/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:46:41,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:46:41,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:46:41,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:46:41,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:46:41,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:46:41,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:46:41,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:46:41,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:46:41,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:46:41,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:46:41,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:46:41,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:46:41,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:46:41,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:46:41,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:46:41,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:46:41,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:46:41,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:46:41,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:46:41,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:46:41,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:46:41,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:46:41,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:46:41,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:46:41,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:46:41,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:46:41,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:46:41,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:46:41,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:46:41,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:46:41,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:46:41,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:46:41,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:46:41,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:46:41,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:46:41,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:46:41,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:46:41,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:46:41,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:46:41,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:46:41,926 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:46:41,948 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:46:41,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:46:41,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:46:41,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:46:41,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:46:41,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:46:41,949 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:46:41,949 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:46:41,949 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:46:41,950 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:46:41,950 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:46:41,950 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:46:41,950 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:46:41,950 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:46:41,951 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:46:41,951 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:46:41,951 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:46:41,951 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:46:41,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:46:41,952 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:46:41,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:46:41,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:46:41,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:46:41,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:46:41,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:46:41,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:46:41,952 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:46:41,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:46:41,952 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:46:41,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:46:41,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:46:41,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:46:41,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:46:41,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:46:41,953 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:46:41,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:46:41,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:46:41,953 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:46:41,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:46:41,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:46:41,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:46:41,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:46:42,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:46:42,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:46:42,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:46:42,200 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:46:42,201 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:46:42,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:46:43,218 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:46:43,515 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:46:43,515 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:46:43,525 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c8dc7391/7623f1b47cfd41ce81042225a23cf950/FLAG8670ab9d5 [2023-04-01 12:46:43,544 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c8dc7391/7623f1b47cfd41ce81042225a23cf950 [2023-04-01 12:46:43,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:46:43,546 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:46:43,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:46:43,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:46:43,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:46:43,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:46:43" (1/1) ... [2023-04-01 12:46:43,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d3db55d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:46:43, skipping insertion in model container [2023-04-01 12:46:43,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:46:43" (1/1) ... [2023-04-01 12:46:43,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:46:43,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:46:43,754 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.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6732,6745] [2023-04-01 12:46:43,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:46:43,798 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:46:43,846 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.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6732,6745] [2023-04-01 12:46:43,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:46:43,881 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:46:43,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:46:43 WrapperNode [2023-04-01 12:46:43,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:46:43,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:46:43,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:46:43,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:46:43,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:46:43" (1/1) ... [2023-04-01 12:46:43,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:46:43" (1/1) ... [2023-04-01 12:46:43,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:46:43" (1/1) ... [2023-04-01 12:46:43,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:46:43" (1/1) ... [2023-04-01 12:46:43,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:46:43" (1/1) ... [2023-04-01 12:46:43,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:46:43" (1/1) ... [2023-04-01 12:46:43,923 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:46:43" (1/1) ... [2023-04-01 12:46:43,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:46:43" (1/1) ... [2023-04-01 12:46:43,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:46:43,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:46:43,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:46:43,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:46:43,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:46:43" (1/1) ... [2023-04-01 12:46:43,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:46:43,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:46:43,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:46:43,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:46:43,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:46:43,991 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:46:43,991 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:46:43,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:46:43,991 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:46:43,991 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:46:43,991 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:46:43,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:46:43,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:46:43,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:46:43,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:46:43,992 