/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/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:07:39,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:07:39,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:07:39,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:07:39,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:07:39,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:07:39,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:07:39,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:07:39,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:07:39,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:07:39,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:07:39,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:07:39,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:07:39,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:07:39,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:07:39,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:07:39,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:07:39,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:07:39,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:07:39,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:07:39,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:07:39,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:07:39,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:07:39,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:07:39,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:07:39,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:07:39,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:07:39,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:07:39,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:07:39,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:07:39,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:07:39,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:07:39,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:07:39,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:07:39,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:07:39,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:07:39,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:07:39,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:07:39,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:07:39,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:07:39,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:07:39,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:07:39,138 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:07:39,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:07:39,139 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:07:39,139 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:07:39,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:07:39,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:07:39,139 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:07:39,139 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:07:39,140 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:07:39,140 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:07:39,140 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:07:39,140 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:07:39,140 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:07:39,140 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:07:39,141 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:07:39,141 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:07:39,141 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:07:39,141 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:07:39,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:07:39,141 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:07:39,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:07:39,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:07:39,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:07:39,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:07:39,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:07:39,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:07:39,142 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:07:39,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:07:39,142 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:07:39,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:07:39,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:07:39,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:07:39,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:07:39,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:07:39,143 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:07:39,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:07:39,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:07:39,143 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:07:39,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:07:39,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:07:39,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:07:39,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:07:39,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:07:39,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:07:39,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:07:39,344 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:07:39,345 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:07:39,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c [2023-04-03 02:07:40,291 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:07:40,537 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:07:40,538 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c [2023-04-03 02:07:40,555 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc56d451/a56ea3ffc8314d15b679f69d44144ae0/FLAGc39d87c4e [2023-04-03 02:07:40,564 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc56d451/a56ea3ffc8314d15b679f69d44144ae0 [2023-04-03 02:07:40,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:07:40,567 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:07:40,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:07:40,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:07:40,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:07:40,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:07:40" (1/1) ... [2023-04-03 02:07:40,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ab730d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:40, skipping insertion in model container [2023-04-03 02:07:40,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:07:40" (1/1) ... [2023-04-03 02:07:40,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:07:40,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:07:40,893 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/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c[65677,65690] [2023-04-03 02:07:40,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:07:40,927 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:07:41,029 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/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c[65677,65690] [2023-04-03 02:07:41,029 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:07:41,044 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:07:41,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:41 WrapperNode [2023-04-03 02:07:41,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:07:41,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:07:41,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:07:41,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:07:41,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:41" (1/1) ... [2023-04-03 02:07:41,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:41" (1/1) ... [2023-04-03 02:07:41,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:41" (1/1) ... [2023-04-03 02:07:41,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:41" (1/1) ... [2023-04-03 02:07:41,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:41" (1/1) ... [2023-04-03 02:07:41,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:41" (1/1) ... [2023-04-03 02:07:41,160 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:41" (1/1) ... [2023-04-03 02:07:41,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:41" (1/1) ... [2023-04-03 02:07:41,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:07:41,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:07:41,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:07:41,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:07:41,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:41" (1/1) ... [2023-04-03 02:07:41,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:07:41,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:07:41,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:07:41,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:07:41,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:07:41,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:07:41,235 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:07:41,235 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:07:41,235 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 02:07:41,235 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 02:07:41,235 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 02:07:41,235 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 02:07:41,235 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-03 02:07:41,236 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 02:07:41,236 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 02:07:41,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:07:41,236 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 