/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 IntervalDomain -i ../sv-benchmarks/c/systemc/toy1.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:07:46,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:07:46,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:07:46,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 00:07:46,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 00:07:46,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 00:07:46,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 00:07:46,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 00:07:46,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 00:07:46,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 00:07:46,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 00:07:46,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 00:07:46,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 00:07:46,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 00:07:46,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 00:07:46,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 00:07:46,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 00:07:46,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 00:07:46,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 00:07:46,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 00:07:46,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 00:07:46,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 00:07:46,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 00:07:46,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 00:07:46,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 00:07:46,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 00:07:46,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 00:07:46,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 00:07:46,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 00:07:46,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 00:07:46,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 00:07:46,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 00:07:46,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 00:07:46,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:07:46,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:07:46,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:07:46,228 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 00:07:46,259 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:07:46,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:07:46,260 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:07:46,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:07:46,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:07:46,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:07:46,262 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:07:46,262 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:07:46,262 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:07:46,262 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:07:46,263 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:07:46,263 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:07:46,263 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:07:46,263 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:07:46,263 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:07:46,264 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:07:46,264 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:07:46,264 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:07:46,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:07:46,265 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:07:46,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:07:46,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:07:46,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:07:46,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:07:46,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:07:46,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:07:46,266 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:07:46,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:07:46,266 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:07:46,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:07:46,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:07:46,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:07:46,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:07:46,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:07:46,267 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:07:46,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:07:46,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:07:46,267 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:07:46,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:07:46,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:07:46,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:07:46,268 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:07:46,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:07:46,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:07:46,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:07:46,581 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:07:46,582 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:07:46,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/toy1.cil.c [2023-04-01 00:07:47,792 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:07:48,038 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:07:48,039 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/toy1.cil.c [2023-04-01 00:07:48,050 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d29823b8b/e8da9efcb1154d38a5768eabc9ee117e/FLAG08c213c69 [2023-04-01 00:07:48,068 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d29823b8b/e8da9efcb1154d38a5768eabc9ee117e [2023-04-01 00:07:48,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:07:48,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:07:48,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:07:48,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:07:48,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:07:48,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:07:48" (1/1) ... [2023-04-01 00:07:48,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@625ef4e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:07:48, skipping insertion in model container [2023-04-01 00:07:48,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:07:48" (1/1) ... [2023-04-01 00:07:48,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:07:48,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:07:48,255 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/systemc/toy1.cil.c[698,711] [2023-04-01 00:07:48,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:07:48,330 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:07:48,341 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/systemc/toy1.cil.c[698,711] [2023-04-01 00:07:48,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:07:48,396 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:07:48,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:07:48 WrapperNode [2023-04-01 00:07:48,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:07:48,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:07:48,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:07:48,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:07:48,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:07:48" (1/1) ... [2023-04-01 00:07:48,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:07:48" (1/1) ... [2023-04-01 00:07:48,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:07:48" (1/1) ... [2023-04-01 00:07:48,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:07:48" (1/1) ... [2023-04-01 00:07:48,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:07:48" (1/1) ... [2023-04-01 00:07:48,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:07:48" (1/1) ... [2023-04-01 00:07:48,459 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:07:48" (1/1) ... [2023-04-01 00:07:48,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:07:48" (1/1) ... [2023-04-01 