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:46:43,992 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:46:43,992 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:46:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:46:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:46:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:46:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:46:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:46:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 12:46:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-01 12:46:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:46:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:46:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:46:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:46:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:46:43,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:46:43,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:46:43,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:46:43,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:46:43,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:46:44,140 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:46:44,142 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:46:44,442 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:46:44,530 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:46:44,531 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:46:44,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:46:44 BoogieIcfgContainer [2023-04-01 12:46:44,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:46:44,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:46:44,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:46:44,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:46:44,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:46:43" (1/3) ... [2023-04-01 12:46:44,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f045534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:46:44, skipping insertion in model container [2023-04-01 12:46:44,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:46:43" (2/3) ... [2023-04-01 12:46:44,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f045534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:46:44, skipping insertion in model container [2023-04-01 12:46:44,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:46:44" (3/3) ... [2023-04-01 12:46:44,538 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:46:44,548 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:46:44,549 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:46:44,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:46:44,582 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;@109d08ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:46:44,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:46:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 89 states have (on average 1.7303370786516854) internal successors, (154), 91 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:46:44,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 12:46:44,591 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:44,591 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:46:44,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:44,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:44,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1121163923, now seen corresponding path program 1 times [2023-04-01 12:46:44,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:44,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327023792] [2023-04-01 12:46:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:44,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:44,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:44,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327023792] [2023-04-01 12:46:44,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327023792] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:44,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:44,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:46:44,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343954112] [2023-04-01 12:46:44,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:44,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:46:44,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:45,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:46:45,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:46:45,008 INFO L87 Difference]: Start difference. First operand has 96 states, 89 states have (on average 1.7303370786516854) internal successors, (154), 91 states have internal predecessors, (154), 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 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:45,107 INFO L93 Difference]: Finished difference Result 192 states and 294 transitions. [2023-04-01 12:46:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:46:45,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 63 [2023-04-01 12:46:45,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:45,115 INFO L225 Difference]: With dead ends: 192 [2023-04-01 12:46:45,115 INFO L226 Difference]: Without dead ends: 132 [2023-04-01 12:46:45,117 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 [2023-04-01 12:46:45,119 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 105 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:45,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 268 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:46:45,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-01 12:46:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2023-04-01 12:46:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 1.3253968253968254) internal successors, (167), 126 states have internal predecessors, (167), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 170 transitions. [2023-04-01 12:46:45,176 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 170 transitions. Word has length 63 [2023-04-01 12:46:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:45,176 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 170 transitions. [2023-04-01 12:46:45,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 170 transitions. [2023-04-01 12:46:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 12:46:45,178 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:45,178 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:46:45,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:46:45,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:45,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:45,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1592593816, now seen corresponding path program 1 times [2023-04-01 12:46:45,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:45,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742725562] [2023-04-01 12:46:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:45,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:45,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742725562] [2023-04-01 12:46:45,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742725562] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:45,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:45,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:46:45,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783938987] [2023-04-01 12:46:45,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:45,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:46:45,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:45,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:46:45,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:46:45,341 INFO L87 Difference]: Start difference. First operand 130 states and 170 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:45,423 INFO L93 Difference]: Finished difference Result 290 states and 406 transitions. [2023-04-01 12:46:45,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:46:45,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 66 [2023-04-01 12:46:45,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:45,425 INFO L225 Difference]: With dead ends: 290 [2023-04-01 12:46:45,425 INFO L226 Difference]: Without dead ends: 206 [2023-04-01 12:46:45,426 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 [2023-04-01 12:46:45,427 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 60 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:45,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 210 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-04-01 12:46:45,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2023-04-01 12:46:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 200 states have (on average 1.38) internal successors, (276), 200 states have internal predecessors, (276), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 279 transitions. [2023-04-01 12:46:45,451 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 279 transitions. Word has length 66 [2023-04-01 12:46:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:45,451 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 279 transitions. [2023-04-01 12:46:45,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 