/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 03:05:11,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 03:05:11,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 03:05:11,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 03:05:11,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 03:05:11,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 03:05:11,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 03:05:11,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 03:05:11,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 03:05:11,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 03:05:11,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 03:05:11,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 03:05:11,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 03:05:11,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 03:05:11,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 03:05:11,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 03:05:11,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 03:05:11,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 03:05:11,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 03:05:11,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 03:05:11,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 03:05:11,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 03:05:11,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 03:05:11,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 03:05:11,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 03:05:11,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 03:05:11,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 03:05:11,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 03:05:11,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 03:05:11,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 03:05:11,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 03:05:11,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 03:05:11,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 03:05:11,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 03:05:11,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 03:05:11,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 03:05:11,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 03:05:11,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 03:05:11,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 03:05:11,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 03:05:11,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 03:05:11,347 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 03:05:11,375 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 03:05:11,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 03:05:11,375 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 03:05:11,375 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 03:05:11,376 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 03:05:11,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 03:05:11,377 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 03:05:11,377 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 03:05:11,377 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 03:05:11,377 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 03:05:11,378 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 03:05:11,378 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 03:05:11,378 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 03:05:11,378 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 03:05:11,378 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 03:05:11,378 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 03:05:11,378 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 03:05:11,378 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 03:05:11,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 03:05:11,379 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 03:05:11,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 03:05:11,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 03:05:11,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 03:05:11,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 03:05:11,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 03:05:11,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 03:05:11,380 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 03:05:11,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 03:05:11,380 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 03:05:11,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 03:05:11,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 03:05:11,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 03:05:11,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:05:11,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 03:05:11,381 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 03:05:11,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 03:05:11,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 03:05:11,382 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 03:05:11,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 03:05:11,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 03:05:11,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 03:05:11,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 03:05:11,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 03:05:11,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 03:05:11,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 03:05:11,622 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 03:05:11,622 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 03:05:11,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-03 03:05:12,788 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 03:05:13,002 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 03:05:13,002 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-03 03:05:13,011 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1a641bf8/5619be69c8c24b4cbefbdaa071a64c31/FLAG5e36e3e83 [2023-04-03 03:05:13,024 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1a641bf8/5619be69c8c24b4cbefbdaa071a64c31 [2023-04-03 03:05:13,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 03:05:13,028 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 03:05:13,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 03:05:13,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 03:05:13,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 03:05:13,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:05:13" (1/1) ... [2023-04-03 03:05:13,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@799321a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:05:13, skipping insertion in model container [2023-04-03 03:05:13,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:05:13" (1/1) ... [2023-04-03 03:05:13,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 03:05:13,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 03:05:13,347 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[7981,7994] [2023-04-03 03:05:13,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:05:13,426 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 03:05:13,494 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[7981,7994] [2023-04-03 03:05:13,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:05:13,529 INFO L208 MainTranslator]: Completed translation [2023-04-03 03:05:13,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:05:13 WrapperNode [2023-04-03 03:05:13,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 03:05:13,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 03:05:13,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 03:05:13,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 03:05:13,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:05:13" (1/1) ... [2023-04-03 03:05:13,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:05:13" (1/1) ... [2023-04-03 03:05:13,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:05:13" (1/1) ... [2023-04-03 03:05:13,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:05:13" (1/1) ... [2023-04-03 03:05:13,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:05:13" (1/1) ... [2023-04-03 03:05:13,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:05:13" (1/1) ... [2023-04-03 03:05:13,607 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:05:13" (1/1) ... [2023-04-03 03:05:13,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:05:13" (1/1) ... [2023-04-03 03:05:13,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 03:05:13,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 03:05:13,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 03:05:13,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 03:05:13,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:05:13" (1/1) ... [2023-04-03 03:05:13,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:05:13,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:05:13,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 