00:07:48,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:07:48,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:07:48,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:07:48,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:07:48,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:07:48" (1/1) ... [2023-04-01 00:07:48,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:07:48,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:07:48,504 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 00:07:48,510 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 00:07:48,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:07:48,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:07:48,539 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:07:48,539 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-01 00:07:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure write_loop [2023-04-01 00:07:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure compute1 [2023-04-01 00:07:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure compute2 [2023-04-01 00:07:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure write_back [2023-04-01 00:07:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure read [2023-04-01 00:07:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-01 00:07:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-01 00:07:48,540 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:07:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:07:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:07:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:07:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:07:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 00:07:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-01 00:07:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure write_loop [2023-04-01 00:07:48,541 INFO L130 BoogieDeclarations]: Found specification of procedure compute1 [2023-04-01 00:07:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure compute2 [2023-04-01 00:07:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure write_back [2023-04-01 00:07:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:07:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-01 00:07:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-01 00:07:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:07:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:07:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:07:48,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:07:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:07:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:07:48,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:07:48,650 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:07:48,669 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:07:49,128 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:07:49,387 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:07:49,387 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-01 00:07:49,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:07:49 BoogieIcfgContainer [2023-04-01 00:07:49,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:07:49,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:07:49,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:07:49,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:07:49,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:07:48" (1/3) ... [2023-04-01 00:07:49,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cdf99c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:07:49, skipping insertion in model container [2023-04-01 00:07:49,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:07:48" (2/3) ... [2023-04-01 00:07:49,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cdf99c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:07:49, skipping insertion in model container [2023-04-01 00:07:49,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:07:49" (3/3) ... [2023-04-01 00:07:49,402 INFO L112 eAbstractionObserver]: Analyzing ICFG toy1.cil.c [2023-04-01 00:07:49,419 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:07:49,420 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:07:49,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:07:49,548 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;@40b66abc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:07:49,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:07:49,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 58 states have (on average 1.603448275862069) internal successors, (93), 66 states have internal predecessors, (93), 11 states have call successors, (11), 10 states have call predecessors, (11), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:07:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 00:07:49,558 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:49,559 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] [2023-04-01 00:07:49,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:49,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:49,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1367231311, now seen corresponding path program 1 times [2023-04-01 00:07:49,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:49,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919305141] [2023-04-01 00:07:49,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:49,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:50,100 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 00:07:50,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:50,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919305141] [2023-04-01 00:07:50,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919305141] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:50,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:07:50,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:07:50,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407770671] [2023-04-01 00:07:50,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:50,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:50,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:50,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:50,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:07:50,157 INFO L87 Difference]: Start difference. First operand has 81 states, 58 states have (on average 1.603448275862069) internal successors, (93), 66 states have internal predecessors, (93), 11 states have call successors, (11), 10 states have call predecessors, (11), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:07:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:50,319 INFO L93 Difference]: Finished difference Result 207 states and 305 transitions. [2023-04-01 00:07:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:07:50,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 00:07:50,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:50,337 INFO L225 Difference]: With dead ends: 207 [2023-04-01 00:07:50,338 INFO L226 Difference]: Without dead ends: 122 [2023-04-01 00:07:50,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:07:50,347 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 78 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:50,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 163 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:50,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-04-01 00:07:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2023-04-01 00:07:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 91 states have (on average 1.5274725274725274) internal successors, (139), 101 states have internal predecessors, (139), 17 states have call successors, (17), 16 states have call predecessors, (17), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-01 00:07:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 170 transitions. [2023-04-01 00:07:50,388 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 170 transitions. Word has length 25 [2023-04-01 00:07:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:50,389 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 170 transitions. [2023-04-01 