/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:42:29,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:42:29,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:42:30,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:42:30,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:42:30,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:42:30,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:42:30,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:42:30,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:42:30,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:42:30,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:42:30,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:42:30,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:42:30,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:42:30,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:42:30,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:42:30,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:42:30,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:42:30,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:42:30,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:42:30,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:42:30,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:42:30,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:42:30,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:42:30,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:42:30,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:42:30,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:42:30,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:42:30,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:42:30,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:42:30,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:42:30,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:42:30,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:42:30,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:42:30,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:42:30,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:42:30,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:42:30,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:42:30,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:42:30,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:42:30,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:42:30,058 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 06:42:30,087 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:42:30,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:42:30,088 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:42:30,088 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:42:30,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:42:30,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:42:30,089 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:42:30,089 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:42:30,089 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:42:30,089 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:42:30,090 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:42:30,090 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:42:30,090 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:42:30,090 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:42:30,090 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:42:30,091 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:42:30,091 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:42:30,091 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:42:30,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:42:30,091 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:42:30,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:42:30,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:42:30,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:42:30,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:42:30,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:42:30,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:42:30,092 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:42:30,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:42:30,092 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:42:30,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:42:30,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:42:30,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:42:30,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:42:30,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:42:30,093 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:42:30,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:42:30,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:42:30,093 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:42:30,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:42:30,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:42:30,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:42:30,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:42:30,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:42:30,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:42:30,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:42:30,327 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:42:30,328 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:42:30,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:42:31,384 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:42:31,529 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:42:31,529 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:42:31,536 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/794655303/a32f4f03bb2c4296b679ddfd15791394/FLAGa2d48cc31 [2023-04-01 06:42:31,546 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/794655303/a32f4f03bb2c4296b679ddfd15791394 [2023-04-01 06:42:31,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:42:31,548 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:42:31,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:42:31,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:42:31,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:42:31,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:42:31" (1/1) ... [2023-04-01 06:42:31,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41374023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:42:31, skipping insertion in model container [2023-04-01 06:42:31,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:42:31" (1/1) ... [2023-04-01 06:42:31,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:42:31,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:42:31,772 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.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[8640,8653] [2023-04-01 06:42:31,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:42:31,818 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:42:31,861 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.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[8640,8653] [2023-04-01 06:42:31,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:42:31,896 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:42:31,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:42:31 WrapperNode [2023-04-01 06:42:31,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:42:31,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:42:31,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:42:31,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:42:31,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:42:31" (1/1) ... [2023-04-01 06:42:31,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:42:31" (1/1) ... [2023-04-01 06:42:31,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:42:31" (1/1) ... [2023-04-01 06:42:31,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:42:31" (1/1) ... [2023-04-01 06:42:31,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:42:31" (1/1) ... [2023-04-01 06:42:31,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:42:31" (1/1) ... [2023-04-01 06:42:31,937 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:42:31" (1/1) ... [2023-04-01 06:42:31,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:42:31" (1/1) ... [2023-04-01 06:42:31,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:42:31,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:42:31,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:42:31,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:42:31,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:42:31" (1/1) ... [2023-04-01 06:42:31,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:42:31,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:42:32,006 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 06:42:32,045 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 06:42:32,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:42:32,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:42:32,079 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:42:32,079 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:42:32,079 