03:05:13,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 03:05:13,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 03:05:13,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 03:05:13,691 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 03:05:13,691 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 03:05:13,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 03:05:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 03:05:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 03:05:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 03:05:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 03:05:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 03:05:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 03:05:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 03:05:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 03:05:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 03:05:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 03:05:13,693 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 03:05:13,694 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 03:05:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 03:05:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 03:05:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 03:05:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 03:05:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 03:05:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 03:05:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 03:05:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 03:05:13,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 03:05:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 03:05:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 03:05:13,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 03:05:13,826 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 03:05:13,827 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 03:05:14,428 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 03:05:14,567 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 03:05:14,567 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 03:05:14,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:05:14 BoogieIcfgContainer [2023-04-03 03:05:14,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 03:05:14,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 03:05:14,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 03:05:14,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 03:05:14,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 03:05:13" (1/3) ... [2023-04-03 03:05:14,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73582a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:05:14, skipping insertion in model container [2023-04-03 03:05:14,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:05:13" (2/3) ... [2023-04-03 03:05:14,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73582a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:05:14, skipping insertion in model container [2023-04-03 03:05:14,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:05:14" (3/3) ... [2023-04-03 03:05:14,578 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-03 03:05:14,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 03:05:14,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 03:05:14,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 03:05:14,642 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;@296de3a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 03:05:14,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 03:05:14,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 109 states have internal predecessors, (188), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 03:05:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-03 03:05:14,657 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:14,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:14,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:14,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1052134548, now seen corresponding path program 1 times [2023-04-03 03:05:14,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:14,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820808054] [2023-04-03 03:05:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:14,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:15,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:15,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820808054] [2023-04-03 03:05:15,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820808054] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:15,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:15,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:05:15,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687630185] [2023-04-03 03:05:15,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:15,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:05:15,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:15,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:05:15,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:05:15,347 INFO L87 Difference]: Start difference. First operand has 114 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 109 states have internal predecessors, (188), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:15,595 INFO L93 Difference]: Finished difference Result 195 states and 313 transitions. [2023-04-03 03:05:15,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:05:15,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-04-03 03:05:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:15,606 INFO L225 Difference]: With dead ends: 195 [2023-04-03 03:05:15,607 INFO L226 Difference]: Without dead ends: 109 [2023-04-03 03:05:15,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:05:15,614 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 440 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:15,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 168 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:05:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-03 03:05:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-04-03 03:05:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 105 states have internal predecessors, (128), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2023-04-03 03:05:15,669 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 69 [2023-04-03 03:05:15,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:15,670 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2023-04-03 03:05:15,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:15,672 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2023-04-03 03:05:15,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-03 03:05:15,677 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:15,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:15,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 03:05:15,678 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:15,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:15,679 INFO L85 PathProgramCache]: Analyzing trace with hash 118409658, now seen corresponding path program 1 times [2023-04-03 03:05:15,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:15,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744726862] [2023-04-03 03:05:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:15,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:15,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:15,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744726862] [2023-04-03 03:05:15,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744726862] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:15,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:15,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:05:15,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613161049] [2023-04-03 03:05:15,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:15,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:05:15,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:15,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:05:15,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:05:15,926 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:16,078 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2023-04-03 03:05:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:05:16,081 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-03 03:05:16,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:16,089 INFO L225 Difference]: With dead ends: 173 [2023-04-03 03:05:16,089 INFO L226 Difference]: Without dead ends: 109 [2023-04-03 03:05:16,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:05:16,091 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 320 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:16,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 82 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:05:16,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-03 03:05:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-04-03 