/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:27:43,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:27:43,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:27:43,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:27:43,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:27:43,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:27:43,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:27:43,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:27:43,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:27:43,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:27:43,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:27:43,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:27:43,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:27:43,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:27:43,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:27:43,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:27:43,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:27:43,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:27:43,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:27:43,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:27:43,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:27:43,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:27:43,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:27:43,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:27:43,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:27:43,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:27:43,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:27:43,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:27:43,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:27:43,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:27:43,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:27:43,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:27:43,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:27:43,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:27:43,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:27:43,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:27:43,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:27:43,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:27:43,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:27:43,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:27:43,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:27:43,154 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:27:43,176 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:27:43,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:27:43,177 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:27:43,177 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:27:43,178 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:27:43,178 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:27:43,178 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:27:43,178 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:27:43,178 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:27:43,178 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:27:43,179 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:27:43,179 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:27:43,179 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:27:43,179 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:27:43,179 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:27:43,179 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:27:43,179 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:27:43,179 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:27:43,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:27:43,180 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:27:43,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:27:43,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:27:43,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:27:43,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:27:43,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:27:43,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:27:43,181 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:27:43,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:27:43,181 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:27:43,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:27:43,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:27:43,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:27:43,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:27:43,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:27:43,182 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:27:43,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:27:43,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:27:43,182 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:27:43,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:27:43,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:27:43,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:27:43,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:27:43,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:27:43,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:27:43,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:27:43,389 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:27:43,390 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:27:43,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c [2023-04-01 12:27:44,315 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:27:44,621 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:27:44,621 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c [2023-04-01 12:27:44,643 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8489db47a/1575e5ce865842db807e8cd31566f28a/FLAGb49acd785 [2023-04-01 12:27:44,929 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8489db47a/1575e5ce865842db807e8cd31566f28a [2023-04-01 12:27:44,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:27:44,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:27:44,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:27:44,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:27:44,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:27:44,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:27:44" (1/1) ... [2023-04-01 12:27:44,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56bb7be8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:44, skipping insertion in model container [2023-04-01 12:27:44,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:27:44" (1/1) ... [2023-04-01 12:27:44,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:27:44,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:27:45,229 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c[55979,55992] [2023-04-01 12:27:45,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:27:45,246 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:27:45,328 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c[55979,55992] [2023-04-01 12:27:45,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:27:45,341 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:27:45,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:45 WrapperNode [2023-04-01 12:27:45,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:27:45,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:27:45,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:27:45,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:27:45,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:45" (1/1) ... [2023-04-01 12:27:45,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:45" (1/1) ... [2023-04-01 12:27:45,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:45" (1/1) ... [2023-04-01 12:27:45,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:45" (1/1) ... [2023-04-01 12:27:45,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:45" (1/1) ... [2023-04-01 12:27:45,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:45" (1/1) ... [2023-04-01 12:27:45,443 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:45" (1/1) ... [2023-04-01 12:27:45,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:45" (1/1) ... [2023-04-01 12:27:45,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:27:45,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:27:45,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:27:45,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:27:45,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:45" (1/1) ... [2023-04-01 12:27:45,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:27:45,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:27:45,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:27:45,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:27:45,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:27:45,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:27:45,545 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:27:45,546 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:27:45,546 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 12:27:45,546 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 12:27:45,546 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 12:27:45,546 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 12:27:45,546 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-01 12:27:45,546 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 12:27:45,546 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 12:27:45,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:27:45,546 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 12:27:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:27:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 12:27:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:27:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:27:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:27:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:27:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:27:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:27:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:27:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:27:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:27:45,747 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:27:45,748 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:27:46,827 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:27:47,636 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:27:47,636 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 12:27:47,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:27:47 BoogieIcfgContainer [2023-04-01 12:27:47,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:27:47,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:27:47,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:27:47,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:27:47,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:27:44" (1/3) ... [2023-04-01 12:27:47,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd6b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:27:47, skipping insertion in model container [2023-04-01 12:27:47,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:45" (2/3) ... [2023-04-01 12:27:47,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd6b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:27:47, skipping insertion in model container [2023-04-01 12:27:47,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:27:47" (3/3) ... [2023-04-01 12:27:47,649 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.1.ufo.UNBOUNDED.pals.c [2023-04-01 12:27:47,663 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:27:47,664 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:27:47,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:27:47,727 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;@26ee5090, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:27:47,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:27:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 478 states, 454 states have (on average 1.6938325991189427) internal