/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_floodmax.3.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:35:51,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:35:51,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:35:51,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:35:51,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:35:51,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:35:51,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:35:51,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:35:51,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:35:51,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:35:51,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:35:51,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:35:51,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:35:51,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:35:51,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:35:51,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:35:51,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:35:51,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:35:51,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:35:51,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:35:51,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:35:51,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:35:51,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:35:51,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:35:51,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:35:51,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:35:51,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:35:51,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:35:51,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:35:51,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:35:51,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:35:51,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:35:51,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:35:51,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:35:51,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:35:51,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:35:51,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:35:51,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:35:51,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:35:51,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:35:51,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:35:51,189 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 01:35:51,220 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:35:51,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:35:51,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:35:51,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:35:51,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:35:51,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:35:51,222 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:35:51,222 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:35:51,222 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:35:51,222 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:35:51,223 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:35:51,223 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:35:51,223 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:35:51,223 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:35:51,223 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:35:51,224 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:35:51,224 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:35:51,224 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:35:51,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:35:51,224 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:35:51,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:35:51,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:35:51,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:35:51,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:35:51,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:35:51,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:35:51,225 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:35:51,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:35:51,226 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:35:51,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:35:51,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:35:51,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:35:51,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:35:51,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:35:51,227 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:35:51,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:35:51,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:35:51,227 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:35:51,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:35:51,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:35:51,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:35:51,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:35:51,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:35:51,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:35:51,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:35:51,488 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:35:51,489 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:35:51,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c [2023-04-03 01:35:52,605 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:35:52,792 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:35:52,793 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c [2023-04-03 01:35:52,801 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0014cbc3/59865abf8a214c9a81da40e978773586/FLAG863be6efc [2023-04-03 01:35:52,812 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0014cbc3/59865abf8a214c9a81da40e978773586 [2023-04-03 01:35:52,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:35:52,816 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:35:52,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:35:52,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:35:52,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:35:52,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:35:52" (1/1) ... [2023-04-03 01:35:52,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3028fb62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:35:52, skipping insertion in model container [2023-04-03 01:35:52,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:35:52" (1/1) ... [2023-04-03 01:35:52,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:35:52,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:35:53,021 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_floodmax.3.ufo.UNBOUNDED.pals.c[12966,12979] [2023-04-03 01:35:53,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:35:53,034 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:35:53,085 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_floodmax.3.ufo.UNBOUNDED.pals.c[12966,12979] [2023-04-03 01:35:53,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:35:53,105 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:35:53,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:35:53 WrapperNode [2023-04-03 01:35:53,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:35:53,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:35:53,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:35:53,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:35:53,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:35:53" (1/1) ... [2023-04-03 01:35:53,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:35:53" (1/1) ... [2023-04-03 01:35:53,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:35:53" (1/1) ... [2023-04-03 01:35:53,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:35:53" (1/1) ... [2023-04-03 01:35:53,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:35:53" (1/1) ... [2023-04-03 01:35:53,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:35:53" (1/1) ... [2023-04-03 01:35:53,161 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:35:53" (1/1) ... [2023-04-03 01:35:53,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:35:53" (1/1) ... [2023-04-03 01:35:53,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:35:53,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:35:53,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:35:53,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:35:53,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:35:53" (1/1) ... [2023-04-03 01:35:53,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:35:53,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:35:53,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 01:35:53,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 01:35:53,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:35:53,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:35:53,258 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:35:53,259 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:35:53,259 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 01:35:53,260 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 01:35:53,260 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 01:35:53,260 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:35:53,260 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:35:53,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:35:53,260 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:35:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:35:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:35:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:35:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:35:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:35:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 01:35:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:35:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:35:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:35:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:35:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:35:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 