/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.4.1.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:27:01,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:27:01,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:27:01,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:27:01,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:27:01,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:27:01,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:27:01,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:27:01,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:27:01,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:27:01,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:27:01,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:27:01,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:27:01,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:27:01,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:27:01,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:27:01,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:27:01,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:27:01,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:27:01,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:27:01,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:27:01,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:27:01,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:27:01,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:27:01,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:27:01,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:27:01,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:27:01,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:27:01,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:27:01,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:27:01,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:27:01,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:27:01,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:27:01,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:27:01,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:27:01,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:27:01,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:27:01,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:27:01,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:27:01,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:27:01,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:27:01,337 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 12:27:01,359 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:27:01,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:27:01,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:27:01,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:27:01,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:27:01,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:27:01,361 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:27:01,361 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:27:01,361 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:27:01,361 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:27:01,362 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:27:01,362 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:27:01,362 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:27:01,362 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:27:01,362 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:27:01,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:27:01,362 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:27:01,363 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:27:01,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:27:01,363 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:27:01,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:27:01,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:27:01,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:27:01,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:27:01,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:27:01,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:27:01,364 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:27:01,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:27:01,365 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:27:01,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:27:01,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:27:01,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:27:01,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:27:01,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:27:01,365 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:27:01,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:27:01,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:27:01,366 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:27:01,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:27:01,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:27:01,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:27:01,366 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:27:01,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:27:01,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:27:01,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:27:01,550 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:27:01,551 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:27:01,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c [2023-04-01 12:27:02,597 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:27:02,808 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:27:02,808 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c [2023-04-01 12:27:02,817 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ccb03beb/ef86f3e538fa45ebb46e422b05fc84b4/FLAG92bb93ce1 [2023-04-01 12:27:02,830 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ccb03beb/ef86f3e538fa45ebb46e422b05fc84b4 [2023-04-01 12:27:02,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:27:02,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:27:02,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:27:02,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:27:02,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:27:02,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:27:02" (1/1) ... [2023-04-01 12:27:02,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7273b396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:02, skipping insertion in model container [2023-04-01 12:27:02,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:27:02" (1/1) ... [2023-04-01 12:27:02,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:27:02,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:27:03,092 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c[26618,26631] [2023-04-01 12:27:03,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:27:03,109 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:27:03,165 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c[26618,26631] [2023-04-01 12:27:03,165 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:27:03,176 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:27:03,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:03 WrapperNode [2023-04-01 12:27:03,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:27:03,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:27:03,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:27:03,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:27:03,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:03" (1/1) ... [2023-04-01 12:27:03,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:03" (1/1) ... [2023-04-01 12:27:03,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:03" (1/1) ... [2023-04-01 12:27:03,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:03" (1/1) ... [2023-04-01 12:27:03,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:03" (1/1) ... [2023-04-01 12:27:03,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:03" (1/1) ... [2023-04-01 12:27:03,227 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:03" (1/1) ... [2023-04-01 12:27:03,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:03" (1/1) ... [2023-04-01 12:27:03,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:27:03,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:27:03,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:27:03,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:27:03,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:03" (1/1) ... [2023-04-01 12:27:03,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:27:03,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:27:03,259 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 12:27:03,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:27:03,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:27:03,285 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:27:03,285 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:27:03,319 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 12:27:03,319 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 12:27:03,319 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 12:27:03,319 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 12:27:03,319 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 12:27:03,319 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 12:27:03,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:27:03,319 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 12:27:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:27:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:27:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:27:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:27:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:27:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:27:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:27:03,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:27:03,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:27:03,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:27:03,321 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 12:27:03,469 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:27:03,471 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:27:04,153 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:27:04,720 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:27:04,720 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 12:27:04,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:27:04 BoogieIcfgContainer [2023-04-01 12:27:04,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:27:04,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:27:04,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:27:04,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:27:04,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:27:02" (1/3) ... [2023-04-01 12:27:04,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2527ffaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:27:04, skipping insertion in model container [2023-04-01 12:27:04,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:03" (2/3) ... [2023-04-01 