/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.4.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:21:08,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:21:08,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:21:08,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:21:08,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:21:08,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:21:08,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:21:08,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:21:08,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:21:08,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:21:08,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:21:08,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:21:08,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:21:08,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:21:08,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:21:08,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:21:08,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:21:08,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:21:08,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:21:08,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:21:08,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:21:08,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:21:08,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:21:08,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:21:08,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:21:08,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:21:08,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:21:08,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:21:08,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:21:08,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:21:08,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:21:08,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:21:08,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:21:08,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:21:08,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:21:08,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:21:08,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:21:08,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:21:08,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:21:08,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:21:08,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:21:08,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:21:08,250 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:21:08,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:21:08,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:21:08,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:21:08,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:21:08,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:21:08,251 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:21:08,251 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:21:08,251 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:21:08,251 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:21:08,251 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:21:08,251 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:21:08,251 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:21:08,251 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:21:08,251 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:21:08,252 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:21:08,252 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:21:08,252 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:21:08,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:21:08,252 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:21:08,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:21:08,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:21:08,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:21:08,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:21:08,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:21:08,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:21:08,255 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:21:08,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:21:08,255 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:21:08,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:21:08,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:21:08,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:21:08,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:21:08,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:21:08,256 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:21:08,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:21:08,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:21:08,257 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:21:08,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:21:08,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:21:08,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:21:08,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:21:08,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:21:08,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:21:08,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:21:08,459 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:21:08,460 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:21:08,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c [2023-04-01 06:21:09,514 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:21:09,700 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:21:09,700 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c [2023-04-01 06:21:09,712 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9670a360/3119456ce24d4062837525a9684e98f8/FLAG0ffc5ceb3 [2023-04-01 06:21:09,726 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9670a360/3119456ce24d4062837525a9684e98f8 [2023-04-01 06:21:09,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:21:09,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:21:09,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:21:09,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:21:09,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:21:09,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:21:09" (1/1) ... [2023-04-01 06:21:09,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463b9ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:09, skipping insertion in model container [2023-04-01 06:21:09,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:21:09" (1/1) ... [2023-04-01 06:21:09,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:21:09,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:21:10,033 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.4.ufo.BOUNDED-8.pals.c[30996,31009] [2023-04-01 06:21:10,035 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:21:10,043 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:21:10,126 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.4.ufo.BOUNDED-8.pals.c[30996,31009] [2023-04-01 06:21:10,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:21:10,138 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:21:10,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:10 WrapperNode [2023-04-01 06:21:10,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:21:10,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:21:10,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:21:10,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:21:10,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:10" (1/1) ... [2023-04-01 06:21:10,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:10" (1/1) ... [2023-04-01 06:21:10,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:10" (1/1) ... [2023-04-01 06:21:10,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:10" (1/1) ... [2023-04-01 06:21:10,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:10" (1/1) ... [2023-04-01 06:21:10,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:10" (1/1) ... [2023-04-01 06:21:10,194 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:10" (1/1) ... [2023-04-01 06:21:10,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:10" (1/1) ... [2023-04-01 06:21:10,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:21:10,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:21:10,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:21:10,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:21:10,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:10" (1/1) ... [2023-04-01 06:21:10,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:21:10,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:21:10,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:21:10,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:21:10,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:21:10,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:21:10,294 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:21:10,294 