03:05:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.2) internal successors, (126), 105 states have internal predecessors, (126), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 129 transitions. [2023-04-03 03:05:16,106 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 129 transitions. Word has length 70 [2023-04-03 03:05:16,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:16,107 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 129 transitions. [2023-04-03 03:05:16,107 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 129 transitions. [2023-04-03 03:05:16,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-03 03:05:16,108 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:16,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:16,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 03:05:16,109 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:16,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:16,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1085979805, now seen corresponding path program 1 times [2023-04-03 03:05:16,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:16,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129881080] [2023-04-03 03:05:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:16,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:16,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:16,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129881080] [2023-04-03 03:05:16,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129881080] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:16,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:16,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:05:16,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093704710] [2023-04-03 03:05:16,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:16,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:05:16,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:16,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:05:16,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:05:16,321 INFO L87 Difference]: Start difference. First operand 109 states and 129 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:16,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:16,432 INFO L93 Difference]: Finished difference Result 169 states and 208 transitions. [2023-04-03 03:05:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:05:16,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2023-04-03 03:05:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:16,437 INFO L225 Difference]: With dead ends: 169 [2023-04-03 03:05:16,437 INFO L226 Difference]: Without dead ends: 109 [2023-04-03 03:05:16,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:05:16,443 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 302 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:16,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 90 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:05:16,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-03 03:05:16,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-04-03 03:05:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.180952380952381) internal successors, (124), 105 states have internal predecessors, (124), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2023-04-03 03:05:16,468 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 71 [2023-04-03 03:05:16,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:16,469 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2023-04-03 03:05:16,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2023-04-03 03:05:16,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 03:05:16,470 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:16,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:16,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 03:05:16,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:16,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:16,471 INFO L85 PathProgramCache]: Analyzing trace with hash -114854711, now seen corresponding path program 1 times [2023-04-03 03:05:16,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:16,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437078807] [2023-04-03 03:05:16,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:16,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:16,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:16,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437078807] [2023-04-03 03:05:16,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437078807] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:16,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:16,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:05:16,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752487547] [2023-04-03 03:05:16,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:16,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:05:16,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:16,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:05:16,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:05:16,624 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:16,720 INFO L93 Difference]: Finished difference Result 165 states and 200 transitions. [2023-04-03 03:05:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:05:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-03 03:05:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:16,721 INFO L225 Difference]: With dead ends: 165 [2023-04-03 03:05:16,721 INFO L226 Difference]: Without dead ends: 109 [2023-04-03 03:05:16,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:05:16,723 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 284 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:16,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 98 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:05:16,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-03 03:05:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-04-03 03:05:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.161904761904762) internal successors, (122), 105 states have internal predecessors, (122), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2023-04-03 03:05:16,742 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 72 [2023-04-03 03:05:16,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:16,744 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2023-04-03 03:05:16,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:16,744 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2023-04-03 03:05:16,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 03:05:16,749 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:16,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:16,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 03:05:16,749 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:16,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1528850766, now seen corresponding path program 1 times [2023-04-03 03:05:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:16,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127963139] [2023-04-03 03:05:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:16,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:16,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:16,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127963139] [2023-04-03 03:05:16,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127963139] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:16,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:16,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:05:16,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401417545] [2023-04-03 03:05:16,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:16,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:05:16,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:16,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:05:16,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:05:16,864 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:16,961 INFO L93 Difference]: Finished difference Result 161 states and 192 transitions. [2023-04-03 03:05:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:05:16,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-03 03:05:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:16,963 INFO L225 Difference]: With dead ends: 161 [2023-04-03 03:05:16,963 INFO L226 Difference]: Without dead ends: 109 [2023-04-03 03:05:16,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:05:16,966 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 266 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:16,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 106 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:05:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-03 03:05:17,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-04-03 03:05:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 105 states have internal