01:35:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 01:35:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 01:35:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:35:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:35:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:35:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:35:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:35:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:35:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:35:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:35:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:35:53,371 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:35:53,373 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:35:53,940 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:35:54,350 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:35:54,350 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:35:54,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:35:54 BoogieIcfgContainer [2023-04-03 01:35:54,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:35:54,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:35:54,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:35:54,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:35:54,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:35:52" (1/3) ... [2023-04-03 01:35:54,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73356d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:35:54, skipping insertion in model container [2023-04-03 01:35:54,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:35:53" (2/3) ... [2023-04-03 01:35:54,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73356d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:35:54, skipping insertion in model container [2023-04-03 01:35:54,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:35:54" (3/3) ... [2023-04-03 01:35:54,361 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c [2023-04-03 01:35:54,376 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:35:54,376 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:35:54,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:35:54,427 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;@180209bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:35:54,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:35:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 32 states have internal predecessors, (43), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 01:35:54,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-03 01:35:54,436 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:35:54,437 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] [2023-04-03 01:35:54,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:35:54,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:35:54,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2069377630, now seen corresponding path program 1 times [2023-04-03 01:35:54,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:35:54,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406709903] [2023-04-03 01:35:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:35:54,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:35:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:35:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:35:58,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:35:58,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406709903] [2023-04-03 01:35:58,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406709903] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:35:58,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:35:58,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 01:35:58,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180478624] [2023-04-03 01:35:58,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:35:58,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 01:35:58,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:35:58,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 01:35:58,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:35:58,124 INFO L87 Difference]: Start difference. First operand has 50 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 32 states have internal predecessors, (43), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 01:35:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:35:59,018 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2023-04-03 01:35:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 01:35:59,021 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 34 [2023-04-03 01:35:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:35:59,028 INFO L225 Difference]: With dead ends: 111 [2023-04-03 01:35:59,028 INFO L226 Difference]: Without dead ends: 74 [2023-04-03 01:35:59,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2023-04-03 01:35:59,033 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 174 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:35:59,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 136 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:35:59,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-04-03 01:35:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2023-04-03 01:35:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 01:35:59,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2023-04-03 01:35:59,087 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 34 [2023-04-03 01:35:59,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:35:59,088 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2023-04-03 01:35:59,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 01:35:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2023-04-03 01:35:59,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-03 01:35:59,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:35:59,090 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] [2023-04-03 01:35:59,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:35:59,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:35:59,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:35:59,091 INFO L85 PathProgramCache]: Analyzing trace with hash -401666627, now seen corresponding path program 1 times [2023-04-03 01:35:59,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:35:59,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235649594] [2023-04-03 01:35:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:35:59,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:35:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:36:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:36:00,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:36:00,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235649594] [2023-04-03 01:36:00,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235649594] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:36:00,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:36:00,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:36:00,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951345563] [2023-04-03 01:36:00,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:36:00,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:36:00,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:36:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:36:00,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:36:00,483 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:36:00,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:36:00,879 INFO L93 Difference]: Finished difference Result 124 states and 149 transitions. [2023-04-03 01:36:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:36:00,880 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 35 [2023-04-03 01:36:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:36:00,881 INFO L225 Difference]: With dead ends: 124 [2023-04-03 01:36:00,881 INFO L226 Difference]: Without dead ends: 88 [2023-04-03 01:36:00,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:36:00,883 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:36:00,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 95 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:36:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-03 01:36:00,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2023-04-03 01:36:00,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 39 states have internal predecessors, (49), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 01:36:00,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2023-04-03 01:36:00,900 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 35 [2023-04-03 01:36:00,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:36:00,900 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2023-04-03 01:36:00,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:36:00,900 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2023-04-03 01:36:00,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-03 01:36:00,901 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:36:00,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:36:00,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:36:00,902 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:36:00,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:36:00,902 INFO L85 PathProgramCache]: Analyzing trace with hash 864478315, now seen corresponding path program 1 times [2023-04-03 01:36:00,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:36:00,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476845576] [2023-04-03 01:36:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:36:00,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:36:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:36:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:36:02,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:36:02,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476845576] [2023-04-03 01:36:02,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476845576] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:36:02,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:36:02,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:36:02,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440750187] [2023-04-03 