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:42:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:42:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:42:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:42:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:42:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:42:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:42:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:42:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:42:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:42:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:42:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:42:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:42:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:42:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:42:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:42:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 06:42:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-01 06:42:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2023-04-01 06:42:32,080 INFO L130 BoogieDeclarations]: Found specification of procedure node8 [2023-04-01 06:42:32,081 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:42:32,081 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:42:32,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:42:32,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:42:32,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:42:32,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:42:32,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:42:32,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:42:32,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:42:32,177 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:42:32,178 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:42:32,648 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:42:32,765 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:42:32,765 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:42:32,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:42:32 BoogieIcfgContainer [2023-04-01 06:42:32,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:42:32,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:42:32,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:42:32,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:42:32,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:42:31" (1/3) ... [2023-04-01 06:42:32,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318c3412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:42:32, skipping insertion in model container [2023-04-01 06:42:32,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:42:31" (2/3) ... [2023-04-01 06:42:32,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318c3412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:42:32, skipping insertion in model container [2023-04-01 06:42:32,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:42:32" (3/3) ... [2023-04-01 06:42:32,777 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:42:32,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:42:32,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:42:32,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:42:32,844 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;@b95b1ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:42:32,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:42:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 122 states have (on average 1.7540983606557377) internal successors, (214), 124 states have internal predecessors, (214), 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 06:42:32,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 06:42:32,859 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:32,860 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, 1, 1, 1, 1] [2023-04-01 06:42:32,861 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:32,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:32,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1305029927, now seen corresponding path program 1 times [2023-04-01 06:42:32,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:32,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268536566] [2023-04-01 06:42:32,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:32,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:33,275 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 06:42:33,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:33,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268536566] [2023-04-01 06:42:33,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268536566] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:33,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:33,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:42:33,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490259060] [2023-04-01 06:42:33,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:33,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:42:33,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:33,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:42:33,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:42:33,323 INFO L87 Difference]: Start difference. First operand has 129 states, 122 states have (on average 1.7540983606557377) internal successors, (214), 124 states have internal predecessors, (214), 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 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 06:42:33,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:33,430 INFO L93 Difference]: Finished difference Result 249 states and 390 transitions. [2023-04-01 06:42:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:42:33,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 88 [2023-04-01 06:42:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:33,440 INFO L225 Difference]: With dead ends: 249 [2023-04-01 06:42:33,440 INFO L226 Difference]: Without dead ends: 177 [2023-04-01 06:42:33,443 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 06:42:33,447 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 144 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:33,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 358 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:42:33,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-04-01 06:42:33,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2023-04-01 06:42:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.3099415204678362) internal successors, (224), 171 states have internal predecessors, (224), 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 06:42:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 227 transitions. [2023-04-01 06:42:33,540 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 227 transitions. Word has length 88 [2023-04-01 06:42:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:33,542 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 227 transitions. [2023-04-01 06:42:33,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 06:42:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 227 transitions. [2023-04-01 06:42:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 06:42:33,544 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:33,545 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:42:33,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:42:33,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:33,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:33,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1208346824, now seen corresponding path program 1 times [2023-04-01 06:42:33,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:33,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123772568] [2023-04-01 06:42:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:33,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:33,676 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 06:42:33,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:33,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123772568] [2023-04-01 06:42:33,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123772568] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:33,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:33,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:42:33,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099779153] [2023-04-01 06:42:33,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:33,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:42:33,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:33,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:42:33,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:42:33,679 INFO L87 Difference]: Start difference. First operand 175 states and 227 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 06:42:33,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:33,733 INFO L93 Difference]: Finished difference Result 383 states and 535 transitions. [2023-04-01 06:42:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:42:33,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 91 [2023-04-01 06:42:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:33,738 INFO L225 Difference]: With dead ends: 383 [2023-04-01 06:42:33,738 INFO L226 Difference]: Without dead ends: 275 [2023-04-01 06:42:33,741 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 06:42:33,742 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 78 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:33,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 