predecessors, (120), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2023-04-03 03:05:17,004 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 73 [2023-04-03 03:05:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:17,004 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2023-04-03 03:05:17,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2023-04-03 03:05:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 03:05:17,005 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:17,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:17,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 03:05:17,005 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:17,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:17,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1793235880, now seen corresponding path program 1 times [2023-04-03 03:05:17,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:17,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496422867] [2023-04-03 03:05:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:23,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:23,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496422867] [2023-04-03 03:05:23,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496422867] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:23,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:23,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2023-04-03 03:05:23,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13898773] [2023-04-03 03:05:23,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:23,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-03 03:05:23,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:23,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-03 03:05:23,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2023-04-03 03:05:23,944 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:30,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:30,162 INFO L93 Difference]: Finished difference Result 263 states and 329 transitions. [2023-04-03 03:05:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-03 03:05:30,163 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-03 03:05:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:30,165 INFO L225 Difference]: With dead ends: 263 [2023-04-03 03:05:30,165 INFO L226 Difference]: Without dead ends: 223 [2023-04-03 03:05:30,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=974, Invalid=2808, Unknown=0, NotChecked=0, Total=3782 [2023-04-03 03:05:30,167 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 729 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:30,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 850 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-03 03:05:30,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-04-03 03:05:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 144. [2023-04-03 03:05:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 140 states have internal predecessors, (167), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2023-04-03 03:05:30,193 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 74 [2023-04-03 03:05:30,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:30,195 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2023-04-03 03:05:30,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:30,195 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2023-04-03 03:05:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 03:05:30,196 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:30,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:30,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 03:05:30,199 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:30,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:30,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1329886932, now seen corresponding path program 1 times [2023-04-03 03:05:30,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:30,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768050714] [2023-04-03 03:05:30,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:30,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:37,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:37,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768050714] [2023-04-03 03:05:37,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768050714] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:37,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:37,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2023-04-03 03:05:37,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242296016] [2023-04-03 03:05:37,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:37,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-03 03:05:37,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:37,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-03 03:05:37,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1366, Unknown=0, NotChecked=0, Total=1560 [2023-04-03 03:05:37,899 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:48,357 INFO L93 Difference]: Finished difference Result 374 states and 478 transitions. [2023-04-03 03:05:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-03 03:05:48,357 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-03 03:05:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:48,360 INFO L225 Difference]: With dead ends: 374 [2023-04-03 03:05:48,360 INFO L226 Difference]: Without dead ends: 299 [2023-04-03 03:05:48,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1271, Invalid=3985, Unknown=0, NotChecked=0, Total=5256 [2023-04-03 03:05:48,366 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 994 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:48,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 980 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1776 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-03 03:05:48,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-04-03 03:05:48,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 182. [2023-04-03 03:05:48,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 178 states have (on average 1.2247191011235956) internal successors, (218), 178 states have internal predecessors, (218), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 221 transitions. [2023-04-03 03:05:48,408 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 221 transitions. Word has length 76 [2023-04-03 03:05:48,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:48,408 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 221 transitions. [2023-04-03 03:05:48,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 221 transitions. [2023-04-03 03:05:48,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 03:05:48,410 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:48,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:48,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 03:05:48,410 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:48,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:48,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1124895061, now seen corresponding path program 1 times [2023-04-03 03:05:48,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:48,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613973286] [2023-04-03 03:05:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:48,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:48,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:48,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613973286] [2023-04-03 03:05:48,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613973286] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:48,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:48,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:05:48,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948661408] [2023-04-03 03:05:48,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:48,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:05:48,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:05:48,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:05:48,474 INFO L87 Difference]: Start difference. First operand 182 states and 221 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:48,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:48,533 INFO L93 Difference]: Finished difference Result 296 states and 374 transitions. [2023-04-03 03:05:48,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:05:48,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-03 03:05:48,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:48,535 INFO L225 Difference]: With dead ends: 296 [2023-04-03 03:05:48,535 INFO L226 Difference]: Without dead ends: 181 [2023-04-03 03:05:48,536 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 [2023-04-03 03:05:48,537 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:48,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 217 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:05:48,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-04-03 