00:07:50,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:07:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 170 transitions. [2023-04-01 00:07:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 00:07:50,392 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:50,392 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 00:07:50,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:07:50,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:50,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash -218762252, now seen corresponding path program 1 times [2023-04-01 00:07:50,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:50,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389010800] [2023-04-01 00:07:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:50,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:07:50,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:50,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389010800] [2023-04-01 00:07:50,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389010800] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:50,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:07:50,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:07:50,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091619595] [2023-04-01 00:07:50,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:50,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:07:50,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:07:50,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:50,919 INFO L87 Difference]: Start difference. First operand 121 states and 170 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 00:07:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:51,384 INFO L93 Difference]: Finished difference Result 460 states and 704 transitions. [2023-04-01 00:07:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 00:07:51,390 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-04-01 00:07:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:51,394 INFO L225 Difference]: With dead ends: 460 [2023-04-01 00:07:51,394 INFO L226 Difference]: Without dead ends: 349 [2023-04-01 00:07:51,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-04-01 00:07:51,397 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 358 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:51,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 460 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:07:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-04-01 00:07:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 235. [2023-04-01 00:07:51,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 177 states have (on average 1.576271186440678) internal successors, (279), 205 states have internal predecessors, (279), 35 states have call successors, (35), 26 states have call predecessors, (35), 22 states have return successors, (38), 26 states have call predecessors, (38), 31 states have call successors, (38) [2023-04-01 00:07:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 352 transitions. [2023-04-01 00:07:51,435 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 352 transitions. Word has length 39 [2023-04-01 00:07:51,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:51,436 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 352 transitions. [2023-04-01 00:07:51,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 00:07:51,436 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 352 transitions. [2023-04-01 00:07:51,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 00:07:51,438 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:51,439 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 00:07:51,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:07:51,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:51,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:51,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2067945860, now seen corresponding path program 1 times [2023-04-01 00:07:51,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:51,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504571951] [2023-04-01 00:07:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:51,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:07:51,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:51,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504571951] [2023-04-01 00:07:51,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504571951] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:51,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:07:51,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:07:51,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138734586] [2023-04-01 00:07:51,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:51,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:07:51,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:51,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:07:51,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:07:51,692 INFO L87 Difference]: Start difference. First operand 235 states and 352 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 00:07:52,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:52,137 INFO L93 Difference]: Finished difference Result 973 states and 1569 transitions. [2023-04-01 00:07:52,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 00:07:52,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2023-04-01 00:07:52,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:52,150 INFO L225 Difference]: With dead ends: 973 [2023-04-01 00:07:52,150 INFO L226 Difference]: Without dead ends: 748 [2023-04-01 00:07:52,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-04-01 00:07:52,161 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 333 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:52,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 533 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:07:52,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2023-04-01 00:07:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 636. [2023-04-01 00:07:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 490 states have (on average 1.6) internal successors, (784), 575 states have internal predecessors, (784), 92 states have call successors, (92), 57 states have call predecessors, (92), 53 states have return successors, (116), 72 states have call predecessors, (116), 88 states have call successors, (116) [2023-04-01 00:07:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 992 transitions. [2023-04-01 00:07:52,274 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 992 transitions. Word has length 40 [2023-04-01 00:07:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:52,275 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 992 transitions. [2023-04-01 00:07:52,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 00:07:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 992 transitions. [2023-04-01 00:07:52,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 00:07:52,278 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:52,278 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:07:52,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:07:52,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:52,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash -270121389, now seen corresponding path program 1 times [2023-04-01 00:07:52,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:52,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744804788] [2023-04-01 00:07:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:52,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:07:52,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744804788] [2023-04-01 00:07:52,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744804788] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:52,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:07:52,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 00:07:52,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032400241] [2023-04-01 00:07:52,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:52,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 00:07:52,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:52,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 