/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:03:05,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:03:05,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:03:05,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:03:05,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:03:05,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:03:05,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:03:05,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:03:05,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:03:05,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:03:05,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:03:05,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:03:05,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:03:05,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:03:05,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:03:05,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:03:05,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:03:05,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:03:05,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:03:05,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:03:05,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:03:05,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:03:05,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:03:05,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:03:05,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:03:05,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:03:05,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:03:05,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:03:05,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:03:05,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:03:05,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:03:05,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:03:05,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:03:05,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:03:05,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:03:05,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:03:05,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:03:05,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:03:05,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:03:05,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:03:05,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:03:05,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:03:05,867 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:03:05,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:03:05,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:03:05,868 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:03:05,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:03:05,868 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:03:05,869 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:03:05,869 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:03:05,869 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:03:05,869 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:03:05,870 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:03:05,870 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:03:05,870 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:03:05,870 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:03:05,870 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:03:05,870 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:03:05,871 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:03:05,871 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:03:05,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:03:05,871 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:03:05,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:03:05,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:03:05,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:03:05,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:03:05,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:03:05,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:03:05,872 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:03:05,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:03:05,873 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:03:05,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:03:05,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:03:05,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:03:05,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:03:05,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:03:05,873 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:03:05,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:03:05,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:03:05,874 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:03:05,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:03:05,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:03:05,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:03:05,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:03:06,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:03:06,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:03:06,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:03:06,133 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:03:06,134 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:03:06,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2023-04-01 05:03:07,294 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:03:07,473 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:03:07,474 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2023-04-01 05:03:07,480 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66fc1914a/e6e46ca9cd16476586209d9cbee67f73/FLAG611131120 [2023-04-01 05:03:07,492 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66fc1914a/e6e46ca9cd16476586209d9cbee67f73 [2023-04-01 05:03:07,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:03:07,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:03:07,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:03:07,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:03:07,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:03:07,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:03:07" (1/1) ... [2023-04-01 05:03:07,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e8644d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:07, skipping insertion in model container [2023-04-01 05:03:07,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:03:07" (1/1) ... [2023-04-01 05:03:07,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:03:07,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:03:07,705 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/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2023-04-01 05:03:07,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:03:07,728 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:03:07,741 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/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2023-04-01 05:03:07,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:03:07,757 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:03:07,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:07 WrapperNode [2023-04-01 05:03:07,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:03:07,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:03:07,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:03:07,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:03:07,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:07" (1/1) ... [2023-04-01 05:03:07,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:07" (1/1) ... [2023-04-01 05:03:07,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:07" (1/1) ... [2023-04-01 05:03:07,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:07" (1/1) ... [2023-04-01 05:03:07,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:07" (1/1) ... [2023-04-01 05:03:07,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:07" (1/1) ... [2023-04-01 05:03:07,797 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:07" (1/1) ... [2023-04-01 05:03:07,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:07" (1/1) ... [2023-04-01 05:03:07,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:03:07,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:03:07,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:03:07,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:03:07,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:07" (1/1) ... [2023-04-01 05:03:07,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:03:07,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:03:07,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:03:07,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:03:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:03:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:03:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:03:07,875 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:03:07,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:03:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:03:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:03:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:03:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:03:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:03:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:03:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:03:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:03:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:03:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:03:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:03:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:03:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:03:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:03:07,931 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:03:07,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:03:08,185 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:03:08,264 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:03:08,264 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 05:03:08,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:03:08 BoogieIcfgContainer [2023-04-01 05:03:08,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:03:08,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:03:08,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:03:08,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:03:08,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:03:07" (1/3) ... [2023-04-01 05:03:08,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a833bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:03:08, skipping insertion in model container [2023-04-01 05:03:08,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:07" (2/3) ... [2023-04-01 05:03:08,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a833bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:03:08, skipping insertion in model container [2023-04-01 05:03:08,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:03:08" (3/3) ... [2023-04-01 05:03:08,274 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2023-04-01 05:03:08,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:03:08,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:03:08,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:03:08,330 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;@2d5590d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:03:08,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:03:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 05:03:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 05:03:08,340 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:03:08,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:03:08,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:03:08,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:03:08,346 INFO L85 PathProgramCache]: Analyzing trace with hash -164184841, now seen corresponding path program 1 times [2023-04-01 