03:05:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-04-03 03:05:48,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 177 states have (on average 1.2146892655367232) internal successors, (215), 177 states have internal predecessors, (215), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 218 transitions. [2023-04-03 03:05:48,581 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 218 transitions. Word has length 76 [2023-04-03 03:05:48,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:48,581 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 218 transitions. [2023-04-03 03:05:48,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:48,581 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 218 transitions. [2023-04-03 03:05:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 03:05:48,582 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:48,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:48,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 03:05:48,582 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:48,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:48,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1725087344, now seen corresponding path program 1 times [2023-04-03 03:05:48,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:48,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575990084] [2023-04-03 03:05:48,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:48,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:48,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:48,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575990084] [2023-04-03 03:05:48,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575990084] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:48,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:48,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:05:48,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219500267] [2023-04-03 03:05:48,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:48,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:05:48,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:48,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:05:48,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:05:48,788 INFO L87 Difference]: Start difference. First operand 181 states and 218 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:48,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:48,888 INFO L93 Difference]: Finished difference Result 220 states and 266 transitions. [2023-04-03 03:05:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 03:05:48,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-03 03:05:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:48,890 INFO L225 Difference]: With dead ends: 220 [2023-04-03 03:05:48,890 INFO L226 Difference]: Without dead ends: 218 [2023-04-03 03:05:48,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-03 03:05:48,892 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 94 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:48,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 437 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:05:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-04-03 03:05:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 181. [2023-04-03 03:05:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 177 states have (on average 1.2090395480225988) internal successors, (214), 177 states have internal predecessors, (214), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 217 transitions. [2023-04-03 03:05:48,942 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 217 transitions. Word has length 77 [2023-04-03 03:05:48,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:48,942 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 217 transitions. [2023-04-03 03:05:48,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:48,942 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 217 transitions. [2023-04-03 03:05:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-03 03:05:48,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:48,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:48,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 03:05:48,943 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:48,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:48,944 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301578, now seen corresponding path program 1 times [2023-04-03 03:05:48,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:48,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677279058] [2023-04-03 03:05:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:48,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:49,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:49,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677279058] [2023-04-03 03:05:49,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677279058] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:49,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:49,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:05:49,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043052711] [2023-04-03 03:05:49,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:49,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:05:49,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:49,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:05:49,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:05:49,088 INFO L87 Difference]: Start difference. First operand 181 states and 217 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:49,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:49,170 INFO L93 Difference]: Finished difference Result 353 states and 445 transitions. [2023-04-03 03:05:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:05:49,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2023-04-03 03:05:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:49,172 INFO L225 Difference]: With dead ends: 353 [2023-04-03 03:05:49,172 INFO L226 Difference]: Without dead ends: 241 [2023-04-03 03:05:49,173 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 [2023-04-03 03:05:49,173 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 45 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:49,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 246 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:05:49,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-04-03 03:05:49,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 227. [2023-04-03 03:05:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 223 states have (on average 1.2197309417040358) internal successors, (272), 223 states have internal predecessors, (272), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 275 transitions. [2023-04-03 03:05:49,233 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 275 transitions. Word has length 92 [2023-04-03 03:05:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:49,234 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 275 transitions. [2023-04-03 03:05:49,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 275 transitions. [2023-04-03 03:05:49,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-03 03:05:49,235 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:49,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:49,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 03:05:49,235 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:49,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:49,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2097554828, now seen corresponding path program 1 times [2023-04-03 03:05:49,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:49,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42223196] [2023-04-03 03:05:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:49,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:49,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:49,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42223196] [2023-04-03 03:05:49,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42223196] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:49,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:49,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:05:49,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661056969] [2023-04-03 03:05:49,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:49,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:05:49,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:49,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:05:49,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:05:49,354 INFO L87 Difference]: Start difference. First operand 227 states and 275 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:49,457 INFO L93 Difference]: Finished difference Result 491 states and 623 transitions. [2023-04-03 03:05:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:05:49,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2023-04-03 03:05:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:49,459 