/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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:56:08,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:56:08,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:56:08,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:56:08,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:56:08,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:56:08,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:56:08,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:56:08,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:56:08,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:56:08,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:56:08,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:56:08,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:56:08,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:56:08,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:56:08,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:56:08,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:56:08,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:56:08,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:56:08,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:56:08,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:56:08,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:56:08,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:56:08,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:56:08,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:56:08,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:56:08,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:56:08,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:56:08,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:56:08,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:56:08,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:56:08,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:56:08,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:56:08,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:56:08,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:56:08,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:56:08,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:56:08,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:56:08,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:56:08,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:56:08,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:56:08,955 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 [2023-04-03 02:56:08,988 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:56:08,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:56:08,988 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:56:08,988 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:56:08,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:56:08,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:56:08,990 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:56:08,990 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:56:08,990 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:56:08,990 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:56:08,991 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:56:08,991 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:56:08,991 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:56:08,991 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:56:08,991 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:56:08,991 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:56:08,991 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:56:08,992 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:56:08,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:56:08,993 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:56:08,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:56:08,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:56:08,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:56:08,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:56:08,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:56:08,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:56:08,994 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:56:08,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:56:08,994 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:56:08,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:56:08,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:56:08,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:56:08,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:56:08,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:56:08,995 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:56:08,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:56:08,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:56:08,995 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:56:08,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:56:08,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:56:08,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:56:08,996 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:56:09,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:56:09,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:56:09,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:56:09,269 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:56:09,270 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:56:09,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:56:10,468 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:56:10,716 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:56:10,717 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:56:10,726 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0886009d/15adba0ea51a45cea7da9bdce627ccf8/FLAGe9b264bca [2023-04-03 02:56:10,742 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0886009d/15adba0ea51a45cea7da9bdce627ccf8 [2023-04-03 02:56:10,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:56:10,748 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:56:10,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:56:10,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:56:10,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:56:10,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:56:10" (1/1) ... [2023-04-03 02:56:10,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53c07752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:10, skipping insertion in model container [2023-04-03 02:56:10,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:56:10" (1/1) ... [2023-04-03 02:56:10,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:56:10,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:56:10,941 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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4107,4120] [2023-04-03 02:56:10,956 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:56:10,968 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:56:10,999 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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4107,4120] [2023-04-03 02:56:11,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:56:11,031 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:56:11,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:11 WrapperNode [2023-04-03 02:56:11,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:56:11,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:56:11,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:56:11,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:56:11,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:11" (1/1) ... [2023-04-03 02:56:11,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:11" (1/1) ... [2023-04-03 02:56:11,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:11" (1/1) ... [2023-04-03 02:56:11,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:11" (1/1) ... [2023-04-03 02:56:11,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:11" (1/1) ... [2023-04-03 02:56:11,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:11" (1/1) ... [2023-04-03 02:56:11,062 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:11" (1/1) ... [2023-04-03 02:56:11,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:11" (1/1) ... [2023-04-03 02:56:11,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:56:11,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:56:11,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:56:11,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:56:11,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:11" (1/1) ... [2023-04-03 02:56:11,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:56:11,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:56:11,102 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) [2023-04-03 02:56:11,113 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 [2023-04-03 02:56:11,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:56:11,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:56:11,137 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:56:11,137 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:56:11,137 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:56:11,138 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:56:11,138 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:56:11,138 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:56:11,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:56:11,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:56:11,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:56:11,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:56:11,138 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:56:11,139 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:56:11,139 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:56:11,139 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:56:11,139 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:56:11,139 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:56:11,139 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:56:11,139 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:56:11,139 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:56:11,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:56:11,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:56:11,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:56:11,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:56:11,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:56:11,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:56:11,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:56:11,247 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:56:11,249 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:56:11,575 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:56:11,685 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:56:11,686 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:56:11,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:56:11 BoogieIcfgContainer [2023-04-03 