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:21:10,295 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 06:21:10,295 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 06:21:10,295 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 06:21:10,295 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 06:21:10,295 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 06:21:10,295 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 06:21:10,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:21:10,295 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 06:21:10,295 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:21:10,295 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:21:10,295 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:21:10,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:21:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:21:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:21:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:21:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:21:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:21:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:21:10,384 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:21:10,385 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:21:10,997 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:21:11,516 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:21:11,516 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 06:21:11,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:21:11 BoogieIcfgContainer [2023-04-01 06:21:11,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:21:11,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:21:11,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:21:11,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:21:11,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:21:09" (1/3) ... [2023-04-01 06:21:11,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7033be14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:21:11, skipping insertion in model container [2023-04-01 06:21:11,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:10" (2/3) ... [2023-04-01 06:21:11,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7033be14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:21:11, skipping insertion in model container [2023-04-01 06:21:11,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:21:11" (3/3) ... [2023-04-01 06:21:11,526 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c [2023-04-01 06:21:11,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:21:11,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:21:11,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:21:11,581 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;@54be1428, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:21:11,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:21:11,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 06:21:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 06:21:11,596 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:21:11,597 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] [2023-04-01 06:21:11,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:21:11,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:21:11,602 INFO L85 PathProgramCache]: Analyzing trace with hash -968827168, now seen corresponding path program 1 times [2023-04-01 06:21:11,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:21:11,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772292497] [2023-04-01 06:21:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:21:11,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:21:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:21:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:21:16,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:21:16,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772292497] [2023-04-01 06:21:16,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772292497] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:21:16,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:21:16,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 06:21:16,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130196329] [2023-04-01 06:21:16,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:21:16,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 06:21:16,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:21:16,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 06:21:16,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 06:21:16,323 INFO L87 Difference]: Start difference. First operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:21:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:21:17,721 INFO L93 Difference]: Finished difference Result 254 states and 357 transitions. [2023-04-01 06:21:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 06:21:17,722 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 85 [2023-04-01 06:21:17,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:21:17,729 INFO L225 Difference]: With dead ends: 254 [2023-04-01 06:21:17,729 INFO L226 Difference]: Without dead ends: 203 [2023-04-01 06:21:17,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 06:21:17,734 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1743 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1746 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:21:17,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1746 Valid, 165 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 06:21:17,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-04-01 06:21:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 191. [2023-04-01 06:21:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 161 states have (on average 1.5217391304347827) internal successors, (245), 162 states have internal predecessors, (245), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-01 06:21:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2023-04-01 06:21:17,771 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 85 [2023-04-01 06:21:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:21:17,771 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2023-04-01 06:21:17,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:21:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2023-04-01 06:21:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 06:21:17,774 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:21:17,774 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] [2023-04-01 06:21:17,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:21:17,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:21:17,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:21:17,775 INFO L85 PathProgramCache]: Analyzing trace with hash 651378341, now seen corresponding path program 1 times [2023-04-01 06:21:17,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:21:17,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785155052] [2023-04-01 06:21:17,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:21:17,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:21:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:21:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:21:19,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:21:19,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785155052] [2023-04-01 06:21:19,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785155052] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:21:19,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:21:19,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:21:19,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909193432] [2023-04-01 06:21:19,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:21:19,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:21:19,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:21:19,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:21:19,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:21:19,761 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:21:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:21:20,687 INFO L93 Difference]: Finished difference Result 271 states and 378 transitions. [2023-04-01 06:21:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:21:20,688 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2023-04-01 06:21:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:21:20,693 INFO L225 Difference]: With dead ends: 271 [2023-04-01 06:21:20,693 INFO L226 Difference]: Without dead ends: 230 [2023-04-01 06:21:20,696 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 [2023-04-01 06:21:20,698 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 569 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:21:20,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 98 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:21:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-04-01 06:21:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 