00:07:52,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 00:07:52,519 INFO L87 Difference]: Start difference. First operand 636 states and 992 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 00:07:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:52,816 INFO L93 Difference]: Finished difference Result 2141 states and 3366 transitions. [2023-04-01 00:07:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 00:07:52,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2023-04-01 00:07:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:52,825 INFO L225 Difference]: With dead ends: 2141 [2023-04-01 00:07:52,826 INFO L226 Difference]: Without dead ends: 1518 [2023-04-01 00:07:52,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 00:07:52,831 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 290 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:52,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 317 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2023-04-01 00:07:52,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1492. [2023-04-01 00:07:52,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1188 states have (on average 1.563973063973064) internal successors, (1858), 1361 states have internal predecessors, (1858), 186 states have call successors, (186), 127 states have call predecessors, (186), 117 states have return successors, (233), 147 states have call predecessors, (233), 182 states have call successors, (233) [2023-04-01 00:07:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2277 transitions. [2023-04-01 00:07:52,957 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2277 transitions. Word has length 41 [2023-04-01 00:07:52,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:52,957 INFO L495 AbstractCegarLoop]: Abstraction has 1492 states and 2277 transitions. [2023-04-01 00:07:52,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 00:07:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2277 transitions. [2023-04-01 00:07:52,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 00:07:52,960 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:52,960 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 00:07:52,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:07:52,961 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:52,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:52,961 INFO L85 PathProgramCache]: Analyzing trace with hash -850965723, now seen corresponding path program 1 times [2023-04-01 00:07:52,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:52,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527614776] [2023-04-01 00:07:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:52,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:07:53,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:53,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527614776] [2023-04-01 00:07:53,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527614776] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:53,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:07:53,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:07:53,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710246243] [2023-04-01 00:07:53,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:53,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:53,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:53,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:53,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:07:53,026 INFO L87 Difference]: Start difference. First operand 1492 states and 2277 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 00:07:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:53,221 INFO L93 Difference]: Finished difference Result 2844 states and 4434 transitions. [2023-04-01 00:07:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:07:53,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2023-04-01 00:07:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:53,231 INFO L225 Difference]: With dead ends: 2844 [2023-04-01 00:07:53,231 INFO L226 Difference]: Without dead ends: 2000 [2023-04-01 00:07:53,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:07:53,238 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 39 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:53,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 199 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:07:53,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2023-04-01 00:07:53,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1888. [2023-04-01 00:07:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1533 states have (on average 1.5505544683626875) internal successors, (2377), 1736 states have internal predecessors, (2377), 216 states have call successors, (216), 148 states have call predecessors, (216), 138 states have return successors, (263), 177 states have call predecessors, (263), 212 states have call successors, (263) [2023-04-01 00:07:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2856 transitions. [2023-04-01 00:07:53,384 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2856 transitions. Word has length 42 [2023-04-01 00:07:53,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:53,384 INFO L495 AbstractCegarLoop]: Abstraction has 1888 states and 2856 transitions. [2023-04-01 00:07:53,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 00:07:53,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2856 transitions. [2023-04-01 00:07:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 00:07:53,388 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:53,388 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 00:07:53,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:07:53,389 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:53,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:53,389 INFO L85 PathProgramCache]: Analyzing trace with hash 555848293, now seen corresponding path program 1 times [2023-04-01 00:07:53,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:53,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975744094] [2023-04-01 00:07:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:53,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:07:53,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:53,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975744094] [2023-04-01 00:07:53,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975744094] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:53,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:07:53,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 00:07:53,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543249119] [2023-04-01 00:07:53,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:53,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 00:07:53,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:53,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 00:07:53,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 00:07:53,490 INFO L87 Difference]: Start difference. First operand 1888 states and 2856 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 00:07:53,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:53,829 INFO L93 Difference]: Finished difference Result 3752 states and 5768 transitions. [2023-04-01 00:07:53,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 00:07:53,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2023-04-01 00:07:53,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:53,844 INFO L225 Difference]: With dead ends: 3752 [2023-04-01 00:07:53,844 INFO L226 Difference]: Without dead ends: 2512 [2023-04-01 00:07:53,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-01 00:07:53,856 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 254 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:53,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 355 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2023-04-01 00:07:54,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2460. [2023-04-01 00:07:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 1992 states have (on average 1.553714859437751) internal