02:07:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:07:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:07:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:07:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:07:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:07:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:07:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:07:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:07:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:07:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:07:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:07:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:07:41,421 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:07:41,422 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:07:42,563 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:07:43,659 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:07:43,659 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 02:07:43,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:07:43 BoogieIcfgContainer [2023-04-03 02:07:43,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:07:43,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:07:43,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:07:43,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:07:43,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:07:40" (1/3) ... [2023-04-03 02:07:43,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1611e17c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:07:43, skipping insertion in model container [2023-04-03 02:07:43,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:41" (2/3) ... [2023-04-03 02:07:43,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1611e17c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:07:43, skipping insertion in model container [2023-04-03 02:07:43,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:07:43" (3/3) ... [2023-04-03 02:07:43,669 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c [2023-04-03 02:07:43,683 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:07:43,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:07:43,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:07:43,736 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;@336a0d1b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:07:43,736 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:07:43,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 478 states, 454 states have (on average 1.6938325991189427) internal successors, (769), 456 states have internal predecessors, (769), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-03 02:07:43,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-03 02:07:43,765 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:43,765 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:07:43,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:43,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:43,772 INFO L85 PathProgramCache]: Analyzing trace with hash 410778463, now seen corresponding path program 1 times [2023-04-03 02:07:43,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:43,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184405342] [2023-04-03 02:07:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:43,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:07:55,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:55,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184405342] [2023-04-03 02:07:55,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184405342] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:55,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:55,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-03 02:07:55,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179180924] [2023-04-03 02:07:55,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:55,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-03 02:07:55,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-03 02:07:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:07:55,405 INFO L87 Difference]: Start difference. First operand has 478 states, 454 states have (on average 1.6938325991189427) internal successors, (769), 456 states have internal predecessors, (769), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:07:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:59,961 INFO L93 Difference]: Finished difference Result 578 states and 929 transitions. [2023-04-03 02:07:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-03 02:07:59,963 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 160 [2023-04-03 02:07:59,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:59,975 INFO L225 Difference]: With dead ends: 578 [2023-04-03 02:07:59,975 INFO L226 Difference]: Without dead ends: 533 [2023-04-03 02:07:59,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2023-04-03 02:07:59,980 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6458 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7173 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6461 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 7363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 7173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:59,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6461 Valid, 142 Invalid, 7363 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [190 Valid, 7173 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-03 02:07:59,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-04-03 02:08:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 509. [2023-04-03 02:08:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6821052631578948) internal successors, (799), 476 states have internal predecessors, (799), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-03 02:08:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 833 transitions. [2023-04-03 02:08:00,082 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 833 transitions. Word has length 160 [2023-04-03 02:08:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:00,082 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 833 transitions. [2023-04-03 02:08:00,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:08:00,083 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 833 transitions. [2023-04-03 02:08:00,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-03 02:08:00,085 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:00,085 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:08:00,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:08:00,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:00,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:00,086 INFO L85 PathProgramCache]: Analyzing trace with hash -123377045, now seen corresponding path program 1 times [2023-04-03 02:08:00,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:00,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661849390] [2023-04-03 02:08:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:00,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:04,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:04,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661849390] [2023-04-03 02:08:04,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661849390] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:04,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:04,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:08:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245468747] [2023-04-03 02:08:04,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:04,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:08:04,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:04,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:08:04,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:08:04,202 INFO L87 Difference]: Start difference. First operand 509 states and 833 transitions. Second operand has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:06,579 INFO L93 Difference]: Finished difference Result 589 states and 935 transitions. [2023-04-03 02:08:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:08:06,580 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 161 [2023-04-03 02:08:06,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:06,583 INFO L225 Difference]: With dead ends: 589 [2023-04-03 02:08:06,583 INFO L226 Difference]: Without dead ends: 540 [2023-04-03 02:08:06,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:08:06,585 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 847 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 5520 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 5558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 5520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:06,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 96 Invalid, 5558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 5520 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-03 02:08:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-04-03 02:08:06,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 509. [2023-04-03 02:08:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.68) internal successors, (798), 476 states have internal predecessors, (798), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:08:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 831 transitions. [2023-04-03 02:08:06,616 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 831 transitions. Word has length 161 [2023-04-03 02:08:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:06,616 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 831 transitions. [2023-04-03 02:08:06,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 831 transitions. [2023-04-03 02:08:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-03 02:08:06,618 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:06,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:08:06,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:08:06,618 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:06,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:06,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1604382792, now seen corresponding path program 1 times [2023-04-03 02:08:06,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:06,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523286038] [2023-04-03 