202. [2023-04-01 06:21:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5406976744186047) internal successors, (265), 173 states have internal predecessors, (265), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:21:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 294 transitions. [2023-04-01 06:21:20,734 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 294 transitions. Word has length 86 [2023-04-01 06:21:20,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:21:20,736 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 294 transitions. [2023-04-01 06:21:20,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:21:20,736 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 294 transitions. [2023-04-01 06:21:20,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 06:21:20,742 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:21:20,743 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] [2023-04-01 06:21:20,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:21:20,743 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:21:20,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:21:20,743 INFO L85 PathProgramCache]: Analyzing trace with hash 444852969, now seen corresponding path program 1 times [2023-04-01 06:21:20,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:21:20,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991618048] [2023-04-01 06:21:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:21:20,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:21:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:21:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:21:22,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:21:22,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991618048] [2023-04-01 06:21:22,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991618048] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:21:22,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:21:22,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:21:22,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8005517] [2023-04-01 06:21:22,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:21:22,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:21:22,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:21:22,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:21:22,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:21:22,758 INFO L87 Difference]: Start difference. First operand 202 states and 294 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:21:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:21:23,770 INFO L93 Difference]: Finished difference Result 275 states and 380 transitions. [2023-04-01 06:21:23,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:21:23,771 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-04-01 06:21:23,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:21:23,772 INFO L225 Difference]: With dead ends: 275 [2023-04-01 06:21:23,772 INFO L226 Difference]: Without dead ends: 234 [2023-04-01 06:21:23,773 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 [2023-04-01 06:21:23,773 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 572 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 06:21:23,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 109 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 06:21:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-04-01 06:21:23,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 202. [2023-04-01 06:21:23,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5348837209302326) internal successors, (264), 173 states have internal predecessors, (264), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:21:23,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 293 transitions. [2023-04-01 06:21:23,789 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 293 transitions. Word has length 87 [2023-04-01 06:21:23,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:21:23,789 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 293 transitions. [2023-04-01 06:21:23,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:21:23,790 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 293 transitions. [2023-04-01 06:21:23,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 06:21:23,790 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:21:23,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:21:23,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:21:23,791 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:21:23,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:21:23,791 INFO L85 PathProgramCache]: Analyzing trace with hash -555754866, now seen corresponding path program 1 times [2023-04-01 06:21:23,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:21:23,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509009562] [2023-04-01 06:21:23,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:21:23,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:21:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:21:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:21:25,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:21:25,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509009562] [2023-04-01 06:21:25,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509009562] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:21:25,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:21:25,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:21:25,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358606611] [2023-04-01 06:21:25,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:21:25,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:21:25,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:21:25,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:21:25,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:21:25,580 INFO L87 Difference]: Start difference. First operand 202 states and 293 transitions. Second operand has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:21:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:21:26,660 INFO L93 Difference]: Finished difference Result 281 states and 385 transitions. [2023-04-01 06:21:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:21:26,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2023-04-01 06:21:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:21:26,662 INFO L225 Difference]: With dead ends: 281 [2023-04-01 06:21:26,662 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 06:21:26,663 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 [2023-04-01 06:21:26,663 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 317 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:21:26,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 119 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 06:21:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 06:21:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2023-04-01 06:21:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5290697674418605) internal successors, (263), 173 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:21:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 292 transitions. [2023-04-01 06:21:26,686 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 292 transitions. Word has length 88 [2023-04-01 06:21:26,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:21:26,687 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 292 transitions. [2023-04-01 06:21:26,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:21:26,687 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 292 transitions. [2023-04-01 06:21:26,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 06:21:26,688 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:21:26,688 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] [2023-04-01 06:21:26,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:21:26,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:21:26,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:21:26,688 INFO L85 PathProgramCache]: Analyzing trace with hash -403115278, now seen corresponding path program 1 times [2023-04-01 06:21:26,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:21:26,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311190396] [2023-04-01 06:21:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:21:26,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:21:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:21:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:21:28,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:21:28,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311190396] [2023-04-01 06:21:28,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311190396] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:21:28,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:21:28,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:21:28,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980622674] [2023-04-01 