12:27:04,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2527ffaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:27:04, skipping insertion in model container [2023-04-01 12:27:04,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:27:04" (3/3) ... [2023-04-01 12:27:04,735 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c [2023-04-01 12:27:04,747 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:27:04,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:27:04,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:27:04,798 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;@64a56d26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:27:04,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:27:04,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 12:27:04,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 12:27:04,816 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:27:04,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:27:04,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:27:04,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:27:04,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1126304931, now seen corresponding path program 1 times [2023-04-01 12:27:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:27:04,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557355236] [2023-04-01 12:27:04,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:27:04,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:27:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:27:08,974 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 12:27:08,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:27:08,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557355236] [2023-04-01 12:27:08,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557355236] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:27:08,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:27:08,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 12:27:08,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066500557] [2023-04-01 12:27:08,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:27:08,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 12:27:08,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:27:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 12:27:08,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:27:09,001 INFO L87 Difference]: Start difference. First operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:27:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:27:10,656 INFO L93 Difference]: Finished difference Result 254 states and 357 transitions. [2023-04-01 12:27:10,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 12:27:10,658 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 85 [2023-04-01 12:27:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:27:10,665 INFO L225 Difference]: With dead ends: 254 [2023-04-01 12:27:10,666 INFO L226 Difference]: Without dead ends: 203 [2023-04-01 12:27:10,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 12:27:10,670 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1743 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1746 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:27:10,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1746 Valid, 165 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 12:27:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-04-01 12:27:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 191. [2023-04-01 12:27:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 161 states have (on average 1.5217391304347827) internal successors, (245), 162 states have internal predecessors, (245), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-01 12:27:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2023-04-01 12:27:10,712 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 85 [2023-04-01 12:27:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:27:10,713 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2023-04-01 12:27:10,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:27:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2023-04-01 12:27:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 12:27:10,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:27:10,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:27:10,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:27:10,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:27:10,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:27:10,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1175963898, now seen corresponding path program 1 times [2023-04-01 12:27:10,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:27:10,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667484659] [2023-04-01 12:27:10,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:27:10,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:27:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:27:12,267 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 12:27:12,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:27:12,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667484659] [2023-04-01 12:27:12,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667484659] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:27:12,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:27:12,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:27:12,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996106902] [2023-04-01 12:27:12,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:27:12,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:27:12,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:27:12,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:27:12,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:27:12,276 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:27:13,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:27:13,209 INFO L93 Difference]: Finished difference Result 271 states and 378 transitions. [2023-04-01 12:27:13,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:27:13,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2023-04-01 12:27:13,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:27:13,212 INFO L225 Difference]: With dead ends: 271 [2023-04-01 12:27:13,212 INFO L226 Difference]: Without dead ends: 230 [2023-04-01 12:27:13,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:27:13,213 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 569 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 12:27:13,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 98 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 12:27:13,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-04-01 12:27:13,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 202. [2023-04-01 12:27:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5406976744186047) internal successors, (265), 173 states have internal predecessors, (265), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:27:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 294 transitions. [2023-04-01 12:27:13,232 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 294 transitions. Word has length 86 [2023-04-01 12:27:13,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:27:13,232 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 294 transitions. [2023-04-01 12:27:13,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:27:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 294 transitions. [2023-04-01 12:27:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 12:27:13,233 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:27:13,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:27:13,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:27:13,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:27:13,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:27:13,234 INFO L85 PathProgramCache]: Analyzing trace with hash -472864020, now seen corresponding path program 1 times [2023-04-01 12:27:13,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:27:13,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146654616] [2023-04-01 12:27:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:27:13,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:27:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:27:14,535 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 12:27:14,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:27:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146654616] [2023-04-01 12:27:14,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146654616] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:27:14,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:27:14,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:27:14,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943005419] [2023-04-01 12:27:14,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:27:14,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:27:14,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:27:14,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:27:14,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:27:14,539 INFO L87 Difference]: Start difference. First operand 202 states and 294 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:27:15,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:27:15,542 INFO L93 Difference]: Finished difference Result 275 states and 380 transitions. [2023-04-01 12:27:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:27:15,543 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-04-01 12:27:15,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:27:15,544 INFO L225 Difference]: With dead ends: 275 [2023-04-01 12:27:15,544 INFO L226 Difference]: Without dead ends: 234 [2023-04-01 12:27:15,545 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 12:27:15,545 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 572 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 12:27:15,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 109 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 12:27:15,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-04-01 12:27:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 202. [2023-04-01 12:27:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5348837209302326) internal successors, (264), 173 states have internal predecessors, (264), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:27:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 293 transitions. [2023-04-01 12:27:15,567 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 293 transitions. Word has length 87 [2023-04-01 12:27:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:27:15,567 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 293 transitions. [2023-04-01 12:27:15,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:27:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 293 transitions. [2023-04-01 12:27:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 12:27:15,568 