successors, (3095), 2267 states have internal predecessors, (3095), 285 states have call successors, (285), 188 states have call predecessors, (285), 182 states have return successors, (362), 237 states have call predecessors, (362), 281 states have call successors, (362) [2023-04-01 00:07:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3742 transitions. [2023-04-01 00:07:54,038 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3742 transitions. Word has length 49 [2023-04-01 00:07:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:54,038 INFO L495 AbstractCegarLoop]: Abstraction has 2460 states and 3742 transitions. [2023-04-01 00:07:54,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 00:07:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3742 transitions. [2023-04-01 00:07:54,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 00:07:54,042 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:54,042 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 00:07:54,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:07:54,042 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:54,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:54,043 INFO L85 PathProgramCache]: Analyzing trace with hash -564304258, now seen corresponding path program 1 times [2023-04-01 00:07:54,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:54,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367059805] [2023-04-01 00:07:54,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:54,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:07:54,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:54,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367059805] [2023-04-01 00:07:54,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367059805] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:54,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:07:54,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 00:07:54,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246716472] [2023-04-01 00:07:54,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:54,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 00:07:54,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:54,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 00:07:54,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:07:54,102 INFO L87 Difference]: Start difference. First operand 2460 states and 3742 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 00:07:54,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:54,516 INFO L93 Difference]: Finished difference Result 5479 states and 8594 transitions. [2023-04-01 00:07:54,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 00:07:54,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2023-04-01 00:07:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:54,537 INFO L225 Difference]: With dead ends: 5479 [2023-04-01 00:07:54,537 INFO L226 Difference]: Without dead ends: 3667 [2023-04-01 00:07:54,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:07:54,557 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 153 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:54,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 237 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3667 states. [2023-04-01 00:07:54,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3667 to 3611. [2023-04-01 00:07:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 2933 states have (on average 1.5069894306171157) internal successors, (4420), 3307 states have internal predecessors, (4420), 404 states have call successors, (404), 298 states have call predecessors, (404), 273 states have return successors, (506), 355 states have call predecessors, (506), 400 states have call successors, (506) [2023-04-01 00:07:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 5330 transitions. [2023-04-01 00:07:54,858 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 5330 transitions. Word has length 49 [2023-04-01 00:07:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:54,859 INFO L495 AbstractCegarLoop]: Abstraction has 3611 states and 5330 transitions. [2023-04-01 00:07:54,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 00:07:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 5330 transitions. [2023-04-01 00:07:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 00:07:54,875 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:54,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-04-01 00:07:54,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:07:54,876 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:54,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash 122520109, now seen corresponding path program 1 times [2023-04-01 00:07:54,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:54,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386811838] [2023-04-01 00:07:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:54,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:07:55,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:55,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386811838] [2023-04-01 00:07:55,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386811838] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:07:55,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262747970] [2023-04-01 00:07:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:55,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:07:55,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:07:55,121 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 00:07:55,150 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 00:07:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:55,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 00:07:55,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:07:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:07:55,369 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:07:55,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262747970] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:55,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:07:55,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-04-01 00:07:55,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62812643] [2023-04-01 00:07:55,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:55,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:55,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:55,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:55,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 00:07:55,371 INFO L87 Difference]: Start difference. First operand 3611 states and 5330 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 00:07:55,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:55,762 INFO L93 Difference]: Finished difference Result 8319 states and 12399 transitions. [2023-04-01 00:07:55,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:07:55,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 76 [2023-04-01 00:07:55,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:55,796 INFO L225 Difference]: With dead ends: 8319 [2023-04-01 00:07:55,797 INFO L226 Difference]: Without dead ends: 4721 [2023-04-01 00:07:55,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 00:07:55,833 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 47 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:55,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 206 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:55,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2023-04-01 00:07:56,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 4452. [2023-04-01 00:07:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4452 states, 3635 states have (on average 1.4822558459422284) internal successors, (5388), 4106 states have internal predecessors, (5388), 496 states have call successors, (496), 334 states have call predecessors, (496), 320 states have return successors, (603), 447 states have call predecessors, (603), 492 states have call successors, (603) [2023-04-01 00:07:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4452 states to 4452 states and 6487 transitions. [2023-04-01 00:07:56,214 INFO L78 