279 transitions. [2023-04-01 12:46:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 12:46:45,453 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:45,453 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:46:45,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:46:45,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:45,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:45,453 INFO L85 PathProgramCache]: Analyzing trace with hash 789127290, now seen corresponding path program 1 times [2023-04-01 12:46:45,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:45,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889534604] [2023-04-01 12:46:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:45,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:45,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:45,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889534604] [2023-04-01 12:46:45,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889534604] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:45,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:45,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:46:45,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113926909] [2023-04-01 12:46:45,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:45,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:46:45,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:45,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:46:45,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:46:45,521 INFO L87 Difference]: Start difference. First operand 204 states and 279 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:45,603 INFO L93 Difference]: Finished difference Result 504 states and 721 transitions. [2023-04-01 12:46:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:46:45,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 69 [2023-04-01 12:46:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:45,609 INFO L225 Difference]: With dead ends: 504 [2023-04-01 12:46:45,609 INFO L226 Difference]: Without dead ends: 346 [2023-04-01 12:46:45,610 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 [2023-04-01 12:46:45,611 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 55 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:45,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 206 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-04-01 12:46:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2023-04-01 12:46:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 340 states have (on average 1.411764705882353) internal successors, (480), 340 states have internal predecessors, (480), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 483 transitions. [2023-04-01 12:46:45,672 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 483 transitions. Word has length 69 [2023-04-01 12:46:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:45,673 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 483 transitions. [2023-04-01 12:46:45,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 483 transitions. [2023-04-01 12:46:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 12:46:45,674 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:45,674 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, 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] [2023-04-01 12:46:45,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:46:45,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:45,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:45,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1227623603, now seen corresponding path program 1 times [2023-04-01 12:46:45,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:45,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038516287] [2023-04-01 12:46:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:45,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:45,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:45,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038516287] [2023-04-01 12:46:45,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038516287] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:45,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:45,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:46:45,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25445939] [2023-04-01 12:46:45,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:45,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:46:45,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:45,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:46:45,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:46:45,782 INFO L87 Difference]: Start difference. First operand 344 states and 483 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:45,873 INFO L93 Difference]: Finished difference Result 908 states and 1309 transitions. [2023-04-01 12:46:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:46:45,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 72 [2023-04-01 12:46:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:45,877 INFO L225 Difference]: With dead ends: 908 [2023-04-01 12:46:45,878 INFO L226 Difference]: Without dead ends: 610 [2023-04-01 12:46:45,881 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 [2023-04-01 12:46:45,889 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 50 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:45,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 202 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:45,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2023-04-01 12:46:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 608. [2023-04-01 12:46:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 604 states have (on average 1.423841059602649) internal successors, (860), 604 states have internal predecessors, (860), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 863 transitions. [2023-04-01 12:46:45,995 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 863 transitions. Word has length 72 [2023-04-01 12:46:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:45,996 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 863 transitions. [2023-04-01 12:46:45,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 863 transitions. [2023-04-01 12:46:46,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 12:46:46,002 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:46,002 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, 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] [2023-04-01 12:46:46,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:46:46,002 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:46,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:46,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1148223856, now seen corresponding path program 1 times [2023-04-01 12:46:46,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:46,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983701748] [2023-04-01 12:46:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:46,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:46,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:46,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983701748] [2023-04-01 12:46:46,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983701748] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:46,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:46,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:46:46,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991716224] [2023-04-01 12:46:46,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:46,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:46:46,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:46,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:46:46,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:46:46,087 INFO L87 Difference]: Start difference. First operand 608 states and 863 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:46,231 INFO L93 Difference]: Finished difference Result 1668 states and 2401 transitions. [2023-04-01 12:46:46,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:46:46,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 75 [2023-04-01 12:46:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:46,237 INFO L225 Difference]: With dead ends: 1668 [2023-04-01 12:46:46,237 INFO L226 Difference]: Without dead ends: 1106 [2023-04-01 12:46:46,238 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 [2023-04-01 12:46:46,242 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 45 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:46,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 198 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:46,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2023-04-01 12:46:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1104. [2023-04-01 12:46:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1100 states have (on average 1.4218181818181819) internal successors, (1564), 1100 states have internal predecessors, (1564), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1567 transitions. [2023-04-01 12:46:46,347 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1567 transitions. Word has length 75 [2023-04-01 12:46:46,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:46,348 INFO L495 AbstractCegarLoop]: Abstraction