02:08:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:06,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:10,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:10,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523286038] [2023-04-03 02:08:10,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523286038] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:10,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:10,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:08:10,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630433974] [2023-04-03 02:08:10,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:10,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:08:10,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:10,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:08:10,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:08:10,482 INFO L87 Difference]: Start difference. First operand 509 states and 831 transitions. Second operand has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:12,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:12,912 INFO L93 Difference]: Finished difference Result 583 states and 919 transitions. [2023-04-03 02:08:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:08:12,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 162 [2023-04-03 02:08:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:12,915 INFO L225 Difference]: With dead ends: 583 [2023-04-03 02:08:12,915 INFO L226 Difference]: Without dead ends: 539 [2023-04-03 02:08:12,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:08:12,916 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1642 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6313 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 6355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:12,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 99 Invalid, 6355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 6313 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-03 02:08:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-04-03 02:08:12,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 509. [2023-04-03 02:08:12,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6778947368421053) internal successors, (797), 476 states have internal predecessors, (797), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:08:12,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 830 transitions. [2023-04-03 02:08:12,951 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 830 transitions. Word has length 162 [2023-04-03 02:08:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:12,952 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 830 transitions. [2023-04-03 02:08:12,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 830 transitions. [2023-04-03 02:08:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-03 02:08:12,954 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:12,954 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:08:12,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:08:12,954 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:12,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:12,954 INFO L85 PathProgramCache]: Analyzing trace with hash 437074292, now seen corresponding path program 1 times [2023-04-03 02:08:12,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:12,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913756924] [2023-04-03 02:08:12,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:12,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:16,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:16,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913756924] [2023-04-03 02:08:16,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913756924] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:16,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:16,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:08:16,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756570170] [2023-04-03 02:08:16,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:16,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:08:16,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:16,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:08:16,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:08:16,466 INFO L87 Difference]: Start difference. First operand 509 states and 830 transitions. Second operand has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:18,704 INFO L93 Difference]: Finished difference Result 589 states and 924 transitions. [2023-04-03 02:08:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:08:18,712 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 163 [2023-04-03 02:08:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:18,715 INFO L225 Difference]: With dead ends: 589 [2023-04-03 02:08:18,715 INFO L226 Difference]: Without dead ends: 545 [2023-04-03 02:08:18,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:08:18,724 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 857 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 5556 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 5556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:18,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 100 Invalid, 5592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 5556 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-03 02:08:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-04-03 02:08:18,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 509. [2023-04-03 02:08:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6757894736842105) internal successors, (796), 476 states have internal predecessors, (796), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:08:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 829 transitions. [2023-04-03 02:08:18,764 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 829 transitions. Word has length 163 [2023-04-03 02:08:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:18,764 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 829 transitions. [2023-04-03 02:08:18,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 829 transitions. [2023-04-03 02:08:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-03 02:08:18,765 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:18,766 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:08:18,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:08:18,766 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:18,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:18,767 INFO L85 PathProgramCache]: Analyzing trace with hash -283039439, now seen corresponding path program 1 times [2023-04-03 02:08:18,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:18,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39137689] [2023-04-03 02:08:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:18,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:22,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:22,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39137689] [2023-04-03 02:08:22,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39137689] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:22,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:22,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:08:22,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236444183] [2023-04-03 02:08:22,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:22,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:08:22,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:22,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:08:22,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:08:22,309 INFO L87 Difference]: Start difference. First operand 509 states and 829 transitions. Second operand has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:24,527 INFO L93 Difference]: Finished difference Result 595 states and 929 transitions. [2023-04-03 02:08:24,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:08:24,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 164 [2023-04-03 02:08:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:24,529 INFO L225 Difference]: With dead ends: 595 [2023-04-03 02:08:24,529 INFO L226 Difference]: Without dead ends: 551 [2023-04-03 02:08:24,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:08:24,530 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 865 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 5574 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 5620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:24,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 102 Invalid, 5620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5574 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-03 02:08:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-04-03 02:08:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 509. [2023-04-03 02:08:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6736842105263159) internal successors, (795), 476 states have internal predecessors, (795), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:08:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 828 transitions. [2023-04-03 02:08:24,567 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 828 transitions. Word has length 164 [2023-04-03 02:08:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:24,568 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 828 transitions. [2023-04-03 02:08:24,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 828 transitions. [2023-04-03 02:08:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-03 02:08:24,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:24,570 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:08:24,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:08:24,570 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:24,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash -25017219, now seen corresponding path program 1 times [2023-04-03 02:08:24,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:24,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002447921] [2023-04-03 