02:56:11,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:56:11,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:56:11,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:56:11,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:56:11,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:56:10" (1/3) ... [2023-04-03 02:56:11,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c09e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:56:11, skipping insertion in model container [2023-04-03 02:56:11,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:56:11" (2/3) ... [2023-04-03 02:56:11,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c09e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:56:11, skipping insertion in model container [2023-04-03 02:56:11,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:56:11" (3/3) ... [2023-04-03 02:56:11,698 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:56:11,715 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:56:11,715 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:56:11,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:56:11,786 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;@41748e47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:56:11,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:56:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 49 states have internal predecessors, (79), 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) [2023-04-03 02:56:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-03 02:56:11,798 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:11,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:11,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:11,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash 969623482, now seen corresponding path program 1 times [2023-04-03 02:56:11,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:11,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999693380] [2023-04-03 02:56:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:11,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:12,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:12,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999693380] [2023-04-03 02:56:12,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999693380] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:12,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:12,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:56:12,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601445793] [2023-04-03 02:56:12,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:12,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:56:12,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:12,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:56:12,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:12,229 INFO L87 Difference]: Start difference. First operand has 54 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 49 states have internal predecessors, (79), 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 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-04-03 02:56:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:12,291 INFO L93 Difference]: Finished difference Result 114 states and 165 transitions. [2023-04-03 02:56:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:56:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2023-04-03 02:56:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:12,300 INFO L225 Difference]: With dead ends: 114 [2023-04-03 02:56:12,300 INFO L226 Difference]: Without dead ends: 72 [2023-04-03 02:56:12,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:12,307 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 54 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:12,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 148 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-03 02:56:12,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-04-03 02:56:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 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) [2023-04-03 02:56:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2023-04-03 02:56:12,360 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 33 [2023-04-03 02:56:12,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:12,361 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2023-04-03 02:56:12,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-04-03 02:56:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2023-04-03 02:56:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-03 02:56:12,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:12,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:12,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:56:12,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:12,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:12,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1174706885, now seen corresponding path program 1 times [2023-04-03 02:56:12,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:12,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209408962] [2023-04-03 02:56:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:12,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:12,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:12,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209408962] [2023-04-03 02:56:12,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209408962] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:12,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:12,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:56:12,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302999727] [2023-04-03 02:56:12,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:12,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:56:12,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:12,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:56:12,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:12,541 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2023-04-03 02:56:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:12,613 INFO L93 Difference]: Finished difference Result 158 states and 220 transitions. [2023-04-03 02:56:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:56:12,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 36 [2023-04-03 02:56:12,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:12,619 INFO L225 Difference]: With dead ends: 158 [2023-04-03 02:56:12,619 INFO L226 Difference]: Without dead ends: 110 [2023-04-03 02:56:12,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:12,624 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 33 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:12,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 114 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-03 02:56:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2023-04-03 02:56:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.3846153846153846) internal successors, (144), 104 states have internal predecessors, (144), 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) [2023-04-03 02:56:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 147 transitions. [2023-04-03 02:56:12,647 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 147 transitions. Word has length 36 [2023-04-03 02:56:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:12,648 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 147 transitions. [2023-04-03 02:56:12,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2023-04-03 02:56:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 147 transitions. [2023-04-03 02:56:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-03 02:56:12,649 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:12,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:12,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:56:12,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:12,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1942664208, now seen corresponding path program 1 times [2023-04-03 02:56:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:12,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792176359] [2023-04-03 02:56:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:12,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:12,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792176359] [2023-04-03 02:56:12,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792176359] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:12,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:12,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:56:12,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892517160] [2023-04-03 02:56:12,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:12,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:56:12,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:12,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:56:12,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:12,753 INFO L87 Difference]: Start difference. First operand 108 states and 147 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2023-04-03 02:56:12,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:12,842 INFO L93 Difference]: Finished difference Result 264 states and 373 transitions. [2023-04-03 02:56:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:56:12,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 39 [2023-04-03 02:56:12,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:12,849 INFO L225 Difference]: With dead ends: 264 [2023-04-03 02:56:12,850 INFO L226 Difference]: Without dead ends: 178 [2023-04-03 02:56:12,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:12,856 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 28 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:12,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 110 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-04-03 02:56:12,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2023-04-03 02:56:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.3953488372093024) internal successors, (240), 172 states have internal predecessors, (240), 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) [2023-04-03 02:56:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 243 transitions. [2023-04-03 02:56:12,915 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 243 transitions. Word has length 39 [2023-04-03 02:56:12,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:12,916 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 243 transitions. [2023-04-03 02:56:12,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2023-04-03 02:56:12,917 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 243 transitions. [2023-04-03 02:56:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-03 02:56:12,934 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:12,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:12,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:56:12,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:12,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:12,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1663555133, now