279 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:42:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-04-01 06:42:33,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 273. [2023-04-01 06:42:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 269 states have (on average 1.3717472118959109) internal successors, (369), 269 states have internal predecessors, (369), 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 06:42:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 372 transitions. [2023-04-01 06:42:33,774 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 372 transitions. Word has length 91 [2023-04-01 06:42:33,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:33,774 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 372 transitions. [2023-04-01 06:42:33,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 06:42:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 372 transitions. [2023-04-01 06:42:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 06:42:33,776 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:33,776 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:42:33,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:42:33,777 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:33,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:33,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1795800899, now seen corresponding path program 1 times [2023-04-01 06:42:33,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:33,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839081937] [2023-04-01 06:42:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:33,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:33,888 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 06:42:33,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:33,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839081937] [2023-04-01 06:42:33,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839081937] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:33,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:33,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:42:33,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358217114] [2023-04-01 06:42:33,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:33,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:42:33,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:42:33,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:42:33,890 INFO L87 Difference]: Start difference. First operand 273 states and 372 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 06:42:33,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:33,956 INFO L93 Difference]: Finished difference Result 669 states and 958 transitions. [2023-04-01 06:42:33,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:42:33,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 94 [2023-04-01 06:42:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:33,959 INFO L225 Difference]: With dead ends: 669 [2023-04-01 06:42:33,959 INFO L226 Difference]: Without dead ends: 463 [2023-04-01 06:42:33,961 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 06:42:33,962 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 73 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:33,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 275 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:42:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-04-01 06:42:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 461. [2023-04-01 06:42:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 457 states have (on average 1.411378555798687) internal successors, (645), 457 states have internal predecessors, (645), 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 06:42:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 648 transitions. [2023-04-01 06:42:33,995 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 648 transitions. Word has length 94 [2023-04-01 06:42:33,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:33,996 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 648 transitions. [2023-04-01 06:42:33,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 06:42:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 648 transitions. [2023-04-01 06:42:34,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 06:42:34,003 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:34,004 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:42:34,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:42:34,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:34,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:34,005 INFO L85 PathProgramCache]: Analyzing trace with hash 340054227, now seen corresponding path program 1 times [2023-04-01 06:42:34,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:34,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997946628] [2023-04-01 06:42:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:34,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:34,170 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 06:42:34,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:34,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997946628] [2023-04-01 06:42:34,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997946628] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:34,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:34,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:42:34,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818492224] [2023-04-01 06:42:34,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:34,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:42:34,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:34,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:42:34,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:42:34,172 INFO L87 Difference]: Start difference. First operand 461 states and 648 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 06:42:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:34,290 INFO L93 Difference]: Finished difference Result 1217 states and 1762 transitions. [2023-04-01 06:42:34,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:42:34,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 97 [2023-04-01 06:42:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:34,295 INFO L225 Difference]: With dead ends: 1217 [2023-04-01 06:42:34,295 INFO L226 Difference]: Without dead ends: 823 [2023-04-01 06:42:34,296 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 06:42:34,303 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 68 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:34,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 271 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:42:34,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2023-04-01 06:42:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 821. [2023-04-01 06:42:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 817 states have (on average 1.430844553243574) internal successors, (1169), 817 states have internal predecessors, (1169), 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 06:42:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1172 transitions. [2023-04-01 06:42:34,393 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1172 transitions. Word has length 97 [2023-04-01 06:42:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:34,394 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1172 transitions. [2023-04-01 06:42:34,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 06:42:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1172 transitions. [2023-04-01 06:42:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 06:42:34,397 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:34,398 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:42:34,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:42:34,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:34,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:34,398 INFO L85 PathProgramCache]: Analyzing trace with hash 349509693, now seen corresponding path program 1 times [2023-04-01 06:42:34,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:34,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364810517] [2023-04-01 06:42:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:34,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:34,483 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 06:42:34,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:34,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364810517] [2023-04-01 06:42:34,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364810517] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:34,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:34,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:42:34,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330243851] [2023-04-01 06:42:34,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:34,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:42:34,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:34,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:42:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:42:34,488 INFO L87 Difference]: Start difference. First operand 821 states and 1172 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 