has 1104 states and 1567 transitions. [2023-04-01 12:46:46,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1567 transitions. [2023-04-01 12:46:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 12:46:46,350 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:46,350 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, 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] [2023-04-01 12:46:46,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:46:46,351 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:46,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:46,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1568238065, now seen corresponding path program 1 times [2023-04-01 12:46:46,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:46,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732548654] [2023-04-01 12:46:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:46,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:46,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:46,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732548654] [2023-04-01 12:46:46,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732548654] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:46,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:46,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:46:46,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405634960] [2023-04-01 12:46:46,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:46,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:46:46,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:46,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:46:46,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:46:46,463 INFO L87 Difference]: Start difference. First operand 1104 states and 1567 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:46,744 INFO L93 Difference]: Finished difference Result 3092 states and 4417 transitions. [2023-04-01 12:46:46,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:46:46,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 78 [2023-04-01 12:46:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:46,751 INFO L225 Difference]: With dead ends: 3092 [2023-04-01 12:46:46,752 INFO L226 Difference]: Without dead ends: 2034 [2023-04-01 12:46:46,754 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 [2023-04-01 12:46:46,755 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 40 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:46,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 194 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:46:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2023-04-01 12:46:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 2032. [2023-04-01 12:46:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2028 states have (on average 1.4102564102564104) internal successors, (2860), 2028 states have internal predecessors, (2860), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:46,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2863 transitions. [2023-04-01 12:46:46,931 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2863 transitions. Word has length 78 [2023-04-01 12:46:46,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:46,932 INFO L495 AbstractCegarLoop]: Abstraction has 2032 states and 2863 transitions. [2023-04-01 12:46:46,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:46,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2863 transitions. [2023-04-01 12:46:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 12:46:46,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:46,937 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, 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] [2023-04-01 12:46:46,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:46:46,938 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:46,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:46,938 INFO L85 PathProgramCache]: Analyzing trace with hash 153647088, now seen corresponding path program 1 times [2023-04-01 12:46:46,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:46,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285466413] [2023-04-01 12:46:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:46,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:47,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:47,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285466413] [2023-04-01 12:46:47,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285466413] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:47,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:47,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 12:46:47,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872932502] [2023-04-01 12:46:47,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:47,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 12:46:47,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:47,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 12:46:47,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:46:47,101 INFO L87 Difference]: Start difference. First operand 2032 states and 2863 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:47,935 INFO L93 Difference]: Finished difference Result 8262 states and 11744 transitions. [2023-04-01 12:46:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:46:47,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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 81 [2023-04-01 12:46:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:47,951 INFO L225 Difference]: With dead ends: 8262 [2023-04-01 12:46:47,951 INFO L226 Difference]: Without dead ends: 6276 [2023-04-01 12:46:47,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:46:47,955 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 809 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:47,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 2181 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:46:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6276 states. [2023-04-01 12:46:48,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6276 to 2732. [2023-04-01 12:46:48,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2728 states have (on average 1.3984604105571847) internal successors, (3815), 2728 states have internal predecessors, (3815), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 3818 transitions. [2023-04-01 12:46:48,259 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 3818 transitions. Word has length 81 [2023-04-01 12:46:48,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:48,260 INFO L495 AbstractCegarLoop]: Abstraction has 2732 states and 3818 transitions. [2023-04-01 12:46:48,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:48,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 3818 transitions. [2023-04-01 12:46:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-01 12:46:48,260 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:48,260 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, 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] [2023-04-01 12:46:48,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:46:48,261 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:48,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:48,261 INFO L85 PathProgramCache]: Analyzing trace with hash 732773099, now seen corresponding path program 1 times [2023-04-01 12:46:48,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:48,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329661273] [2023-04-01 12:46:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:48,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:48,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:48,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329661273] [2023-04-01 12:46:48,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329661273] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:48,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:48,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:46:48,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103189064] [2023-04-01 12:46:48,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:48,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:46:48,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:48,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:46:48,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:46:48,320 INFO L87 Difference]: Start difference. First operand 2732 states and 3818 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:48,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:48,811 INFO L93 Difference]: Finished difference Result 6986 states and 9844 transitions. [2023-04-01 12:46:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:46:48,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 83 [2023-04-01 12:46:48,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:48,822 INFO L225 Difference]: With dead ends: 6986 [2023-04-01 12:46:48,822 INFO L226 Difference]: Without dead ends: 4300 [2023-04-01 12:46:48,826 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 [2023-04-01 12:46:48,826 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:48,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 162 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2023-04-01 12:46:49,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 