06:21:28,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:21:28,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:21:28,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:21:28,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:21:28,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:21:28,343 INFO L87 Difference]: Start difference. First operand 202 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:21:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:21:29,236 INFO L93 Difference]: Finished difference Result 287 states and 390 transitions. [2023-04-01 06:21:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:21:29,236 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 89 [2023-04-01 06:21:29,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:21:29,238 INFO L225 Difference]: With dead ends: 287 [2023-04-01 06:21:29,238 INFO L226 Difference]: Without dead ends: 246 [2023-04-01 06:21:29,238 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 [2023-04-01 06:21:29,239 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 581 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:21:29,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 104 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:21:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-04-01 06:21:29,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 202. [2023-04-01 06:21:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5232558139534884) internal successors, (262), 173 states have internal predecessors, (262), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:21:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 291 transitions. [2023-04-01 06:21:29,254 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 291 transitions. Word has length 89 [2023-04-01 06:21:29,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:21:29,255 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 291 transitions. [2023-04-01 06:21:29,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:21:29,255 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 291 transitions. [2023-04-01 06:21:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 06:21:29,255 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:21:29,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:21:29,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:21:29,256 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:21:29,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:21:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash 171793306, now seen corresponding path program 1 times [2023-04-01 06:21:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:21:29,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560003816] [2023-04-01 06:21:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:21:29,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:21:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:21:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:21:32,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:21:32,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560003816] [2023-04-01 06:21:32,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560003816] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:21:32,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:21:32,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-01 06:21:32,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18687409] [2023-04-01 06:21:32,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:21:32,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 06:21:32,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:21:32,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 06:21:32,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-01 06:21:32,115 INFO L87 Difference]: Start difference. First operand 202 states and 291 transitions. Second operand has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:21:33,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:21:33,917 INFO L93 Difference]: Finished difference Result 356 states and 483 transitions. [2023-04-01 06:21:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 06:21:33,917 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 91 [2023-04-01 06:21:33,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:21:33,919 INFO L225 Difference]: With dead ends: 356 [2023-04-01 06:21:33,919 INFO L226 Difference]: Without dead ends: 311 [2023-04-01 06:21:33,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 06:21:33,920 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1718 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:21:33,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1723 Valid, 192 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 06:21:33,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-04-01 06:21:33,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 250. [2023-04-01 06:21:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 205 states have (on average 1.4780487804878049) internal successors, (303), 209 states have internal predecessors, (303), 21 states have call successors, (21), 21 states have call predecessors, (21), 23 states have return successors, (25), 19 states have call predecessors, (25), 20 states have call successors, (25) [2023-04-01 06:21:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 349 transitions. [2023-04-01 06:21:33,962 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 349 transitions. Word has length 91 [2023-04-01 06:21:33,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:21:33,962 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 349 transitions. [2023-04-01 06:21:33,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:21:33,962 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 349 transitions. [2023-04-01 06:21:33,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 06:21:33,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:21:33,963 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] [2023-04-01 06:21:33,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:21:33,963 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:21:33,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:21:33,964 INFO L85 PathProgramCache]: Analyzing trace with hash 580361477, now seen corresponding path program 1 times [2023-04-01 06:21:33,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:21:33,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061271704] [2023-04-01 06:21:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:21:33,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:21:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:21:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:21:34,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:21:34,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061271704] [2023-04-01 06:21:34,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061271704] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:21:34,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:21:34,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:21:34,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426266437] [2023-04-01 06:21:34,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:21:34,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:21:34,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:21:34,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:21:34,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:21:34,789 INFO L87 Difference]: Start difference. First operand 250 states and 349 transitions. Second operand has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:21:35,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:21:35,661 INFO L93 Difference]: Finished difference Result 323 states and 436 transitions. [2023-04-01 06:21:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:21:35,662 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2023-04-01 06:21:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:21:35,663 INFO L225 Difference]: With dead ends: 323 [2023-04-01 06:21:35,663 INFO L226 Difference]: Without dead ends: 232 [2023-04-01 06:21:35,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:21:35,664 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 297 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:21:35,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 114 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:21:35,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-01 06:21:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 203. [2023-04-01 06:21:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 173 states have (on average 1.4797687861271676) internal successors, (256), 174 states have internal predecessors, (256), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:21:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 285 transitions. [2023-04-01 06:21:35,684 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 285 transitions. Word has length 92 [2023-04-01 06:21:35,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:21:35,684 