seen corresponding path program 1 times [2023-04-03 02:56:12,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:12,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754625207] [2023-04-03 02:56:12,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:12,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:13,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:13,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754625207] [2023-04-03 02:56:13,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754625207] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:13,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:13,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:56:13,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414596423] [2023-04-03 02:56:13,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:13,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:56:13,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:13,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:56:13,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:56:13,099 INFO L87 Difference]: Start difference. First operand 176 states and 243 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2023-04-03 02:56:13,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:13,279 INFO L93 Difference]: Finished difference Result 668 states and 942 transitions. [2023-04-03 02:56:13,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:56:13,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 42 [2023-04-03 02:56:13,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:13,283 INFO L225 Difference]: With dead ends: 668 [2023-04-03 02:56:13,283 INFO L226 Difference]: Without dead ends: 514 [2023-04-03 02:56:13,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:56:13,293 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 203 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:13,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 360 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:56:13,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-04-03 02:56:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 260. [2023-04-03 02:56:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 256 states have (on average 1.38671875) internal successors, (355), 256 states have internal predecessors, (355), 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) [2023-04-03 02:56:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 358 transitions. [2023-04-03 02:56:13,364 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 358 transitions. Word has length 42 [2023-04-03 02:56:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:13,366 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 358 transitions. [2023-04-03 02:56:13,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2023-04-03 02:56:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 358 transitions. [2023-04-03 02:56:13,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-03 02:56:13,367 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:13,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:13,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:56:13,368 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:13,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash 55455000, now seen corresponding path program 1 times [2023-04-03 02:56:13,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:13,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102333336] [2023-04-03 02:56:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:13,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:13,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:13,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102333336] [2023-04-03 02:56:13,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102333336] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:13,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:13,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:56:13,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971546894] [2023-04-03 02:56:13,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:13,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:56:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:13,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:56:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:13,471 INFO L87 Difference]: Start difference. First operand 260 states and 358 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-04-03 02:56:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:13,563 INFO L93 Difference]: Finished difference Result 646 states and 908 transitions. [2023-04-03 02:56:13,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:56:13,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 44 [2023-04-03 02:56:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:13,586 INFO L225 Difference]: With dead ends: 646 [2023-04-03 02:56:13,587 INFO L226 Difference]: Without dead ends: 408 [2023-04-03 02:56:13,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:13,589 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 22 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:13,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 90 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:13,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-04-03 02:56:13,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2023-04-03 02:56:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 402 states have (on average 1.400497512437811) internal successors, (563), 402 states have internal predecessors, (563), 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) [2023-04-03 02:56:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 566 transitions. [2023-04-03 02:56:13,674 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 566 transitions. Word has length 44 [2023-04-03 02:56:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:13,674 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 566 transitions. [2023-04-03 02:56:13,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-04-03 02:56:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 566 transitions. [2023-04-03 02:56:13,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-03 02:56:13,679 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:13,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:13,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:56:13,680 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:13,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:13,681 INFO L85 PathProgramCache]: Analyzing trace with hash 75504343, now seen corresponding path program 1 times [2023-04-03 02:56:13,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:13,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685024752] [2023-04-03 02:56:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:13,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:13,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:13,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685024752] [2023-04-03 02:56:13,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685024752] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:13,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:13,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:56:13,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848356712] [2023-04-03 02:56:13,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:13,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:56:13,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:13,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:56:13,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:56:13,902 INFO L87 Difference]: Start difference. First operand 406 states and 566 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2023-04-03 02:56:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:14,030 INFO L93 Difference]: Finished difference Result 790 states and 1109 transitions. [2023-04-03 02:56:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:56:14,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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 44 [2023-04-03 02:56:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:14,035 INFO L225 Difference]: With dead ends: 790 [2023-04-03 02:56:14,036 INFO L226 Difference]: Without dead ends: 408 [2023-04-03 02:56:14,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:56:14,037 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 22 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:14,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-04-03 02:56:14,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2023-04-03 02:56:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 402 states have (on average 1.3955223880597014) internal successors, (561), 402 states have internal predecessors, (561), 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) [2023-04-03 02:56:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 564 transitions. [2023-04-03 02:56:14,106 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 564 transitions. Word has length 44 [2023-04-03 02:56:14,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:14,106 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 564 transitions. [2023-04-03 02:56:14,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 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) [2023-04-03 02:56:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 564 transitions. [2023-04-03 02:56:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 02:56:14,108 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:14,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:14,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:56:14,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:14,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:14,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1956242078, now seen corresponding path program 1 times [2023-04-03 02:56:14,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:14,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646341512] [2023-04-03 02:56:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:14,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:14,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:14,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646341512] [2023-04-03 02:56:14,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646341512] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:14,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:14,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:56:14,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034806409] [2023-04-03 02:56:14,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:14,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:56:14,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:14,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:56:14,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:56:14,208 INFO