4298. [2023-04-01 12:46:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 4294 states have (on average 1.4054494643688868) internal successors, (6035), 4294 states have internal predecessors, (6035), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 6038 transitions. [2023-04-01 12:46:49,249 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 6038 transitions. Word has length 83 [2023-04-01 12:46:49,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:49,249 INFO L495 AbstractCegarLoop]: Abstraction has 4298 states and 6038 transitions. [2023-04-01 12:46:49,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:49,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 6038 transitions. [2023-04-01 12:46:49,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-01 12:46:49,250 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:49,250 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, 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] [2023-04-01 12:46:49,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:46:49,250 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:49,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:49,251 INFO L85 PathProgramCache]: Analyzing trace with hash 752822442, now seen corresponding path program 1 times [2023-04-01 12:46:49,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:49,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277096964] [2023-04-01 12:46:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:49,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:49,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:49,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277096964] [2023-04-01 12:46:49,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277096964] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:49,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:49,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 12:46:49,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987931027] [2023-04-01 12:46:49,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:49,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 12:46:49,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:49,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 12:46:49,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:46:49,461 INFO L87 Difference]: Start difference. First operand 4298 states and 6038 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:50,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:50,059 INFO L93 Difference]: Finished difference Result 8550 states and 12029 transitions. [2023-04-01 12:46:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 12:46:50,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 83 [2023-04-01 12:46:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:50,083 INFO L225 Difference]: With dead ends: 8550 [2023-04-01 12:46:50,083 INFO L226 Difference]: Without dead ends: 4300 [2023-04-01 12:46:50,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:46:50,088 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 167 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:50,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 427 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:46:50,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2023-04-01 12:46:50,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 4298. [2023-04-01 12:46:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 4294 states have (on average 1.404983698183512) internal successors, (6033), 4294 states have internal predecessors, (6033), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 6036 transitions. [2023-04-01 12:46:50,583 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 6036 transitions. Word has length 83 [2023-04-01 12:46:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:50,583 INFO L495 AbstractCegarLoop]: Abstraction has 4298 states and 6036 transitions. [2023-04-01 12:46:50,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 6036 transitions. [2023-04-01 12:46:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-01 12:46:50,584 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:50,584 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, 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] [2023-04-01 12:46:50,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:46:50,584 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:50,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:50,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1860749910, now seen corresponding path program 1 times [2023-04-01 12:46:50,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:50,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494702027] [2023-04-01 12:46:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:50,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:50,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:50,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494702027] [2023-04-01 12:46:50,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494702027] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:50,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:50,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:46:50,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36567234] [2023-04-01 12:46:50,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:50,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:46:50,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:50,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:46:50,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:46:50,682 INFO L87 Difference]: Start difference. First operand 4298 states and 6036 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:51,266 INFO L93 Difference]: Finished difference Result 8548 states and 12024 transitions. [2023-04-01 12:46:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:46:51,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 84 [2023-04-01 12:46:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:51,278 INFO L225 Difference]: With dead ends: 8548 [2023-04-01 12:46:51,278 INFO L226 Difference]: Without dead ends: 4298 [2023-04-01 12:46:51,285 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 [2023-04-01 12:46:51,285 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 257 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:51,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 82 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:51,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2023-04-01 12:46:51,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4298. [2023-04-01 12:46:51,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 4294 states have (on average 1.3863530507685142) internal successors, (5953), 4294 states have internal predecessors, (5953), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 5956 transitions. [2023-04-01 12:46:51,783 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 5956 transitions. Word has length 84 [2023-04-01 12:46:51,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:51,783 INFO L495 AbstractCegarLoop]: Abstraction has 4298 states and 5956 transitions. [2023-04-01 12:46:51,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 5956 transitions. [2023-04-01 12:46:51,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-01 12:46:51,784 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:51,784 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, 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] [2023-04-01 12:46:51,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:46:51,784 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:51,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:51,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2065946159, now seen corresponding path program 1 times [2023-04-01 12:46:51,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:51,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108533867] [2023-04-01 12:46:51,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:51,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:51,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:51,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108533867] [2023-04-01 12:46:51,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108533867] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:51,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:51,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:46:51,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82803936] [2023-04-01 12:46:51,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:51,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:46:51,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:51,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:46:51,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:46:51,867 INFO L87 Difference]: Start difference. First operand 4298 states and 5956 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:52,464 INFO L93 Difference]: Finished difference Result 8548 states and 11864 transitions. [2023-04-01 12:46:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:46:52,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 84 [2023-04-01 12:46:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:52,476 INFO L225 Difference]: With dead ends: 8548 [2023-04-01 12:46:52,477 INFO L226 Difference]: Without dead ends: 4298 [2023-04-01 