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 285 transitions. [2023-04-01 06:21:35,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:21:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 285 transitions. [2023-04-01 06:21:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 06:21:35,685 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:21:35,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:21:35,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:21:35,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:21:35,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:21:35,685 INFO L85 PathProgramCache]: Analyzing trace with hash -728523733, now seen corresponding path program 1 times [2023-04-01 06:21:35,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:21:35,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154334783] [2023-04-01 06:21:35,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:21:35,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:21:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:21:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:21:38,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:21:38,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154334783] [2023-04-01 06:21:38,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154334783] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:21:38,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:21:38,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-01 06:21:38,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808179029] [2023-04-01 06:21:38,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:21:38,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 06:21:38,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:21:38,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 06:21:38,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-01 06:21:38,542 INFO L87 Difference]: Start difference. First operand 203 states and 285 transitions. Second operand has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:21:40,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:21:40,280 INFO L93 Difference]: Finished difference Result 306 states and 401 transitions. [2023-04-01 06:21:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 06:21:40,281 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 94 [2023-04-01 06:21:40,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:21:40,282 INFO L225 Difference]: With dead ends: 306 [2023-04-01 06:21:40,282 INFO L226 Difference]: Without dead ends: 263 [2023-04-01 06:21:40,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 06:21:40,284 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1325 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:21:40,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 184 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 06:21:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-04-01 06:21:40,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 203. [2023-04-01 06:21:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 173 states have (on average 1.4739884393063585) internal successors, (255), 174 states have internal predecessors, (255), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:21:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 284 transitions. [2023-04-01 06:21:40,351 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 284 transitions. Word has length 94 [2023-04-01 06:21:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:21:40,351 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 284 transitions. [2023-04-01 06:21:40,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:21:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 284 transitions. [2023-04-01 06:21:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 06:21:40,354 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:21:40,354 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] [2023-04-01 06:21:40,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:21:40,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:21:40,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:21:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash -729613776, now seen corresponding path program 1 times [2023-04-01 06:21:40,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:21:40,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555319273] [2023-04-01 06:21:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:21:40,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:21:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:21:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:21:41,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:21:41,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555319273] [2023-04-01 06:21:41,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555319273] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:21:41,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:21:41,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 06:21:41,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036919512] [2023-04-01 06:21:41,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:21:41,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 06:21:41,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:21:41,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 06:21:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-01 06:21:41,972 INFO L87 Difference]: Start difference. First operand 203 states and 284 transitions. Second operand has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 06:21:42,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:21:42,375 INFO L93 Difference]: Finished difference Result 242 states and 332 transitions. [2023-04-01 06:21:42,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 06:21:42,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-04-01 06:21:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:21:42,376 INFO L225 Difference]: With dead ends: 242 [2023-04-01 06:21:42,376 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 06:21:42,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-01 06:21:42,377 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 40 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:21:42,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2696 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:21:42,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 06:21:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 212. [2023-04-01 06:21:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.458100558659218) internal successors, (261), 181 states have internal predecessors, (261), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 06:21:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 293 transitions. [2023-04-01 06:21:42,405 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 293 transitions. Word has length 95 [2023-04-01 06:21:42,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:21:42,406 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 293 transitions. [2023-04-01 06:21:42,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 06:21:42,406 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 293 transitions. [2023-04-01 06:21:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 06:21:42,406 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:21:42,406 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:21:42,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:21:42,407 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:21:42,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:21:42,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1321743943, now seen corresponding path program 1 times [2023-04-01 06:21:42,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:21:42,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251073086] [2023-04-01 06:21:42,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:21:42,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:21:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:21:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 06:21:47,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:21:47,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251073086] [2023-04-01 06:21:47,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251073086] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:21:47,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283747037] [2023-04-01 06:21:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:21:47,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:21:47,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:21:47,890 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:21:47,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 06:21:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:21:48,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 100 conjunts are in the unsatisfiable core [2023-04-01 06:21:48,238 INFO L285 TraceCheckSpWp]: Computing forward predicates...