06:42:34,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:34,717 INFO L93 Difference]: Finished difference Result 2265 states and 3286 transitions. [2023-04-01 06:42:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:42:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 100 [2023-04-01 06:42:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:34,722 INFO L225 Difference]: With dead ends: 2265 [2023-04-01 06:42:34,722 INFO L226 Difference]: Without dead ends: 1511 [2023-04-01 06:42:34,723 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 06:42:34,725 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 63 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:34,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 267 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:42:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2023-04-01 06:42:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1509. [2023-04-01 06:42:34,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1505 states have (on average 1.4358803986710964) internal successors, (2161), 1505 states have internal predecessors, (2161), 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 06:42:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 2164 transitions. [2023-04-01 06:42:34,890 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 2164 transitions. Word has length 100 [2023-04-01 06:42:34,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:34,890 INFO L495 AbstractCegarLoop]: Abstraction has 1509 states and 2164 transitions. [2023-04-01 06:42:34,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 06:42:34,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 2164 transitions. [2023-04-01 06:42:34,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 06:42:34,891 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:34,891 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:42:34,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:42:34,892 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:34,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:34,892 INFO L85 PathProgramCache]: Analyzing trace with hash -970316622, now seen corresponding path program 1 times [2023-04-01 06:42:34,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:34,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869777320] [2023-04-01 06:42:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:34,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:34,981 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 06:42:34,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:34,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869777320] [2023-04-01 06:42:34,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869777320] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:34,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:34,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:42:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417439818] [2023-04-01 06:42:34,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:34,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:42:34,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:42:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:42:34,983 INFO L87 Difference]: Start difference. First operand 1509 states and 2164 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 06:42:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:35,292 INFO L93 Difference]: Finished difference Result 4265 states and 6166 transitions. [2023-04-01 06:42:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:42:35,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 103 [2023-04-01 06:42:35,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:35,300 INFO L225 Difference]: With dead ends: 4265 [2023-04-01 06:42:35,301 INFO L226 Difference]: Without dead ends: 2823 [2023-04-01 06:42:35,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:42:35,304 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 58 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:35,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 263 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:42:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2023-04-01 06:42:35,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2821. [2023-04-01 06:42:35,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2817 states have (on average 1.4316648917287895) internal successors, (4033), 2817 states have internal predecessors, (4033), 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 06:42:35,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 4036 transitions. [2023-04-01 06:42:35,534 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 4036 transitions. Word has length 103 [2023-04-01 06:42:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:35,534 INFO L495 AbstractCegarLoop]: Abstraction has 2821 states and 4036 transitions. [2023-04-01 06:42:35,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 06:42:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 4036 transitions. [2023-04-01 06:42:35,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 06:42:35,535 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:35,535 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, 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 06:42:35,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:42:35,535 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:35,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:35,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1032432923, now seen corresponding path program 1 times [2023-04-01 06:42:35,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:35,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562223436] [2023-04-01 06:42:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:35,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:35,609 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 06:42:35,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:35,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562223436] [2023-04-01 06:42:35,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562223436] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:35,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:35,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:42:35,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805315305] [2023-04-01 06:42:35,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:35,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:42:35,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:42:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:42:35,611 INFO L87 Difference]: Start difference. First operand 2821 states and 4036 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 06:42:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:36,113 INFO L93 Difference]: Finished difference Result 8073 states and 11590 transitions. [2023-04-01 06:42:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:42:36,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 106 [2023-04-01 06:42:36,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:36,128 INFO L225 Difference]: With dead ends: 8073 [2023-04-01 06:42:36,128 INFO L226 Difference]: Without dead ends: 5319 [2023-04-01 06:42:36,134 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 06:42:36,135 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 53 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:36,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 259 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:42:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2023-04-01 06:42:36,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5317. [2023-04-01 06:42:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5317 states, 5313 states have (on average 1.4216073781291172) internal successors, (7553), 5313 states have internal predecessors, (7553), 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 06:42:36,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 7556 transitions. [2023-04-01 06:42:36,626 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 7556 transitions. Word has length 106 [2023-04-01 06:42:36,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:36,626 INFO L495 AbstractCegarLoop]: Abstraction has 5317 states and 7556 transitions. [2023-04-01 06:42:36,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 06:42:36,627 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 7556 transitions. [2023-04-01 06:42:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-01 06:42:36,627 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:36,627 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, 1, 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 06:42:36,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:42:36,628 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:36,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:36,628 INFO L85 PathProgramCache]: Analyzing trace with hash -33434885, now seen corresponding path program 1 times [2023-04-01 06:42:36,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:36,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616760063] [2023-04-01 06:42:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:36,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:36,709 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 