successors, (769), 456 states have internal predecessors, (769), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:27:47,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-01 12:27:47,760 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:27:47,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:27:47,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:27:47,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:27:47,766 INFO L85 PathProgramCache]: Analyzing trace with hash 185846783, now seen corresponding path program 1 times [2023-04-01 12:27:47,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:27:47,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570097849] [2023-04-01 12:27:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:27:47,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:27:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:27:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:27:56,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:27:56,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570097849] [2023-04-01 12:27:56,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570097849] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:27:56,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:27:56,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-01 12:27:56,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917348589] [2023-04-01 12:27:56,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:27:56,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 12:27:56,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:27:56,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 12:27:56,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:27:56,337 INFO L87 Difference]: Start difference. First operand has 478 states, 454 states have (on average 1.6938325991189427) internal successors, (769), 456 states have internal predecessors, (769), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 12:28:00,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:28:00,593 INFO L93 Difference]: Finished difference Result 578 states and 929 transitions. [2023-04-01 12:28:00,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 12:28:00,595 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 160 [2023-04-01 12:28:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:28:00,605 INFO L225 Difference]: With dead ends: 578 [2023-04-01 12:28:00,605 INFO L226 Difference]: Without dead ends: 533 [2023-04-01 12:28:00,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 12:28:00,610 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6458 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7173 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6461 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 7363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 7173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:28:00,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6461 Valid, 142 Invalid, 7363 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [190 Valid, 7173 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 12:28:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-04-01 12:28:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 509. [2023-04-01 12:28:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6821052631578948) internal successors, (799), 476 states have internal predecessors, (799), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-01 12:28:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 833 transitions. [2023-04-01 12:28:00,694 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 833 transitions. Word has length 160 [2023-04-01 12:28:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:28:00,696 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 833 transitions. [2023-04-01 12:28:00,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 12:28:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 833 transitions. [2023-04-01 12:28:00,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 12:28:00,703 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:28:00,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:28:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:28:00,704 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:28:00,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:28:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1834575053, now seen corresponding path program 1 times [2023-04-01 12:28:00,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:28:00,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446354708] [2023-04-01 12:28:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:28:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:28:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:28:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:28:03,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:28:03,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446354708] [2023-04-01 12:28:03,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446354708] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:28:03,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:28:03,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:28:03,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334947641] [2023-04-01 12:28:03,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:28:03,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:28:03,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:28:03,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:28:03,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:28:03,744 INFO L87 Difference]: Start difference. First operand 509 states and 833 transitions. Second operand has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 12:28:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:28:06,066 INFO L93 Difference]: Finished difference Result 589 states and 935 transitions. [2023-04-01 12:28:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:28:06,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 161 [2023-04-01 12:28:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:28:06,070 INFO L225 Difference]: With dead ends: 589 [2023-04-01 12:28:06,070 INFO L226 Difference]: Without dead ends: 540 [2023-04-01 12:28:06,071 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 12:28:06,072 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 847 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 5520 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 5558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 5520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:28:06,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 96 Invalid, 5558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 5520 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 12:28:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-04-01 12:28:06,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 509. [2023-04-01 12:28:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.68) internal successors, (798), 476 states have internal predecessors, (798), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 12:28:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 831 transitions. [2023-04-01 12:28:06,108 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 831 transitions. Word has length 161 [2023-04-01 12:28:06,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:28:06,108 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 831 transitions. [2023-04-01 12:28:06,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 12:28:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 831 transitions. [2023-04-01 12:28:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 12:28:06,110 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:28:06,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:28:06,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:28:06,110 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:28:06,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:28:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1063568872, now seen corresponding path program 1 times [2023-04-01 12:28:06,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:28:06,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037114524] [2023-04-01 12:28:06,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:28:06,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:28:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:28:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:28:08,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:28:08,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037114524] [2023-04-01 12:28:08,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037114524] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:28:08,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:28:08,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:28:08,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483401611] [2023-04-01 12:28:08,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:28:08,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:28:08,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:28:08,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:28:08,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:28:08,832 INFO L87 Difference]: Start difference. First operand 509 states and 831 transitions. Second operand has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 12:28:11,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:28:11,279 INFO L93 Difference]: Finished difference Result 583 states and 919 transitions. [2023-04-01 12:28:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:28:11,280 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 162 [2023-04-01 12:28:11,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:28:11,282 INFO L225 Difference]: With dead ends: 583 [2023-04-01 12:28:11,283 INFO L226 Difference]: Without dead ends: 539 [2023-04-01 12:28:11,283 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 12:28:11,284 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1642 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6313 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 6355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:28:11,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 99 Invalid, 6355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 6313 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 12:28:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-04-01 12:28:11,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 509. [2023-04-01 12:28:11,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6778947368421053) internal successors, (797), 476 states have internal predecessors, (797), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 12:28:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 830 transitions. [2023-04-01 12:28:11,329 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 830 transitions. Word has length 162 [2023-04-01 12:28:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:28:11,331 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 830 transitions. [2023-04-01 12:28:11,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 12:28:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 830 transitions. [2023-04-01 12:28:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 12:28:11,332 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:28:11,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:28:11,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:28:11,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:28:11,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:28:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1818428732, now seen corresponding path program 1 times [2023-04-01 12:28:11,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:28:11,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581202375] [2023-04-01 