L87 Difference]: Start difference. First operand 406 states and 564 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) [2023-04-03 02:56:14,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:14,359 INFO L93 Difference]: Finished difference Result 788 states and 1104 transitions. [2023-04-03 02:56:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:56:14,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) Word has length 45 [2023-04-03 02:56:14,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:14,362 INFO L225 Difference]: With dead ends: 788 [2023-04-03 02:56:14,362 INFO L226 Difference]: Without dead ends: 406 [2023-04-03 02:56:14,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:56:14,364 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 115 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:14,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 60 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:14,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-04-03 02:56:14,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2023-04-03 02:56:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 402 states have (on average 1.3756218905472637) internal successors, (553), 402 states have internal predecessors, (553), 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) [2023-04-03 02:56:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 556 transitions. [2023-04-03 02:56:14,448 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 556 transitions. Word has length 45 [2023-04-03 02:56:14,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:14,448 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 556 transitions. [2023-04-03 02:56:14,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) [2023-04-03 02:56:14,448 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 556 transitions. [2023-04-03 02:56:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 02:56:14,450 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:14,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:14,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:56:14,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:14,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:14,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1809434717, now seen corresponding path program 1 times [2023-04-03 02:56:14,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:14,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863420160] [2023-04-03 02:56:14,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:14,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:14,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:14,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863420160] [2023-04-03 02:56:14,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863420160] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:14,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:14,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:56:14,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255851039] [2023-04-03 02:56:14,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:14,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:56:14,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:14,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:56:14,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:56:14,582 INFO L87 Difference]: Start difference. First operand 406 states and 556 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) [2023-04-03 02:56:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:14,735 INFO L93 Difference]: Finished difference Result 790 states and 1089 transitions. [2023-04-03 02:56:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:56:14,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) Word has length 45 [2023-04-03 02:56:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:14,738 INFO L225 Difference]: With dead ends: 790 [2023-04-03 02:56:14,738 INFO L226 Difference]: Without dead ends: 408 [2023-04-03 02:56:14,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:56:14,740 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 203 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:14,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 66 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:56:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-04-03 02:56:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2023-04-03 02:56:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 402 states have (on average 1.355721393034826) internal successors, (545), 402 states have internal predecessors, (545), 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) [2023-04-03 02:56:14,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 548 transitions. [2023-04-03 02:56:14,820 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 548 transitions. Word has length 45 [2023-04-03 02:56:14,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:14,820 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 548 transitions. [2023-04-03 02:56:14,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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) [2023-04-03 02:56:14,820 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 548 transitions. [2023-04-03 02:56:14,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 02:56:14,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:14,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:14,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:56:14,821 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:14,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:14,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1937520024, now seen corresponding path program 1 times [2023-04-03 02:56:14,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:14,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821469399] [2023-04-03 02:56:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:14,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:15,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:15,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821469399] [2023-04-03 02:56:15,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821469399] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:15,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:15,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:56:15,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084183726] [2023-04-03 02:56:15,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:15,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:56:15,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:15,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:56:15,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:56:15,019 INFO L87 Difference]: Start difference. First operand 406 states and 548 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2023-04-03 02:56:15,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:15,194 INFO L93 Difference]: Finished difference Result 643 states and 860 transitions. [2023-04-03 02:56:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:56:15,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 45 [2023-04-03 02:56:15,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:15,198 INFO L225 Difference]: With dead ends: 643 [2023-04-03 02:56:15,198 INFO L226 Difference]: Without dead ends: 641 [2023-04-03 02:56:15,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:56:15,200 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 63 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:15,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 267 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2023-04-03 02:56:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 422. [2023-04-03 02:56:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 418 states have (on average 1.313397129186603) internal successors, (549), 418 states have internal predecessors, (549), 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) [2023-04-03 02:56:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 552 transitions. [2023-04-03 02:56:15,294 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 552 transitions. Word has length 45 [2023-04-03 02:56:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:15,295 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 552 transitions. [2023-04-03 02:56:15,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2023-04-03 02:56:15,295 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 552 transitions. [2023-04-03 02:56:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:56:15,296 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:15,296 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:56:15,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:56:15,296 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:15,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:15,296 INFO L85 PathProgramCache]: Analyzing trace with hash 237357238, now seen corresponding path program 1 times [2023-04-03 02:56:15,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:15,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884292174] [2023-04-03 02:56:15,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:15,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:19,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:19,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884292174] [2023-04-03 02:56:19,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884292174] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:56:19,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862574383] [2023-04-03 02:56:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:19,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:56:19,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:56:19,737 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) [2023-04-03 02:56:19,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:56:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:19,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-03 02:56:19,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:56:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:24,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:57:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:57:11,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862574383] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:57:11,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [438324017] [2023-04-03 02:57:11,675 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2023-04-03 02:57:11,675 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:57:11,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:57:11,684 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:57:11,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:57:12,099 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 104 for LOIs [2023-04-03 02:57:21,518 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 02:57:21,934 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 20736 conjuctions. This might take some time...