06:42:36,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:36,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616760063] [2023-04-01 06:42:36,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616760063] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:36,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:36,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:42:36,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974896887] [2023-04-01 06:42:36,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:36,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:42:36,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:36,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:42:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:42:36,714 INFO L87 Difference]: Start difference. First operand 5317 states and 7556 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 06:42:38,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:38,026 INFO L93 Difference]: Finished difference Result 15305 states and 21766 transitions. [2023-04-01 06:42:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:42:38,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 109 [2023-04-01 06:42:38,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:38,066 INFO L225 Difference]: With dead ends: 15305 [2023-04-01 06:42:38,066 INFO L226 Difference]: Without dead ends: 10055 [2023-04-01 06:42:38,077 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 06:42:38,079 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 48 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:38,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 255 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:42:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10055 states. [2023-04-01 06:42:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10055 to 10053. [2023-04-01 06:42:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10053 states, 10049 states have (on average 1.4076027465419445) internal successors, (14145), 10049 states have internal predecessors, (14145), 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 06:42:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10053 states to 10053 states and 14148 transitions. [2023-04-01 06:42:39,076 INFO L78 Accepts]: Start accepts. Automaton has 10053 states and 14148 transitions. Word has length 109 [2023-04-01 06:42:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:39,076 INFO L495 AbstractCegarLoop]: Abstraction has 10053 states and 14148 transitions. [2023-04-01 06:42:39,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 06:42:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 10053 states and 14148 transitions. [2023-04-01 06:42:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 06:42:39,077 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:39,077 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, 1, 1, 1, 1, 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 06:42:39,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:42:39,077 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:39,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:39,077 INFO L85 PathProgramCache]: Analyzing trace with hash -321597339, now seen corresponding path program 1 times [2023-04-01 06:42:39,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:39,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646419206] [2023-04-01 06:42:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:39,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:39,270 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 06:42:39,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:39,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646419206] [2023-04-01 06:42:39,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646419206] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:39,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:39,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 06:42:39,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279811432] [2023-04-01 06:42:39,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:39,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 06:42:39,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:39,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 06:42:39,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 06:42:39,272 INFO L87 Difference]: Start difference. First operand 10053 states and 14148 transitions. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 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 06:42:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:42,736 INFO L93 Difference]: Finished difference Result 39543 states and 56057 transitions. [2023-04-01 06:42:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 06:42:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 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 112 [2023-04-01 06:42:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:42,919 INFO L225 Difference]: With dead ends: 39543 [2023-04-01 06:42:42,920 INFO L226 Difference]: Without dead ends: 29557 [2023-04-01 06:42:42,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2023-04-01 06:42:42,947 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 1473 mSDsluCounter, 4716 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 4855 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:42,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1473 Valid, 4855 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:42:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29557 states. [2023-04-01 06:42:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29557 to 12865. [2023-04-01 06:42:44,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12865 states, 12861 states have (on average 1.3980250369333644) internal successors, (17980), 12861 states have internal predecessors, (17980), 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 06:42:44,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12865 states to 12865 states and 17983 transitions. [2023-04-01 06:42:44,804 INFO L78 Accepts]: Start accepts. Automaton has 12865 states and 17983 transitions. Word has length 112 [2023-04-01 06:42:44,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:44,805 INFO L495 AbstractCegarLoop]: Abstraction has 12865 states and 17983 transitions. [2023-04-01 06:42:44,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 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 06:42:44,805 INFO L276 IsEmpty]: Start isEmpty. Operand 12865 states and 17983 transitions. [2023-04-01 06:42:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 06:42:44,806 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:44,806 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, 1, 1, 1, 1, 1, 1, 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 06:42:44,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:42:44,806 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:44,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:44,807 INFO L85 PathProgramCache]: Analyzing trace with hash -710585024, now seen corresponding path program 1 times [2023-04-01 06:42:44,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:44,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126603856] [2023-04-01 06:42:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:44,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:44,880 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 06:42:44,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:44,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126603856] [2023-04-01 06:42:44,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126603856] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:44,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:44,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:42:44,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736456731] [2023-04-01 06:42:44,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:44,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:42:44,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:44,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:42:44,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:42:44,881 INFO L87 Difference]: Start difference. First operand 12865 states and 17983 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 06:42:47,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:47,013 INFO L93 Difference]: Finished difference Result 32959 states and 46329 transitions. [2023-04-01 06:42:47,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:42:47,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 114 [2023-04-01 06:42:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:47,059 INFO L225 Difference]: With dead ends: 32959 [2023-04-01 06:42:47,059 INFO L226 Difference]: Without dead ends: 20161 [2023-04-01 06:42:47,079 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 06:42:47,079 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 42 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:47,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 215 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:42:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20161 states. [2023-04-01 06:42:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20161 to 20159. [2023-04-01 06:42:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20159 