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:27:15,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:27:15,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:27:15,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:27:15,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:27:15,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1059789475, now seen corresponding path program 1 times [2023-04-01 12:27:15,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:27:15,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293232310] [2023-04-01 12:27:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:27:15,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:27:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:27:16,996 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 12:27:16,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:27:16,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293232310] [2023-04-01 12:27:16,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293232310] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:27:16,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:27:16,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:27:16,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052622727] [2023-04-01 12:27:16,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:27:16,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:27:16,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:27:16,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:27:16,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:27:16,998 INFO L87 Difference]: Start difference. First operand 202 states and 293 transitions. Second operand has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:27:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:27:18,037 INFO L93 Difference]: Finished difference Result 281 states and 385 transitions. [2023-04-01 12:27:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:27:18,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2023-04-01 12:27:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:27:18,039 INFO L225 Difference]: With dead ends: 281 [2023-04-01 12:27:18,039 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 12:27:18,040 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 12:27:18,040 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 317 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 12:27:18,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 119 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 12:27:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 12:27:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2023-04-01 12:27:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5290697674418605) internal successors, (263), 173 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:27:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 292 transitions. [2023-04-01 12:27:18,057 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 292 transitions. Word has length 88 [2023-04-01 12:27:18,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:27:18,057 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 292 transitions. [2023-04-01 12:27:18,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:27:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 292 transitions. [2023-04-01 12:27:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 12:27:18,058 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:27:18,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:27:18,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:27:18,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:27:18,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:27:18,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1860848331, now seen corresponding path program 1 times [2023-04-01 12:27:18,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:27:18,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783382091] [2023-04-01 12:27:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:27:18,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:27:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:27:19,570 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 12:27:19,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:27:19,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783382091] [2023-04-01 12:27:19,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783382091] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:27:19,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:27:19,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:27:19,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724886426] [2023-04-01 12:27:19,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:27:19,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:27:19,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:27:19,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:27:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:27:19,577 INFO L87 Difference]: Start difference. First operand 202 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:27:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:27:20,595 INFO L93 Difference]: Finished difference Result 287 states and 390 transitions. [2023-04-01 12:27:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:27:20,596 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 89 [2023-04-01 12:27:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:27:20,597 INFO L225 Difference]: With dead ends: 287 [2023-04-01 12:27:20,597 INFO L226 Difference]: Without dead ends: 246 [2023-04-01 12:27:20,598 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 12:27:20,599 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 581 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 12:27:20,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 104 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 12:27:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-04-01 12:27:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 202. [2023-04-01 12:27:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5232558139534884) internal successors, (262), 173 states have internal predecessors, (262), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:27:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 291 transitions. [2023-04-01 12:27:20,616 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 291 transitions. Word has length 89 [2023-04-01 12:27:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:27:20,617 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 291 transitions. [2023-04-01 12:27:20,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:27:20,617 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 291 transitions. [2023-04-01 12:27:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 12:27:20,617 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:27:20,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:27:20,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:27:20,618 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:27:20,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:27:20,618 INFO L85 PathProgramCache]: Analyzing trace with hash -550334435, now seen corresponding path program 1 times [2023-04-01 12:27:20,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:27:20,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38032140] [2023-04-01 12:27:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:27:20,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:27:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:27:23,286 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 12:27:23,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:27:23,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38032140] [2023-04-01 12:27:23,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38032140] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:27:23,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:27:23,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 12:27:23,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377656014] [2023-04-01 12:27:23,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:27:23,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 12:27:23,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:27:23,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 12:27:23,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:27:23,288 INFO L87 Difference]: Start difference. First operand 202 states and 291 transitions. Second operand has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:27:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:27:24,839 INFO L93 Difference]: Finished difference Result 282 states and 393 transitions. [2023-04-01 12:27:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 12:27:24,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 91 [2023-04-01 12:27:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:27:24,841 INFO L225 Difference]: With dead ends: 282 [2023-04-01 12:27:24,841 INFO L226 Difference]: Without dead ends: 238 [2023-04-01 12:27:24,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 12:27:24,843 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1612 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 2168 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:27:24,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1615 Valid, 148 Invalid, 2304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2168 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 12:27:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-04-01 12:27:24,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 204. [2023-04-01 12:27:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.5114942528735633) internal successors, (263), 175 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:27:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 292 transitions. [2023-04-01 12:27:24,863 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 292 transitions. Word has length 91 [2023-04-01 12:27:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:27:24,863 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 292 transitions. [2023-04-01 12:27:24,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:27:24,863 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 292 transitions. [2023-04-01 12:27:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 12:27:24,864 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:27:24,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:27:24,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:27:24,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:27:24,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:27:24,865 INFO L85 PathProgramCache]: Analyzing trace with hash -330762086, now seen corresponding path program 1 times [2023-04-01 12:27:24,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:27:24,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438314619] [2023-04-01 12:27:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:27:24,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:27:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:27:25,647 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 12:27:25,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:27:25,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438314619] [2023-04-01 