03-31 23:16:21,450 INFO L226 Difference]: Without dead ends: 0 [2023-03-31 23:16:21,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2023-03-31 23:16:21,452 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:21,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 138 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 428 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-03-31 23:16:21,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-03-31 23:16:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-03-31 23:16:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-03-31 23:16:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-03-31 23:16:21,454 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2023-03-31 23:16:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:21,454 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-03-31 23:16:21,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 14 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2023-03-31 23:16:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-03-31 23:16:21,454 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-03-31 23:16:21,456 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 23:16:21,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:21,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 23:16:21,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-03-31 23:16:29,090 WARN L223 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 57 DAG size of output: 35 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-03-31 23:16:36,278 WARN L223 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 57 DAG size of output: 35 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-03-31 23:16:40,990 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2023-03-31 23:16:40,991 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 4) no Hoare annotation was computed. [2023-03-31 23:16:40,991 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 7 9) the Hoare annotation is: true [2023-03-31 23:16:40,991 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2023-03-31 23:16:40,991 INFO L895 garLoopResultBuilder]: At program point L35-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (= main_~b~0 main_~a~0))) (or (and (= main_~r~0 0) .cse0 (= main_~s~0 1) (= main_~b~0 main_~y~0) (= main_~q~0 0) (= main_~a~0 main_~x~0) (= main_~p~0 1)) (and .cse0 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1))))) [2023-03-31 23:16:40,991 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~x~0 5)) [2023-03-31 23:16:40,991 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 18 59) no Hoare annotation was computed. [2023-03-31 23:16:40,991 INFO L895 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) [2023-03-31 23:16:40,991 INFO L895 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (let ((.cse0 (= main_~b~0 main_~a~0))) (or (and (= main_~r~0 0) .cse0 (= main_~s~0 1) (= main_~b~0 main_~y~0) (= main_~q~0 0) (= main_~a~0 main_~x~0) (= main_~p~0 1)) (and .cse0 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1))))) [2023-03-31 23:16:40,991 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 18 59) the Hoare annotation is: true [2023-03-31 23:16:40,991 INFO L899 garLoopResultBuilder]: For program point L38(lines 35 52) no Hoare annotation was computed. [2023-03-31 23:16:40,992 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (and (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~x~0 5) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1))) [2023-03-31 23:16:40,992 INFO L895 garLoopResultBuilder]: At program point L36-1(line 36) the Hoare annotation is: (and (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~x~0 5) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1))) [2023-03-31 23:16:40,992 INFO L899 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2023-03-31 23:16:40,992 INFO L899 garLoopResultBuilder]: For program point L57(line 57) no Hoare annotation was computed. [2023-03-31 23:16:40,992 INFO L895 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 5)) [2023-03-31 23:16:40,992 INFO L895 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 5)) [2023-03-31 23:16:40,992 INFO L895 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (* main_~q~0 main_~x~0))) (or (and (= main_~b~0 main_~a~0) (= main_~b~0 (+ .cse0 (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1))) (and (= main_~r~0 0) (= main_~b~0 (+ .cse0 main_~y~0)) (= main_~s~0 1) (= main_~a~0 main_~x~0) (= main_~p~0 1)))) [2023-03-31 23:16:40,992 INFO L902 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2023-03-31 23:16:40,992 INFO L899 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2023-03-31 23:16:40,992 INFO L895 garLoopResultBuilder]: At program point L43-2(lines 35 52) the Hoare annotation is: (and (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~x~0 5) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1))) [2023-03-31 23:16:40,992 INFO L895 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (and (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~x~0 5) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1))) [2023-03-31 23:16:40,992 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-03-31 23:16:40,992 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-03-31 23:16:40,992 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-03-31 23:16:40,992 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-03-31 23:16:40,992 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-03-31 23:16:40,993 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-03-31 23:16:40,993 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2023-03-31 23:16:40,993 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2023-03-31 23:16:40,993 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2023-03-31 23:16:40,993 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 10 16) the Hoare annotation is: true [2023-03-31 23:16:40,993 INFO L899 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2023-03-31 23:16:40,993 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2023-03-31 23:16:40,996 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:40,997 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 23:16:41,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 11:16:41 BoogieIcfgContainer [2023-03-31 23:16:41,008 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 23:16:41,009 INFO L158 Benchmark]: Toolchain (without parser) took 49486.20ms. Allocated memory was 247.5MB in the beginning and 429.9MB in the end (delta: 182.5MB). Free memory was 208.5MB in the beginning and 192.0MB in the end (delta: 16.6MB). Peak memory consumption was 249.9MB. Max. memory is 8.0GB. [2023-03-31 23:16:41,009 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 179.3MB. Free memory is still 125.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 23:16:41,009 INFO L158 Benchmark]: CACSL2BoogieTranslator took 219.32ms. Allocated memory is still 247.5MB. Free memory was 208.5MB in the beginning and 197.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-03-31 23:16:41,009 INFO L158 Benchmark]: Boogie Preprocessor took 44.03ms. Allocated memory is still 247.5MB. Free memory was 197.5MB in the beginning and 196.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 23:16:41,010 INFO L158 Benchmark]: RCFGBuilder took 348.31ms. Allocated memory is still 247.5MB. Free memory was 196.0MB in the beginning and 181.8MB in the end (delta: 14.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-03-31 23:16:41,010 INFO L158 Benchmark]: TraceAbstraction took 48869.97ms. Allocated memory was 247.5MB in the beginning and 429.9MB in the end (delta: 182.5MB). Free memory was 181.3MB in the beginning and 192.0MB in the end (delta: -10.7MB). Peak memory consumption was 222.6MB. Max. memory is 8.0GB. [2023-03-31 23:16:41,011 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 179.3MB. Free memory is still 125.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 219.32ms. Allocated memory is still 247.5MB. Free memory was 208.5MB in the beginning and 197.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.03ms. Allocated memory is still 247.5MB. Free memory was 197.5MB in the beginning and 196.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 348.31ms. Allocated memory is still 247.5MB. Free memory was 196.0MB in the beginning and 181.8MB in the end (delta: 14.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 48869.97ms. Allocated memory was 247.5MB in the beginning and 429.9MB in the end (delta: 182.5MB). Free memory was 181.3MB in the beginning and 192.0MB in the end (delta: -10.7MB). Peak memory consumption was 222.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 48.8s, OverallIterations: 10, TraceHistogramMax: 11, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 11.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 19.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 172 SdHoareTripleChecker+Valid, 7.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 127 mSDsluCounter, 1077 SdHoareTripleChecker+Invalid, 7.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 789 mSDsCounter, 144 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1640 IncrementalHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 144 mSolverCounterUnsat, 288 mSDtfsCounter, 1640 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1003 GetRequests, 797 SyntacticMatches, 9 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=8, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 21 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 55 PreInvPairs, 89 NumberOfFragments, 363 HoareAnnotationTreeSize, 55 FomulaSimplifications, 1332 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 18 FomulaSimplificationsInter, 4974 FormulaSimplificationTreeSizeReductionInter, 19.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 9.9s InterpolantComputationTime, 414 NumberOfCodeBlocks, 394 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 695 ConstructedInterpolants, 0 QuantifiedInterpolants, 6509 SizeOfPredicates, 53 NumberOfNonLiveVariables, 1141 ConjunctsInSsa, 221 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 846/958 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((b == q * x + y * s && 1 <= x) && a == y * r + p * x) && x <= 5) && 1 <= y) && p * s == q * r + 1 RESULT: Ultimate proved your program to be correct! [2023-03-31 23:16:41,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...