states, 20155 states have (on average 1.4031257752418755) internal successors, (28280), 20155 states have internal predecessors, (28280), 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 06:42:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20159 states to 20159 states and 28283 transitions. [2023-04-01 06:42:49,520 INFO L78 Accepts]: Start accepts. Automaton has 20159 states and 28283 transitions. Word has length 114 [2023-04-01 06:42:49,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:49,520 INFO L495 AbstractCegarLoop]: Abstraction has 20159 states and 28283 transitions. [2023-04-01 06:42:49,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 06:42:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 20159 states and 28283 transitions. [2023-04-01 06:42:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 06:42:49,521 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:49,521 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, 1, 1, 1, 1, 1, 1, 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 06:42:49,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:42:49,521 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:49,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:49,521 INFO L85 PathProgramCache]: Analyzing trace with hash -690535681, now seen corresponding path program 1 times [2023-04-01 06:42:49,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:49,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119045904] [2023-04-01 06:42:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:49,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:49,943 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 06:42:49,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:49,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119045904] [2023-04-01 06:42:49,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119045904] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:49,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:49,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 06:42:49,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237073752] [2023-04-01 06:42:49,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:49,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 06:42:49,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 06:42:49,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-01 06:42:49,945 INFO L87 Difference]: Start difference. First operand 20159 states and 28283 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 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 06:42:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:52,612 INFO L93 Difference]: Finished difference Result 40251 states and 56498 transitions. [2023-04-01 06:42:52,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 06:42:52,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 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 114 [2023-04-01 06:42:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:52,652 INFO L225 Difference]: With dead ends: 40251 [2023-04-01 06:42:52,652 INFO L226 Difference]: Without dead ends: 20161 [2023-04-01 06:42:52,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2023-04-01 06:42:52,686 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 272 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:52,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 728 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:42:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20161 states. [2023-04-01 06:42:55,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20161 to 20159. [2023-04-01 06:42:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20159 states, 20155 states have (on average 1.403026544281816) internal successors, (28278), 20155 states have internal predecessors, (28278), 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 06:42:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20159 states to 20159 states and 28281 transitions. [2023-04-01 06:42:55,312 INFO L78 Accepts]: Start accepts. Automaton has 20159 states and 28281 transitions. Word has length 114 [2023-04-01 06:42:55,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:42:55,313 INFO L495 AbstractCegarLoop]: Abstraction has 20159 states and 28281 transitions. [2023-04-01 06:42:55,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 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 06:42:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 20159 states and 28281 transitions. [2023-04-01 06:42:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 06:42:55,313 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:42:55,313 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, 1, 1, 1, 1, 1, 1, 1, 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 06:42:55,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 06:42:55,314 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:42:55,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:42:55,314 INFO L85 PathProgramCache]: Analyzing trace with hash 66321146, now seen corresponding path program 1 times [2023-04-01 06:42:55,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:42:55,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466833509] [2023-04-01 06:42:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:42:55,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:42:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:42:55,432 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 06:42:55,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:42:55,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466833509] [2023-04-01 06:42:55,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466833509] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:42:55,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:42:55,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:42:55,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147400497] [2023-04-01 06:42:55,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:42:55,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:42:55,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:42:55,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:42:55,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:42:55,434 INFO L87 Difference]: Start difference. First operand 20159 states and 28281 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 06:42:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:42:58,344 INFO L93 Difference]: Finished difference Result 40249 states and 56493 transitions. [2023-04-01 06:42:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:42:58,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 115 [2023-04-01 06:42:58,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:42:58,372 INFO L225 Difference]: With dead ends: 40249 [2023-04-01 06:42:58,372 INFO L226 Difference]: Without dead ends: 20159 [2023-04-01 06:42:58,393 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 06:42:58,393 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 275 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:42:58,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 155 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:42:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20159 states. [2023-04-01 06:43:01,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20159 to 20159. [2023-04-01 06:43:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20159 states, 20155 states have (on average 1.3934011411560407) internal successors, (28084), 20155 states have internal predecessors, (28084), 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 06:43:01,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20159 states to 20159 states and 28087 transitions. [2023-04-01 06:43:01,287 INFO L78 Accepts]: Start accepts. Automaton has 20159 states and 28087 transitions. Word has length 115 [2023-04-01 06:43:01,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:01,287 INFO L495 AbstractCegarLoop]: Abstraction has 20159 states and 28087 transitions. [2023-04-01 06:43:01,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 06:43:01,288 INFO L276 IsEmpty]: Start isEmpty. Operand 20159 states and 28087 transitions. [2023-04-01 06:43:01,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 06:43:01,288 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:01,288 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, 1, 1, 1, 1, 1, 1, 1, 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 06:43:01,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 06:43:01,288 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:01,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash -462969355, now seen corresponding path program 1 times [2023-04-01 06:43:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:01,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888680841] [2023-04-01 06:43:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:01,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:01,397 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 06:43:01,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:01,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888680841] [2023-04-01 06:43:01,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888680841] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:01,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:01,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:43:01,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922346792] [2023-04-01 