12:46:52,483 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 [2023-04-01 12:46:52,483 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 241 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:52,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 90 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:52,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2023-04-01 12:46:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4298. [2023-04-01 12:46:53,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 4294 states have (on average 1.371448532836516) internal successors, (5889), 4294 states have internal predecessors, (5889), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 5892 transitions. [2023-04-01 12:46:53,196 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 5892 transitions. Word has length 84 [2023-04-01 12:46:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:53,196 INFO L495 AbstractCegarLoop]: Abstraction has 4298 states and 5892 transitions. [2023-04-01 12:46:53,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 5892 transitions. [2023-04-01 12:46:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-01 12:46:53,197 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:53,197 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, 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] [2023-04-01 12:46:53,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:46:53,197 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:53,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:53,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1466157430, now seen corresponding path program 1 times [2023-04-01 12:46:53,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:53,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559387404] [2023-04-01 12:46:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:53,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:53,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:53,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559387404] [2023-04-01 12:46:53,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559387404] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:53,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:53,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:46:53,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449015192] [2023-04-01 12:46:53,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:53,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:46:53,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:53,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:46:53,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:46:53,284 INFO L87 Difference]: Start difference. First operand 4298 states and 5892 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:54,007 INFO L93 Difference]: Finished difference Result 8548 states and 11736 transitions. [2023-04-01 12:46:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:46:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 84 [2023-04-01 12:46:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:54,016 INFO L225 Difference]: With dead ends: 8548 [2023-04-01 12:46:54,016 INFO L226 Difference]: Without dead ends: 4298 [2023-04-01 12:46:54,022 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 [2023-04-01 12:46:54,022 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 212 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:54,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 106 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:54,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2023-04-01 12:46:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4298. [2023-04-01 12:46:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 4294 states have (on average 1.3593386120167676) internal successors, (5837), 4294 states have internal predecessors, (5837), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 5840 transitions. [2023-04-01 12:46:54,700 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 5840 transitions. Word has length 84 [2023-04-01 12:46:54,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:54,700 INFO L495 AbstractCegarLoop]: Abstraction has 4298 states and 5840 transitions. [2023-04-01 12:46:54,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 5840 transitions. [2023-04-01 12:46:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-01 12:46:54,701 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:54,701 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, 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] [2023-04-01 12:46:54,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:46:54,701 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:54,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:54,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1963277477, now seen corresponding path program 1 times [2023-04-01 12:46:54,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:54,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521085917] [2023-04-01 12:46:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:54,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:54,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:54,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521085917] [2023-04-01 12:46:54,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521085917] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:54,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:54,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:46:54,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223449520] [2023-04-01 12:46:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:54,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:46:54,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:54,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:46:54,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:46:54,926 INFO L87 Difference]: Start difference. First operand 4298 states and 5840 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:56,008 INFO L93 Difference]: Finished difference Result 7189 states and 9662 transitions. [2023-04-01 12:46:56,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:46:56,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 84 [2023-04-01 12:46:56,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:56,019 INFO L225 Difference]: With dead ends: 7189 [2023-04-01 12:46:56,019 INFO L226 Difference]: Without dead ends: 7187 [2023-04-01 12:46:56,020 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 [2023-04-01 12:46:56,020 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 113 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:56,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 495 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7187 states. [2023-04-01 12:46:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7187 to 4426. [2023-04-01 12:46:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4422 states have (on average 1.3272274988692898) internal successors, (5869), 4422 states have internal predecessors, (5869), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 5872 transitions. [2023-04-01 12:46:56,714 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 5872 transitions. Word has length 84 [2023-04-01 12:46:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:56,714 INFO L495 AbstractCegarLoop]: Abstraction has 4426 states and 5872 transitions. [2023-04-01 12:46:56,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:46:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 5872 transitions. [2023-04-01 12:46:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 12:46:56,716 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:56,716 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:46:56,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:46:56,716 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:56,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:56,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1937180943, now seen corresponding path program 1 times [2023-04-01 12:46:56,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:56,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202100716] [2023-04-01 12:46:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:56,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:47:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:47:07,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:47:07,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202100716] [2023-04-01 12:47:07,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202100716] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:47:07,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391349204] [2023-04-01 12:47:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:47:07,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:47:07,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:47:07,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:47:07,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:47:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:47:07,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 99 conjunts are in the unsatisfiable core [2023-04-01 12:47:07,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:47:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:47:36,616 INFO L327 TraceCheckSpWp]: Computing backward predicates...