12:27:25,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438314619] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:27:25,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:27:25,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:27:25,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619365908] [2023-04-01 12:27:25,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:27:25,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:27:25,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:27:25,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:27:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:27:25,649 INFO L87 Difference]: Start difference. First operand 204 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:27:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:27:26,472 INFO L93 Difference]: Finished difference Result 279 states and 386 transitions. [2023-04-01 12:27:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:27:26,473 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2023-04-01 12:27:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:27:26,474 INFO L225 Difference]: With dead ends: 279 [2023-04-01 12:27:26,474 INFO L226 Difference]: Without dead ends: 231 [2023-04-01 12:27:26,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:27:26,478 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 551 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:27:26,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 99 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:27:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-01 12:27:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 204. [2023-04-01 12:27:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4885057471264367) internal successors, (259), 175 states have internal predecessors, (259), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:27:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 288 transitions. [2023-04-01 12:27:26,504 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 288 transitions. Word has length 92 [2023-04-01 12:27:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:27:26,504 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 288 transitions. [2023-04-01 12:27:26,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:27:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 288 transitions. [2023-04-01 12:27:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 12:27:26,505 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:27:26,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:27:26,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:27:26,506 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:27:26,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:27:26,506 INFO L85 PathProgramCache]: Analyzing trace with hash -144941696, now seen corresponding path program 1 times [2023-04-01 12:27:26,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:27:26,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187281132] [2023-04-01 12:27:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:27:26,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:27:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:27:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:27:28,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:27:28,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187281132] [2023-04-01 12:27:28,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187281132] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:27:28,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:27:28,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-01 12:27:28,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666954088] [2023-04-01 12:27:28,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:27:28,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 12:27:28,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:27:28,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 12:27:28,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:27:28,973 INFO L87 Difference]: Start difference. First operand 204 states and 288 transitions. Second operand has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:27:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:27:30,930 INFO L93 Difference]: Finished difference Result 295 states and 393 transitions. [2023-04-01 12:27:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 12:27:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 94 [2023-04-01 12:27:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:27:30,933 INFO L225 Difference]: With dead ends: 295 [2023-04-01 12:27:30,933 INFO L226 Difference]: Without dead ends: 251 [2023-04-01 12:27:30,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 12:27:30,938 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1563 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1566 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:27:30,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1566 Valid, 176 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 12:27:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-04-01 12:27:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 204. [2023-04-01 12:27:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 175 states have internal predecessors, (258), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:27:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 287 transitions. [2023-04-01 12:27:30,964 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 287 transitions. Word has length 94 [2023-04-01 12:27:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:27:30,964 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 287 transitions. [2023-04-01 12:27:30,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:27:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 287 transitions. [2023-04-01 12:27:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 12:27:30,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:27:30,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:27:30,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:27:30,967 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:27:30,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:27:30,968 INFO L85 PathProgramCache]: Analyzing trace with hash 111744814, now seen corresponding path program 1 times [2023-04-01 12:27:30,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:27:30,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569490470] [2023-04-01 12:27:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:27:30,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:27:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:27:32,235 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 12:27:32,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:27:32,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569490470] [2023-04-01 12:27:32,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569490470] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:27:32,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:27:32,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 12:27:32,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877295179] [2023-04-01 12:27:32,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:27:32,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 12:27:32,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:27:32,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 12:27:32,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:27:32,238 INFO L87 Difference]: Start difference. First operand 204 states and 287 transitions. Second operand has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 12:27:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:27:32,625 INFO L93 Difference]: Finished difference Result 282 states and 388 transitions. [2023-04-01 12:27:32,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 12:27:32,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-04-01 12:27:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:27:32,627 INFO L225 Difference]: With dead ends: 282 [2023-04-01 12:27:32,627 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 12:27:32,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:27:32,630 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 40 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:27:32,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2696 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:27:32,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 12:27:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 212. [2023-04-01 12:27:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.458100558659218) internal successors, (261), 181 states have internal predecessors, (261), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 12:27:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 293 transitions. [2023-04-01 12:27:32,667 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 293 transitions. Word has length 95 [2023-04-01 12:27:32,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:27:32,667 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 293 transitions. [2023-04-01 12:27:32,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 12:27:32,667 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 293 transitions. [2023-04-01 12:27:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 12:27:32,669 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:27:32,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:27:32,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:27:32,669 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:27:32,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:27:32,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1858138218, now seen corresponding path program 1 times [2023-04-01 12:27:32,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:27:32,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416791569] [2023-04-01 12:27:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:27:32,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:27:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:27:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:27:40,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:27:40,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416791569] [2023-04-01 12:27:40,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416791569] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:27:40,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420322384] [2023-04-01 12:27:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:27:40,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:27:40,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:27:40,201 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:27:40,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:27:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:27:40,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 98 conjunts are in the unsatisfiable core [2023-04-01 12:27:40,581 INFO L285 TraceCheckSpWp]: Computing forward predicates...