06:43:01,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:01,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:43:01,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:01,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:43:01,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:01,399 INFO L87 Difference]: Start difference. First operand 20159 states and 28087 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 06:43:04,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:04,514 INFO L93 Difference]: Finished difference Result 40249 states and 56105 transitions. [2023-04-01 06:43:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:43:04,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 115 [2023-04-01 06:43:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:04,546 INFO L225 Difference]: With dead ends: 40249 [2023-04-01 06:43:04,547 INFO L226 Difference]: Without dead ends: 20159 [2023-04-01 06:43:04,597 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 06:43:04,598 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 298 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:04,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 139 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:43:04,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20159 states. [2023-04-01 06:43:07,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20159 to 20159. [2023-04-01 06:43:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20159 states, 20155 states have (on average 1.3834780451500868) internal successors, (27884), 20155 states have internal predecessors, (27884), 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 06:43:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20159 states to 20159 states and 27887 transitions. [2023-04-01 06:43:07,713 INFO L78 Accepts]: Start accepts. Automaton has 20159 states and 27887 transitions. Word has length 115 [2023-04-01 06:43:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:07,714 INFO L495 AbstractCegarLoop]: Abstraction has 20159 states and 27887 transitions. [2023-04-01 06:43:07,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 06:43:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 20159 states and 27887 transitions. [2023-04-01 06:43:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 06:43:07,715 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:07,715 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, 1, 1, 1, 1, 1, 1, 1, 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 06:43:07,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 06:43:07,715 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:07,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:07,715 INFO L85 PathProgramCache]: Analyzing trace with hash -334884048, now seen corresponding path program 1 times [2023-04-01 06:43:07,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:07,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277737662] [2023-04-01 06:43:07,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:07,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:07,800 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 06:43:07,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:07,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277737662] [2023-04-01 06:43:07,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277737662] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:07,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:07,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:43:07,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329873167] [2023-04-01 06:43:07,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:07,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:43:07,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:07,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:43:07,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:07,802 INFO L87 Difference]: Start difference. First operand 20159 states and 27887 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 06:43:11,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:11,123 INFO L93 Difference]: Finished difference Result 40249 states and 55705 transitions. [2023-04-01 06:43:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:43:11,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 115 [2023-04-01 06:43:11,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:11,154 INFO L225 Difference]: With dead ends: 40249 [2023-04-01 06:43:11,154 INFO L226 Difference]: Without dead ends: 20159 [2023-04-01 06:43:11,178 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 06:43:11,178 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 334 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:11,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 115 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:43:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20159 states. [2023-04-01 06:43:14,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20159 to 20159. [2023-04-01 06:43:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20159 states, 20155 states have (on average 1.370776482262466) internal successors, (27628), 20155 states have internal predecessors, (27628), 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 06:43:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20159 states to 20159 states and 27631 transitions. [2023-04-01 06:43:14,483 INFO L78 Accepts]: Start accepts. Automaton has 20159 states and 27631 transitions. Word has length 115 [2023-04-01 06:43:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:14,483 INFO L495 AbstractCegarLoop]: Abstraction has 20159 states and 27631 transitions. [2023-04-01 06:43:14,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 06:43:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 20159 states and 27631 transitions. [2023-04-01 06:43:14,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 06:43:14,484 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:14,484 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, 1, 1, 1, 1, 1, 1, 1, 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 06:43:14,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 06:43:14,484 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:14,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:14,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2076301163, now seen corresponding path program 1 times [2023-04-01 06:43:14,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:14,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445398718] [2023-04-01 06:43:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:14,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:14,574 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 06:43:14,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:14,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445398718] [2023-04-01 06:43:14,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445398718] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:14,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:14,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:43:14,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328370342] [2023-04-01 06:43:14,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:14,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:43:14,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:14,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:43:14,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:14,575 INFO L87 Difference]: Start difference. First operand 20159 states and 27631 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 06:43:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:18,092 INFO L93 Difference]: Finished difference Result 40249 states and 55193 transitions. [2023-04-01 06:43:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:43:18,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 115 [2023-04-01 06:43:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:18,120 INFO L225 Difference]: With dead ends: 40249 [2023-04-01 06:43:18,120 INFO L226 Difference]: Without dead ends: 20159 [2023-04-01 06:43:18,138 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 06:43:18,138 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 318 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:18,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 123 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:43:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20159 states. [2023-04-01 06:43:21,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20159 to 20159. [2023-04-01 06:43:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20159 states, 20155 states have (on average 1.3596626147357975) internal successors, (27404), 20155 states have internal predecessors, (27404), 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 06:43:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20159 states to 20159 states and 27407 transitions. [2023-04-01 06:43:21,615 INFO L78 Accepts]: Start accepts. Automaton has 20159 states and 27407 transitions. Word has length 115 [2023-04-01 06:43:21,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:21,616 INFO L495 AbstractCegarLoop]: Abstraction has 20159 states and 27407 transitions. [2023-04-01 06:43:21,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 06:43:21,616 INFO L276 IsEmpty]: Start isEmpty. Operand 20159 states and 27407 transitions. [2023-04-01 06:43:21,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 06:43:21,616 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:21,616 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, 1, 1, 1, 1, 1, 1, 1, 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 06:43:21,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 06:43:21,616 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:21,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:21,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1708029936, now seen corresponding path program 1 times [2023-04-01 06:43:21,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:21,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761087657] [2023-04-01 06:43:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:21,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:21,699 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 06:43:21,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:21,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761087657] [2023-04-01 06:43:21,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761087657] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:21,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:21,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:43:21,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89679075] [2023-04-01 06:43:21,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:21,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:43:21,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:21,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:43:21,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:21,700 INFO L87 Difference]: Start difference. First operand 20159 states and 27407 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 06:43:25,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:25,390 INFO L93 Difference]: Finished difference Result 40249 states and 54745 transitions. [2023-04-01 06:43:25,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:43:25,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 115 [2023-04-01 06:43:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:25,420 INFO L225 Difference]: With dead ends: 40249 [2023-04-01 06:43:25,420 INFO L226 Difference]: Without dead ends: 20159 [2023-04-01 06:43:25,444 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 06:43:25,445 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 302 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:25,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 131 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:43:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20159 states. [2023-04-01 06:43:29,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20159 to 20159. [2023-04-01 06:43:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20159 states, 20155 states have (on average 1.3493425948896056) internal successors, (27196), 20155 states have internal predecessors, (27196), 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 06:43:29,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20159 states to 20159 states and 27199 transitions. [2023-04-01 06:43:29,251 INFO L78 Accepts]: Start accepts. Automaton has 20159 states and 27199 transitions. Word has length 115 [2023-04-01 06:43:29,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:29,251 INFO L495 AbstractCegarLoop]: Abstraction has 20159 states and 27199 transitions. [2023-04-01 06:43:29,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 06:43:29,251 INFO L276 IsEmpty]: Start isEmpty. Operand 20159 states and 27199 transitions. [2023-04-01 06:43:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 06:43:29,252 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:29,252 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, 1, 1, 1, 1, 1, 1, 1, 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 06:43:29,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 06:43:29,253 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:29,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:29,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1824073653, now seen corresponding path program 1 times [2023-04-01 06:43:29,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:29,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217866895] [2023-04-01 06:43:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:29,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:29,332 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 06:43:29,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:29,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217866895] [2023-04-01 06:43:29,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217866895] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:29,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:29,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:43:29,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896272242] [2023-04-01 06:43:29,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:29,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:43:29,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:29,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:43:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:29,334 INFO L87 Difference]: Start difference. First operand 20159 states and 27199 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 06:43:33,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:43:33,191 INFO L93 Difference]: Finished difference Result 40251 states and 54330 transitions. [2023-04-01 06:43:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:43:33,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 115 [2023-04-01 06:43:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:43:33,223 INFO L225 Difference]: With dead ends: 40251 [2023-04-01 06:43:33,223 INFO L226 Difference]: Without dead ends: 20161 [2023-04-01 06:43:33,245 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 06:43:33,245 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 488 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:43:33,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 136 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:43:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20161 states. [2023-04-01 06:43:37,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20161 to 20159. [2023-04-01 06:43:37,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20159 states, 20155 states have (on average 1.3366410320019846) internal successors, (26940), 20155 states have internal predecessors, (26940), 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 06:43:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20159 states to 20159 states and 26943 transitions. [2023-04-01 06:43:37,210 INFO L78 Accepts]: Start accepts. Automaton has 20159 states and 26943 transitions. Word has length 115 [2023-04-01 06:43:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:43:37,211 INFO L495 AbstractCegarLoop]: Abstraction has 20159 states and 26943 transitions. [2023-04-01 06:43:37,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 06:43:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 20159 states and 26943 transitions. [2023-04-01 06:43:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 06:43:37,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:43:37,212 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, 1, 1, 1, 1, 1, 1, 1, 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 06:43:37,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 06:43:37,212 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:43:37,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:43:37,212 INFO L85 PathProgramCache]: Analyzing trace with hash -724466982, now seen corresponding path program 1 times [2023-04-01 06:43:37,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:43:37,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574279827] [2023-04-01 06:43:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:43:37,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:43:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:43:37,439 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 06:43:37,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:43:37,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574279827] [2023-04-01 06:43:37,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574279827] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:43:37,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:43:37,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:43:37,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17465748] [2023-04-01 06:43:37,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:43:37,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:43:37,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:43:37,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:43:37,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:43:37,441 INFO L87 Difference]: Start difference. First operand 20159 states and 26943 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 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)