02:08:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:24,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:28,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:28,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002447921] [2023-04-03 02:08:28,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002447921] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:28,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:28,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:08:28,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593983828] [2023-04-03 02:08:28,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:28,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:08:28,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:28,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:08:28,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:08:28,072 INFO L87 Difference]: Start difference. First operand 509 states and 828 transitions. Second operand has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:30,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:30,581 INFO L93 Difference]: Finished difference Result 601 states and 934 transitions. [2023-04-03 02:08:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:08:30,582 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 165 [2023-04-03 02:08:30,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:30,584 INFO L225 Difference]: With dead ends: 601 [2023-04-03 02:08:30,584 INFO L226 Difference]: Without dead ends: 557 [2023-04-03 02:08:30,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:08:30,585 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 859 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6393 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 6419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 6393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:30,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 111 Invalid, 6419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 6393 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-03 02:08:30,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-04-03 02:08:30,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 509. [2023-04-03 02:08:30,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.671578947368421) internal successors, (794), 476 states have internal predecessors, (794), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:08:30,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 827 transitions. [2023-04-03 02:08:30,621 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 827 transitions. Word has length 165 [2023-04-03 02:08:30,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:30,622 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 827 transitions. [2023-04-03 02:08:30,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:30,622 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 827 transitions. [2023-04-03 02:08:30,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-03 02:08:30,623 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:30,623 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:08:30,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:08:30,623 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:30,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:30,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2010247205, now seen corresponding path program 1 times [2023-04-03 02:08:30,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:30,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936973744] [2023-04-03 02:08:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:30,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:37,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:37,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936973744] [2023-04-03 02:08:37,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936973744] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:37,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:37,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-03 02:08:37,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852520557] [2023-04-03 02:08:37,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:37,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:08:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:08:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:08:37,094 INFO L87 Difference]: Start difference. First operand 509 states and 827 transitions. Second operand has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:08:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:42,205 INFO L93 Difference]: Finished difference Result 607 states and 948 transitions. [2023-04-03 02:08:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-03 02:08:42,206 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 167 [2023-04-03 02:08:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:42,214 INFO L225 Difference]: With dead ends: 607 [2023-04-03 02:08:42,214 INFO L226 Difference]: Without dead ends: 559 [2023-04-03 02:08:42,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=569, Invalid=1881, Unknown=0, NotChecked=0, Total=2450 [2023-04-03 02:08:42,216 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 5533 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 8883 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5536 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 9062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 8883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:42,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5536 Valid, 203 Invalid, 9062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 8883 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-03 02:08:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-04-03 02:08:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 513. [2023-04-03 02:08:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 479 states have (on average 1.663883089770355) internal successors, (797), 480 states have internal predecessors, (797), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:08:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 830 transitions. [2023-04-03 02:08:42,261 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 830 transitions. Word has length 167 [2023-04-03 02:08:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:42,261 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 830 transitions. [2023-04-03 02:08:42,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:08:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 830 transitions. [2023-04-03 02:08:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-03 02:08:42,263 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:42,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:08:42,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:08:42,263 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:42,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:42,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2043255384, now seen corresponding path program 1 times [2023-04-03 02:08:42,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:42,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542644877] [2023-04-03 02:08:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:42,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:44,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:44,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542644877] [2023-04-03 02:08:44,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542644877] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:44,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:44,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:08:44,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786057570] [2023-04-03 02:08:44,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:44,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:08:44,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:44,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:08:44,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:08:44,274 INFO L87 Difference]: Start difference. First operand 513 states and 830 transitions. Second operand has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:46,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:46,590 INFO L93 Difference]: Finished difference Result 610 states and 951 transitions. [2023-04-03 02:08:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:08:46,590 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 168 [2023-04-03 02:08:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:46,593 INFO L225 Difference]: With dead ends: 610 [2023-04-03 02:08:46,593 INFO L226 Difference]: Without dead ends: 558 [2023-04-03 02:08:46,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:08:46,594 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 854 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 5682 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 5721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 5682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:46,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 115 Invalid, 5721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 5682 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-03 02:08:46,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2023-04-03 02:08:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 545. [2023-04-03 02:08:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 497 states have (on average 1.6418511066398391) internal successors, (816), 498 states have internal predecessors, (816), 24 states have call successors, (24), 24 states have call predecessors, (24), 23 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2023-04-03 02:08:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 864 transitions. [2023-04-03 02:08:46,643 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 864 transitions. Word has length 168 [2023-04-03 02:08:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:46,643 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 