01:36:02,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:36:02,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:36:02,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:36:02,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:36:02,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:36:02,197 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:36:02,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:36:02,627 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2023-04-03 01:36:02,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:36:02,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 36 [2023-04-03 01:36:02,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:36:02,629 INFO L225 Difference]: With dead ends: 131 [2023-04-03 01:36:02,629 INFO L226 Difference]: Without dead ends: 95 [2023-04-03 01:36:02,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:36:02,631 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 97 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:36:02,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 94 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:36:02,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-03 01:36:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 65. [2023-04-03 01:36:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 40 states have internal predecessors, (50), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 01:36:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2023-04-03 01:36:02,650 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 36 [2023-04-03 01:36:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:36:02,651 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2023-04-03 01:36:02,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:36:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2023-04-03 01:36:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-03 01:36:02,654 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:36:02,654 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] [2023-04-03 01:36:02,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:36:02,654 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:36:02,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:36:02,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1727990042, now seen corresponding path program 1 times [2023-04-03 01:36:02,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:36:02,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074826900] [2023-04-03 01:36:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:36:02,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:36:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:36:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:36:03,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:36:03,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074826900] [2023-04-03 01:36:03,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074826900] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:36:03,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:36:03,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:36:03,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514397603] [2023-04-03 01:36:03,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:36:03,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:36:03,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:36:03,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:36:03,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:36:03,922 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:36:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:36:04,378 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2023-04-03 01:36:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:36:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2023-04-03 01:36:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:36:04,379 INFO L225 Difference]: With dead ends: 138 [2023-04-03 01:36:04,380 INFO L226 Difference]: Without dead ends: 102 [2023-04-03 01:36:04,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:36:04,381 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 102 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:36:04,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 96 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:36:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-03 01:36:04,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 66. [2023-04-03 01:36:04,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 01:36:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2023-04-03 01:36:04,406 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 37 [2023-04-03 01:36:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:36:04,407 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2023-04-03 01:36:04,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:36:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2023-04-03 01:36:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-03 01:36:04,409 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:36:04,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:36:04,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:36:04,409 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:36:04,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:36:04,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1290897234, now seen corresponding path program 1 times [2023-04-03 01:36:04,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:36:04,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666333941] [2023-04-03 01:36:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:36:04,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:36:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:36:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:36:06,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:36:06,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666333941] [2023-04-03 01:36:06,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666333941] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:36:06,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:36:06,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 01:36:06,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432813819] [2023-04-03 01:36:06,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:36:06,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 01:36:06,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:36:06,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 01:36:06,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-04-03 01:36:06,314 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 01:36:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:36:07,444 INFO L93 Difference]: Finished difference Result 192 states and 235 transitions. [2023-04-03 01:36:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-03 01:36:07,445 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2023-04-03 01:36:07,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:36:07,447 INFO L225 Difference]: With dead ends: 192 [2023-04-03 01:36:07,447 INFO L226 Difference]: Without dead ends: 156 [2023-04-03 01:36:07,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2023-04-03 01:36:07,449 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 566 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:36:07,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 133 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:36:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-04-03 01:36:07,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 102. [2023-04-03 01:36:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.28125) internal successors, (82), 67 states have internal predecessors, (82), 18 states have call successors, (18), 18 states have call predecessors, (18), 19 states have return successors, (23), 16 states have call predecessors, (23), 17 states have call successors, (23) [2023-04-03 01:36:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2023-04-03 01:36:07,493 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 39 [2023-04-03 01:36:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:36:07,493 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2023-04-03 01:36:07,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 01:36:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2023-04-03 01:36:07,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-03 01:36:07,499 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:36:07,499 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] [2023-04-03 01:36:07,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 01:36:07,499 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:36:07,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:36:07,500 INFO L85 PathProgramCache]: Analyzing trace with hash 79164578, now seen corresponding path program 1 times [2023-04-03 01:36:07,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:36:07,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150330082] [2023-04-03 01:36:07,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:36:07,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:36:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:36:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:36:08,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:36:08,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150330082] [2023-04-03 01:36:08,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150330082] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:36:08,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:36:08,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:36:08,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264916644] [2023-04-03 01:36:08,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:36:08,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:36:08,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:36:08,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:36:08,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:36:08,706 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:36:09,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:36:09,217 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2023-04-03 01:36:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 01:36:09,218 