12:28:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:28:11,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:28:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:28:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:28:13,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:28:13,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581202375] [2023-04-01 12:28:13,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581202375] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:28:13,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:28:13,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:28:13,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412440685] [2023-04-01 12:28:13,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:28:13,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:28:13,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:28:13,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:28:13,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:28:13,942 INFO L87 Difference]: Start difference. First operand 509 states and 830 transitions. Second operand has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 12:28:16,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:28:16,159 INFO L93 Difference]: Finished difference Result 589 states and 924 transitions. [2023-04-01 12:28:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:28:16,160 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 163 [2023-04-01 12:28:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:28:16,162 INFO L225 Difference]: With dead ends: 589 [2023-04-01 12:28:16,162 INFO L226 Difference]: Without dead ends: 545 [2023-04-01 12:28:16,163 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 12:28:16,164 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 857 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 5556 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 5556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:28:16,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 100 Invalid, 5592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 5556 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 12:28:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-04-01 12:28:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 509. [2023-04-01 12:28:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6757894736842105) internal successors, (796), 476 states have internal predecessors, (796), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 12:28:16,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 829 transitions. [2023-04-01 12:28:16,196 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 829 transitions. Word has length 163 [2023-04-01 12:28:16,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:28:16,196 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 829 transitions. [2023-04-01 12:28:16,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 12:28:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 829 transitions. [2023-04-01 12:28:16,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-01 12:28:16,198 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:28:16,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:28:16,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:28:16,198 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:28:16,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:28:16,198 INFO L85 PathProgramCache]: Analyzing trace with hash 555992017, now seen corresponding path program 1 times [2023-04-01 12:28:16,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:28:16,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221487100] [2023-04-01 12:28:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:28:16,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:28:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:28:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:28:18,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:28:18,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221487100] [2023-04-01 12:28:18,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221487100] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:28:18,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:28:18,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:28:18,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604226950] [2023-04-01 12:28:18,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:28:18,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:28:18,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:28:18,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:28:18,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:28:18,715 INFO L87 Difference]: Start difference. First operand 509 states and 829 transitions. Second operand has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 12:28:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:28:20,876 INFO L93 Difference]: Finished difference Result 595 states and 929 transitions. [2023-04-01 12:28:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:28:20,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 164 [2023-04-01 12:28:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:28:20,879 INFO L225 Difference]: With dead ends: 595 [2023-04-01 12:28:20,879 INFO L226 Difference]: Without dead ends: 551 [2023-04-01 12:28:20,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 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 12:28:20,886 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 865 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 5574 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 5620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:28:20,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 102 Invalid, 5620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5574 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 12:28:20,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-04-01 12:28:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 509. [2023-04-01 12:28:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6736842105263159) internal successors, (795), 476 states have internal predecessors, (795), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 12:28:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 828 transitions. [2023-04-01 12:28:20,925 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 828 transitions. Word has length 164 [2023-04-01 12:28:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:28:20,926 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 828 transitions. [2023-04-01 12:28:20,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 12:28:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 828 transitions. [2023-04-01 12:28:20,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-01 12:28:20,928 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:28:20,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:28:20,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:28:20,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:28:20,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:28:20,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1181870917, now seen corresponding path program 1 times [2023-04-01 12:28:20,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:28:20,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934778884] [2023-04-01 12:28:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:28:20,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:28:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:28:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:28:23,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:28:23,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934778884] [2023-04-01 12:28:23,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934778884] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:28:23,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:28:23,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:28:23,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878689481] [2023-04-01 12:28:23,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:28:23,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:28:23,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:28:23,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:28:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:28:23,421 INFO L87 Difference]: Start difference. First operand 509 states and 828 transitions. Second operand has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 12:28:25,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:28:25,958 INFO L93 Difference]: Finished difference Result 601 states and 934 transitions. [2023-04-01 12:28:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:28:25,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 165 [2023-04-01 12:28:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:28:25,961 INFO L225 Difference]: With dead ends: 601 [2023-04-01 12:28:25,961 INFO L226 Difference]: Without dead ends: 557 [2023-04-01 12:28:25,962 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 12:28:25,965 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 859 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6393 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 6419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 6393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:28:25,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 111 Invalid, 6419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 6393 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 12:28:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-04-01 12:28:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 509. [2023-04-01 12:28:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.671578947368421) internal successors, (794), 476 states have internal predecessors, (794), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 12:28:26,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 827 transitions. [2023-04-01 12:28:26,002 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 827 transitions. Word has length 165 [2023-04-01 12:28:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:28:26,003 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 827 transitions. [2023-04-01 12:28:26,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 12:28:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 827 transitions. [2023-04-01 12:28:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-01 12:28:26,004 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:28:26,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:28:26,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:28:26,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:28:26,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:28:26,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1236225555, now seen corresponding path program 1 times [2023-04-01 12:28:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:28:26,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873144788] [2023-04-01 12:28:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:28:26,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:28:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:28:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:28:31,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:28:31,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873144788] [2023-04-01 12:28:31,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873144788] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:28:31,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:28:31,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-01 12:28:31,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527220784] [2023-04-01 12:28:31,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:28:31,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 12:28:31,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:28:31,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 12:28:31,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-04-01 12:28:31,451 INFO L87 Difference]: Start difference. First operand 509 states and 827 transitions. Second operand has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9)