864 transitions. [2023-04-03 02:08:46,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 864 transitions. [2023-04-03 02:08:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-03 02:08:46,649 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:46,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:08:46,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:08:46,650 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:46,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:46,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1615052338, now seen corresponding path program 1 times [2023-04-03 02:08:46,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:46,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214206711] [2023-04-03 02:08:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:46,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:53,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:53,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214206711] [2023-04-03 02:08:53,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214206711] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:53,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:53,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-03 02:08:53,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383893376] [2023-04-03 02:08:53,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:53,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-03 02:08:53,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:53,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-03 02:08:53,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:08:53,698 INFO L87 Difference]: Start difference. First operand 545 states and 864 transitions. Second operand has 23 states, 11 states have (on average 13.636363636363637) internal successors, (150), 13 states have internal predecessors, (150), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:08:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:57,119 INFO L93 Difference]: Finished difference Result 652 states and 991 transitions. [2023-04-03 02:08:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-03 02:08:57,120 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 11 states have (on average 13.636363636363637) internal successors, (150), 13 states have internal predecessors, (150), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 170 [2023-04-03 02:08:57,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:57,122 INFO L225 Difference]: With dead ends: 652 [2023-04-03 02:08:57,122 INFO L226 Difference]: Without dead ends: 571 [2023-04-03 02:08:57,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2023-04-03 02:08:57,123 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 4731 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 5696 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4734 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 5844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 5696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:57,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4734 Valid, 144 Invalid, 5844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 5696 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-03 02:08:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2023-04-03 02:08:57,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 545. [2023-04-03 02:08:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 497 states have (on average 1.6398390342052314) internal successors, (815), 498 states have internal predecessors, (815), 24 states have call successors, (24), 24 states have call predecessors, (24), 23 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2023-04-03 02:08:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 863 transitions. [2023-04-03 02:08:57,175 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 863 transitions. Word has length 170 [2023-04-03 02:08:57,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:57,175 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 863 transitions. [2023-04-03 02:08:57,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 11 states have (on average 13.636363636363637) internal successors, (150), 13 states have internal predecessors, (150), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:08:57,175 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 863 transitions. [2023-04-03 02:08:57,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-04-03 02:08:57,177 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:57,177 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:08:57,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:08:57,177 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:57,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:57,177 INFO L85 PathProgramCache]: Analyzing trace with hash 290251634, now seen corresponding path program 1 times [2023-04-03 02:08:57,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:57,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516046648] [2023-04-03 02:08:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:57,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:09:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:09:00,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:09:00,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516046648] [2023-04-03 02:09:00,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516046648] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:09:00,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:09:00,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 02:09:00,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513699097] [2023-04-03 02:09:00,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:09:00,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 02:09:00,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:09:00,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 02:09:00,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:09:00,935 INFO L87 Difference]: Start difference. First operand 545 states and 863 transitions. Second operand has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-03 02:09:01,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:09:01,571 INFO L93 Difference]: Finished difference Result 580 states and 908 transitions. [2023-04-03 02:09:01,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:09:01,572 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 171 [2023-04-03 02:09:01,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:09:01,574 INFO L225 Difference]: With dead ends: 580 [2023-04-03 02:09:01,575 INFO L226 Difference]: Without dead ends: 578 [2023-04-03 02:09:01,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:09:01,575 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 36 mSDsluCounter, 7934 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 8663 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:09:01,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 8663 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:09:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-04-03 02:09:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 553. [2023-04-03 02:09:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 502 states have (on average 1.6334661354581674) internal successors, (820), 504 states have internal predecessors, (820), 25 states have call successors, (25), 25 states have call predecessors, (25), 25 states have return successors, (26), 23 states have call predecessors, (26), 24 states have call successors, (26) [2023-04-03 02:09:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 871 transitions. [2023-04-03 02:09:01,632 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 871 transitions. Word has length 171 [2023-04-03 02:09:01,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:09:01,632 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 871 transitions. [2023-04-03 02:09:01,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-03 02:09:01,632 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 871 transitions. [2023-04-03 02:09:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-04-03 02:09:01,634 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:09:01,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:09:01,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:09:01,634 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:09:01,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:09:01,635 INFO L85 PathProgramCache]: Analyzing trace with hash 862324658, now seen corresponding path program 1 times [2023-04-03 02:09:01,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:09:01,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835688849] [2023-04-03 02:09:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:09:01,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:09:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:10:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:10:20,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:10:20,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835688849] [2023-04-03 02:10:20,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835688849] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:10:20,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60447866] [2023-04-03 02:10:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:10:20,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:10:20,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:10:20,806 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:10:20,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:10:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:10:21,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 2507 conjuncts, 113 conjunts are in the unsatisfiable core [2023-04-03 02:10:21,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:11:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:11:12,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:11:13,353 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 39519 disjunctions. This might take some time...