05:03:08,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:03:08,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900026578] [2023-04-01 05:03:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:08,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:03:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:09,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:03:09,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900026578] [2023-04-01 05:03:09,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900026578] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:03:09,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:03:09,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 05:03:09,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070301501] [2023-04-01 05:03:09,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:03:09,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:03:09,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:03:09,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:03:09,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:03:09,219 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:03:09,313 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2023-04-01 05:03:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 05:03:09,316 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-01 05:03:09,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:03:09,322 INFO L225 Difference]: With dead ends: 30 [2023-04-01 05:03:09,322 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 05:03:09,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:03:09,331 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:03:09,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:03:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 05:03:09,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 05:03:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2023-04-01 05:03:09,362 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2023-04-01 05:03:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:03:09,362 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2023-04-01 05:03:09,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2023-04-01 05:03:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 05:03:09,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:03:09,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:03:09,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:03:09,364 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:03:09,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:03:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash -793097305, now seen corresponding path program 1 times [2023-04-01 05:03:09,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:03:09,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363870098] [2023-04-01 05:03:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:09,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:03:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:09,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:03:09,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363870098] [2023-04-01 05:03:09,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363870098] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:03:09,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466255204] [2023-04-01 05:03:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:09,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:09,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:03:09,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:03:09,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:03:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:09,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 05:03:09,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:03:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:09,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:03:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:10,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466255204] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:03:10,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [492516553] [2023-04-01 05:03:10,397 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 05:03:10,397 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:03:10,401 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:03:10,405 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:03:10,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:03:10,489 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 15 for LOIs [2023-04-01 05:03:10,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 05:03:10,650 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:03:11,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '244#(and (= ~__return_720~0 0) (<= 1 |#StackHeapBarrier|) (<= 100 main_~main__x~0) (not (= 100 main_~main__y~0)) (= |old(~__return_720~0)| 0) (= main_~__VERIFIER_assert__cond~0 0) (= main_~__tmp_1~0 0) (= |#NULL.offset| 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:03:11,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:03:11,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:03:11,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 05:03:11,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362241290] [2023-04-01 05:03:11,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:03:11,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 05:03:11,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:03:11,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 05:03:11,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 05:03:11,092 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:03:11,154 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2023-04-01 05:03:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 05:03:11,155 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 05:03:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:03:11,156 INFO L225 Difference]: With dead ends: 34 [2023-04-01 05:03:11,156 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 05:03:11,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 05:03:11,158 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:03:11,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:03:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 05:03:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 05:03:11,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2023-04-01 05:03:11,163 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 18 [2023-04-01 05:03:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:03:11,164 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2023-04-01 05:03:11,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:11,164 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2023-04-01 05:03:11,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 05:03:11,164 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:03:11,165 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:03:11,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 05:03:11,370 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 [2023-04-01 05:03:11,371 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:03:11,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:03:11,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1700415399, now seen corresponding path program 2 times [2023-04-01 05:03:11,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:03:11,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665745133] [2023-04-01 05:03:11,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:11,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:03:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:12,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:03:12,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665745133] [2023-04-01 05:03:12,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665745133] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:03:12,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142701583] [2023-04-01 05:03:12,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:03:12,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:12,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:03:12,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:03:12,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:03:12,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-01 05:03:12,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:03:12,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 05:03:12,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:03:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:12,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:03:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:13,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142701583] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:03:13,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1136669282] [2023-04-01 05:03:13,523 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 05:03:13,524 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:03:13,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:03:13,524 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:03:13,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:03:13,556 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 15 for LOIs [2023-04-01 05:03:13,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 05:03:13,681 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:03:14,090 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '602#(and (= ~__return_720~0 0) (<= 1 |#StackHeapBarrier|) (<= 100 main_~main__x~0) (not (= 100 main_~main__y~0)) (= |old(~__return_720~0)| 0) (= main_~__VERIFIER_assert__cond~0 0) (= main_~__tmp_1~0 0) (= |#NULL.offset| 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:03:14,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:03:14,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:03:14,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-01 05:03:14,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401334379] [2023-04-01 05:03:14,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:03:14,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 05:03:14,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:03:14,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 05:03:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1610, Invalid=2422, Unknown=0, NotChecked=0, Total=4032 [2023-04-01 05:03:14,095 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:14,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:03:14,197 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2023-04-01 05:03:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 05:03:14,198 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-04-01 05:03:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:03:14,199 INFO L225 Difference]: With dead ends: 58 [2023-04-01 05:03:14,199 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 05:03:14,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1610, Invalid=2422, Unknown=0, NotChecked=0, Total=4032 [2023-04-01 05:03:14,201 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:03:14,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:03:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 05:03:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-04-01 05:03:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2023-04-01 05:03:14,217 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 30 [2023-04-01 05:03:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:03:14,218 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2023-04-01 05:03:14,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2023-04-01 05:03:14,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 05:03:14,223 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:03:14,223 INFO L195 NwaCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:03:14,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 05:03:14,429 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 [2023-04-01 05:03:14,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:03:14,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:03:14,430 