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2023-04-03 01:36:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:36:09,220 INFO L225 Difference]: With dead ends: 218 [2023-04-03 01:36:09,220 INFO L226 Difference]: Without dead ends: 146 [2023-04-03 01:36:09,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-03 01:36:09,226 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 163 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:36:09,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 100 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:36:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-04-03 01:36:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2023-04-03 01:36:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 68 states have internal predecessors, (81), 18 states have call successors, (18), 18 states have call predecessors, (18), 18 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) [2023-04-03 01:36:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2023-04-03 01:36:09,258 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 40 [2023-04-03 01:36:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:36:09,259 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2023-04-03 01:36:09,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 01:36:09,260 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2023-04-03 01:36:09,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-03 01:36:09,261 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:36:09,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:36:09,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 01:36:09,261 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:36:09,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:36:09,262 INFO L85 PathProgramCache]: Analyzing trace with hash -910768472, now seen corresponding path program 1 times [2023-04-03 01:36:09,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:36:09,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394763957] [2023-04-03 01:36:09,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:36:09,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:36:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:36:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:36:11,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:36:11,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394763957] [2023-04-03 01:36:11,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394763957] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:36:11,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:36:11,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 01:36:11,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708826931] [2023-04-03 01:36:11,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:36:11,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 01:36:11,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:36:11,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 01:36:11,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-04-03 01:36:11,476 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 20 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-03 01:36:13,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:36:13,209 INFO L93 Difference]: Finished difference Result 226 states and 259 transitions. [2023-04-03 01:36:13,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-03 01:36:13,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 42 [2023-04-03 01:36:13,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:36:13,210 INFO L225 Difference]: With dead ends: 226 [2023-04-03 01:36:13,211 INFO L226 Difference]: Without dead ends: 159 [2023-04-03 01:36:13,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=476, Invalid=2074, Unknown=0, NotChecked=0, Total=2550 [2023-04-03 01:36:13,212 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 393 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:36:13,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 114 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:36:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-04-03 01:36:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 103. [2023-04-03 01:36:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 68 states have internal predecessors, (80), 18 states have call successors, (18), 18 states have call predecessors, (18), 18 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) [2023-04-03 01:36:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2023-04-03 01:36:13,245 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 42 [2023-04-03 01:36:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:36:13,245 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2023-04-03 01:36:13,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-03 01:36:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2023-04-03 01:36:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 01:36:13,246 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:36:13,246 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] [2023-04-03 01:36:13,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 01:36:13,247 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:36:13,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:36:13,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1363052037, now seen corresponding path program 1 times [2023-04-03 01:36:13,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:36:13,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103777256] [2023-04-03 01:36:13,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:36:13,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:36:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:36:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:36:14,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:36:14,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103777256] [2023-04-03 01:36:14,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103777256] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:36:14,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:36:14,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 01:36:14,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770714] [2023-04-03 01:36:14,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:36:14,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 01:36:14,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:36:14,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 01:36:14,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:36:14,248 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-03 01:36:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:36:14,573 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2023-04-03 01:36:14,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 01:36:14,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-03 01:36:14,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:36:14,575 INFO L225 Difference]: With dead ends: 136 [2023-04-03 01:36:14,575 INFO L226 Difference]: Without dead ends: 134 [2023-04-03 01:36:14,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-03 01:36:14,576 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 36 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:36:14,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 607 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:36:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-04-03 01:36:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2023-04-03 01:36:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 74 states have internal predecessors, (85), 19 states have call successors, (19), 19 states have call predecessors, (19), 20 states have return successors, (21), 17 states have call predecessors, (21), 18 states have call successors, (21) [2023-04-03 01:36:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2023-04-03 01:36:14,613 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 43 [2023-04-03 01:36:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:36:14,613 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2023-04-03 01:36:14,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-03 01:36:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2023-04-03 01:36:14,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-03 01:36:14,614 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:36:14,614 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 01:36:14,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 01:36:14,615 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:36:14,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:36:14,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1249132814, now seen corresponding path program 1 times [2023-04-03 01:36:14,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:36:14,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417893218] [2023-04-03 01:36:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:36:14,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:36:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:36:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:36:18,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:36:18,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417893218] [2023-04-03 01:36:18,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417893218] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:36:18,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715888362] [2023-04-03 01:36:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:36:18,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:36:18,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:36:18,393 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:36:18,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:36:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:36:18,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 941 conjuncts, 88 conjunts are in the unsatisfiable core [2023-04-03 01:36:18,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:36:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:36:29,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:38:51,818 WARN L223 SmtUtils]: Spent 2.36m on a formula simplification. DAG size of input: 2704 DAG size of output: 168 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)