Accepts]: Start accepts. Automaton has 4452 states and 6487 transitions. Word has length 76 [2023-04-01 00:07:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:56,214 INFO L495 AbstractCegarLoop]: Abstraction has 4452 states and 6487 transitions. [2023-04-01 00:07:56,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 00:07:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 4452 states and 6487 transitions. [2023-04-01 00:07:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 00:07:56,238 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:56,238 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2023-04-01 00:07:56,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 00:07:56,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:07:56,447 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:56,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1304268909, now seen corresponding path program 1 times [2023-04-01 00:07:56,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:56,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699105604] [2023-04-01 00:07:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:56,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 00:07:56,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:56,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699105604] [2023-04-01 00:07:56,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699105604] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:56,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:07:56,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:07:56,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231038920] [2023-04-01 00:07:56,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:56,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:07:56,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:56,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:07:56,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:07:56,547 INFO L87 Difference]: Start difference. First operand 4452 states and 6487 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 00:07:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:57,013 INFO L93 Difference]: Finished difference Result 10291 states and 15118 transitions. [2023-04-01 00:07:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:07:57,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 96 [2023-04-01 00:07:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:57,058 INFO L225 Difference]: With dead ends: 10291 [2023-04-01 00:07:57,058 INFO L226 Difference]: Without dead ends: 5852 [2023-04-01 00:07:57,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:07:57,099 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 42 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:57,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 160 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:07:57,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2023-04-01 00:07:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 5410. [2023-04-01 00:07:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5410 states, 4362 states have (on average 1.4270976616231086) internal successors, (6225), 4950 states have internal predecessors, (6225), 627 states have call successors, (627), 437 states have call predecessors, (627), 420 states have return successors, (730), 578 states have call predecessors, (730), 623 states have call successors, (730) [2023-04-01 00:07:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5410 states to 5410 states and 7582 transitions. [2023-04-01 00:07:57,524 INFO L78 Accepts]: Start accepts. Automaton has 5410 states and 7582 transitions. Word has length 96 [2023-04-01 00:07:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:57,524 INFO L495 AbstractCegarLoop]: Abstraction has 5410 states and 7582 transitions. [2023-04-01 00:07:57,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 00:07:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 5410 states and 7582 transitions. [2023-04-01 00:07:57,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 00:07:57,553 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:57,554 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2023-04-01 00:07:57,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:07:57,554 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:57,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:57,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1836954629, now seen corresponding path program 1 times [2023-04-01 00:07:57,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:57,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783420137] [2023-04-01 00:07:57,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:57,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 00:07:57,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:57,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783420137] [2023-04-01 00:07:57,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783420137] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:57,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:07:57,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:07:57,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986004891] [2023-04-01 00:07:57,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:57,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:07:57,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:57,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:07:57,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:07:57,747 INFO L87 Difference]: Start difference. First operand 5410 states and 7582 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 00:07:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:58,345 INFO L93 Difference]: Finished difference Result 9800 states and 13641 transitions. [2023-04-01 00:07:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:07:58,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 90 [2023-04-01 00:07:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:58,404 INFO L225 Difference]: With dead ends: 9800 [2023-04-01 00:07:58,404 INFO L226 Difference]: Without dead ends: 6798 [2023-04-01 00:07:58,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-04-01 00:07:58,421 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 129 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:58,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 408 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6798 states. [2023-04-01 00:07:58,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6798 to 6459. [2023-04-01 00:07:58,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6459 states, 5245 states have (on average 1.4148713060057196) internal successors, (7421), 5916 states have internal predecessors, (7421), 710 states have call successors, (710), 520 states have call predecessors, (710), 503 states have return successors, (813), 653 states have call predecessors, (813), 706 states have call successors, (813) [2023-04-01 00:07:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6459 states to 6459 states and 8944 transitions. [2023-04-01 00:07:59,020 INFO L78 Accepts]: Start accepts. Automaton has 6459 states and 8944 transitions. Word has length 90 [2023-04-01 00:07:59,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:07:59,022 INFO L495 AbstractCegarLoop]: Abstraction has 6459 states and 8944 transitions. [2023-04-01 00:07:59,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 00:07:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand 6459 states and 8944 transitions. [2023-04-01 00:07:59,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 00:07:59,054 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:07:59,055 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2023-04-01 00:07:59,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 00:07:59,056 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:07:59,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:07:59,057 INFO L85 PathProgramCache]: Analyzing trace with hash -643719277, now seen corresponding path program 1 times [2023-04-01 00:07:59,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:07:59,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205856120] [2023-04-01 