INFO L85 PathProgramCache]: Analyzing trace with hash -246661209, now seen corresponding path program 3 times [2023-04-01 05:03:14,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:03:14,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596519587] [2023-04-01 05:03:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:14,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:03:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:17,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:03:17,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596519587] [2023-04-01 05:03:17,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596519587] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:03:17,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546926181] [2023-04-01 05:03:17,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:03:17,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:17,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:03:17,108 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:03:17,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:03:17,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:03:17,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:03:17,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 05:03:17,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:03:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:17,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:03:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:20,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546926181] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:03:20,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [873508288] [2023-04-01 05:03:20,280 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 05:03:20,280 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:03:20,280 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:03:20,281 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:03:20,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:03:20,307 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 15 for LOIs [2023-04-01 05:03:20,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 05:03:20,388 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:03:20,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1248#(and (= ~__return_720~0 0) (<= 1 |#StackHeapBarrier|) (<= 100 main_~main__x~0) (not (= 100 main_~main__y~0)) (= |old(~__return_720~0)| 0) (= main_~__VERIFIER_assert__cond~0 0) (= main_~__tmp_1~0 0) (= |#NULL.offset| 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:03:20,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:03:20,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:03:20,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-04-01 05:03:20,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681741931] [2023-04-01 05:03:20,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:03:20,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-04-01 05:03:20,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:03:20,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-04-01 05:03:20,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5522, Invalid=6910, Unknown=0, NotChecked=0, Total=12432 [2023-04-01 05:03:20,823 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:03:21,011 INFO L93 Difference]: Finished difference Result 106 states and 153 transitions. [2023-04-01 05:03:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-04-01 05:03:21,012 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-01 05:03:21,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:03:21,013 INFO L225 Difference]: With dead ends: 106 [2023-04-01 05:03:21,013 INFO L226 Difference]: Without dead ends: 103 [2023-04-01 05:03:21,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2750 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5522, Invalid=6910, Unknown=0, NotChecked=0, Total=12432 [2023-04-01 05:03:21,018 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:03:21,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:03:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-04-01 05:03:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-04-01 05:03:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2023-04-01 05:03:21,028 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 54 [2023-04-01 05:03:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:03:21,029 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2023-04-01 05:03:21,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2023-04-01 05:03:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-01 05:03:21,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:03:21,030 INFO L195 NwaCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:03:21,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 05:03:21,239 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 [2023-04-01 05:03:21,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:03:21,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:03:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1745342553, now seen corresponding path program 4 times [2023-04-01 05:03:21,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:03:21,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978004908] [2023-04-01 05:03:21,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:21,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:03:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:30,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:03:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978004908] [2023-04-01 05:03:30,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978004908] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:03:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992709486] [2023-04-01 05:03:30,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:03:30,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:30,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:03:30,222 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:03:30,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 05:03:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:30,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-01 05:03:30,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:03:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:39,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:03:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:40,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992709486] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:03:40,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [430539505] [2023-04-01 05:03:40,711 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 05:03:40,712 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:03:40,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:03:40,712 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:03:40,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:03:40,731 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 15 for LOIs [2023-04-01 05:03:40,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 05:03:40,789 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:03:42,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2473#(and (= ~__return_720~0 0) (<= 1 |#StackHeapBarrier|) (<= 100 main_~main__x~0) (not (= 100 main_~main__y~0)) (= |old(~__return_720~0)| 0) (= main_~__VERIFIER_assert__cond~0 0) (= main_~__tmp_1~0 0) (= |#NULL.offset| 0) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:03:42,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:03:42,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:03:42,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 196 [2023-04-01 05:03:42,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42600875] [2023-04-01 05:03:42,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:03:42,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2023-04-01 05:03:42,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:03:42,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2023-04-01 05:03:42,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11296, Invalid=33014, Unknown=0, NotChecked=0, Total=44310 [2023-04-01 05:03:42,321 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 196 states, 196 states have (on average 1.0714285714285714) internal successors, (210), 196 states have internal predecessors, (210), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:03:44,196 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2023-04-01 05:03:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-04-01 05:03:44,196 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 1.0714285714285714) internal successors, (210), 196 states have internal predecessors, (210), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2023-04-01 05:03:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:03:44,197 INFO L225 Difference]: With dead ends: 112 [2023-04-01 05:03:44,197 INFO L226 Difference]: Without dead ends: 109 [2023-04-01 05:03:44,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4149 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=11296, Invalid=33014, Unknown=0, NotChecked=0, Total=44310 [2023-04-01 05:03:44,202 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5188 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 5188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 05:03:44,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 5188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5188 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 05:03:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-01 05:03:44,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-04-01 05:03:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2023-04-01 05:03:44,211 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 102 [2023-04-01 05:03:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:03:44,211 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2023-04-01 05:03:44,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 1.0714285714285714) internal successors, (210), 196 states have internal predecessors, (210), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:03:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2023-04-01 05:03:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 05:03:44,213 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:03:44,213 INFO L195 NwaCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:03:44,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 05:03:44,417 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 [2023-04-01 05:03:44,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:03:44,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:03:44,417 INFO L85 PathProgramCache]: Analyzing trace with hash 725642663, now seen corresponding path program 5 times [2023-04-01 05:03:44,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:03:44,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032329115] [2023-04-01 05:03:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:44,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:03:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:55,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:03:55,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032329115] [2023-04-01 05:03:55,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032329115] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:03:55,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043506368] [2023-04-01 05:03:55,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:03:55,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:55,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:03:55,875 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:03:55,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 05:03:56,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2023-04-01 05:03:56,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:03:56,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 111 conjunts are in the unsatisfiable core [2023-04-01 05:03:56,030 INFO L285 TraceCheckSpWp]: Computing forward predicates...