00:07:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:07:59,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:07:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:07:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 00:07:59,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:07:59,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205856120] [2023-04-01 00:07:59,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205856120] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:07:59,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:07:59,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:07:59,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298890564] [2023-04-01 00:07:59,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:07:59,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:07:59,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:07:59,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:07:59,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:07:59,253 INFO L87 Difference]: Start difference. First operand 6459 states and 8944 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 00:07:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:07:59,890 INFO L93 Difference]: Finished difference Result 9770 states and 13621 transitions. [2023-04-01 00:07:59,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:07:59,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 91 [2023-04-01 00:07:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:07:59,929 INFO L225 Difference]: With dead ends: 9770 [2023-04-01 00:07:59,929 INFO L226 Difference]: Without dead ends: 6802 [2023-04-01 00:07:59,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-04-01 00:07:59,947 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 179 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:07:59,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 344 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:07:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6802 states. [2023-04-01 00:08:00,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6802 to 6443. [2023-04-01 00:08:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6443 states, 5233 states have (on average 1.4158226638639404) internal successors, (7409), 5902 states have internal predecessors, (7409), 708 states have call successors, (708), 518 states have call predecessors, (708), 501 states have return successors, (811), 647 states have call predecessors, (811), 704 states have call successors, (811) [2023-04-01 00:08:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6443 states to 6443 states and 8928 transitions. [2023-04-01 00:08:00,521 INFO L78 Accepts]: Start accepts. Automaton has 6443 states and 8928 transitions. Word has length 91 [2023-04-01 00:08:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:08:00,522 INFO L495 AbstractCegarLoop]: Abstraction has 6443 states and 8928 transitions. [2023-04-01 00:08:00,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 00:08:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 6443 states and 8928 transitions. [2023-04-01 00:08:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 00:08:00,547 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:08:00,548 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2023-04-01 00:08:00,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 00:08:00,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:08:00,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:08:00,549 INFO L85 PathProgramCache]: Analyzing trace with hash -968571460, now seen corresponding path program 1 times [2023-04-01 00:08:00,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:08:00,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199428392] [2023-04-01 00:08:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:08:00,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:08:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:08:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 00:08:01,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:08:01,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199428392] [2023-04-01 00:08:01,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199428392] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:08:01,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010943180] [2023-04-01 00:08:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:08:01,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:08:01,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:08:01,729 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:08:01,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 00:08:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:08:01,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 67 conjunts are in the unsatisfiable core [2023-04-01 00:08:01,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:08:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:08:02,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 00:08:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 00:08:05,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010943180] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 00:08:05,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574396522] [2023-04-01 00:08:05,054 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2023-04-01 00:08:05,054 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 00:08:05,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 00:08:05,063 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 00:08:05,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 00:08:05,604 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 118 for LOIs [2023-04-01 00:08:05,831 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 110 for LOIs [2023-04-01 00:08:08,474 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 110 for LOIs [2023-04-01 00:08:11,055 INFO L197 IcfgInterpreter]: Interpreting procedure write_back with input of size 63 for LOIs [2023-04-01 00:08:11,078 INFO L197 IcfgInterpreter]: Interpreting procedure write_loop with input of size 70 for LOIs [2023-04-01 00:08:11,282 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 55 for LOIs [2023-04-01 00:08:11,293 INFO L197 IcfgInterpreter]: Interpreting procedure read with input of size 59 for LOIs [2023-04-01 00:08:11,335 INFO L197 IcfgInterpreter]: Interpreting procedure compute1 with input of size 57 for LOIs [2023-04-01 00:08:11,370 INFO L197 IcfgInterpreter]: Interpreting procedure compute2 with input of size 65 for LOIs [2023-04-01 00:08:11,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 94 for LOIs [2023-04-01 00:08:11,467 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 00:08:19,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '115232#(and (= ~wl_i~0 1) (not (= (+ ~t_b~0 1) ~d~0)) (not (= (+ ~t_b~0 2) ~d~0)) (= ~p_in~0 0) (= ~r_i~0 0) (= ~wl_st~0 1) (= ~c1_i~0 1) (= ~c2_i~0 1) (= ~p_out~0 0) (= |#NULL.offset| 0) (= 2 ~wl_pc~0) (= ~wb_i~0 1) (= ~e_p_in~0 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-04-01 00:08:19,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 00:08:19,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 00:08:19,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 46 [2023-04-01 00:08:19,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688187553] [2023-04-01 00:08:19,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 00:08:19,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-01 00:08:19,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:08:19,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-01 00:08:19,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=9731, Unknown=0, NotChecked=0, Total=10506 [2023-04-01 00:08:19,784 INFO L87 Difference]: Start difference. First operand 6443 states and 8928 transitions. Second operand has 46 states, 43 states have (on average 3.883720930232558) internal successors, (167), 37 states have internal predecessors, (167), 17 states have call successors, (29), 15 states have call predecessors, (29), 12 states have return successors, (22), 14 states have call predecessors, (22), 14 states have call successors, (22)