INFO L225 Difference]: With dead ends: 491 [2023-04-03 03:05:49,459 INFO L226 Difference]: Without dead ends: 337 [2023-04-03 03:05:49,460 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 [2023-04-03 03:05:49,460 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 40 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:49,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 239 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:05:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-04-03 03:05:49,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 319. [2023-04-03 03:05:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 315 states have (on average 1.2476190476190476) internal successors, (393), 315 states have internal predecessors, (393), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 396 transitions. [2023-04-03 03:05:49,537 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 396 transitions. Word has length 95 [2023-04-03 03:05:49,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:49,538 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 396 transitions. [2023-04-03 03:05:49,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:49,538 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 396 transitions. [2023-04-03 03:05:49,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-03 03:05:49,539 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:49,539 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:49,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 03:05:49,539 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:49,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:49,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1487622805, now seen corresponding path program 1 times [2023-04-03 03:05:49,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:49,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901670279] [2023-04-03 03:05:49,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:49,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:49,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:49,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901670279] [2023-04-03 03:05:49,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901670279] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:49,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:49,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:05:49,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794648575] [2023-04-03 03:05:49,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:49,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:05:49,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:49,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:05:49,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:05:49,665 INFO L87 Difference]: Start difference. First operand 319 states and 396 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:49,816 INFO L93 Difference]: Finished difference Result 779 states and 1002 transitions. [2023-04-03 03:05:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:05:49,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2023-04-03 03:05:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:49,821 INFO L225 Difference]: With dead ends: 779 [2023-04-03 03:05:49,821 INFO L226 Difference]: Without dead ends: 533 [2023-04-03 03:05:49,822 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 [2023-04-03 03:05:49,822 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 35 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:49,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 232 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:05:49,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-04-03 03:05:49,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 507. [2023-04-03 03:05:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 503 states have (on average 1.2703777335984094) internal successors, (639), 503 states have internal predecessors, (639), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 642 transitions. [2023-04-03 03:05:49,963 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 642 transitions. Word has length 98 [2023-04-03 03:05:49,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:49,963 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 642 transitions. [2023-04-03 03:05:49,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 642 transitions. [2023-04-03 03:05:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-03 03:05:49,964 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:49,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:49,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 03:05:49,965 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:49,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:49,965 INFO L85 PathProgramCache]: Analyzing trace with hash 917934900, now seen corresponding path program 1 times [2023-04-03 03:05:49,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:49,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491115737] [2023-04-03 03:05:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:49,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:50,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:50,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491115737] [2023-04-03 03:05:50,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491115737] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:50,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:50,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:05:50,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141811095] [2023-04-03 03:05:50,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:50,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:05:50,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:50,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:05:50,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:05:50,085 INFO L87 Difference]: Start difference. First operand 507 states and 642 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:50,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:50,325 INFO L93 Difference]: Finished difference Result 1355 states and 1756 transitions. [2023-04-03 03:05:50,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:05:50,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2023-04-03 03:05:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:50,329 INFO L225 Difference]: With dead ends: 1355 [2023-04-03 03:05:50,329 INFO L226 Difference]: Without dead ends: 921 [2023-04-03 03:05:50,331 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 [2023-04-03 03:05:50,331 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 30 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:50,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:05:50,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-03 03:05:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 879. [2023-04-03 03:05:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 875 states have (on average 1.2834285714285714) internal successors, (1123), 875 states have internal predecessors, (1123), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1126 transitions. [2023-04-03 03:05:50,558 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1126 transitions. Word has length 101 [2023-04-03 03:05:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:50,558 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1126 transitions. [2023-04-03 03:05:50,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1126 transitions. [2023-04-03 03:05:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-03 03:05:50,559 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:50,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:50,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 03:05:50,559 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:50,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:50,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1605278605, now seen corresponding path program 1 times [2023-04-03 03:05:50,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:50,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339742572] [2023-04-03 03:05:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:50,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:50,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:50,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339742572] [2023-04-03 03:05:50,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339742572] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:50,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:50,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:05:50,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714793945] [2023-04-03 03:05:50,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:50,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:05:50,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:50,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:05:50,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:05:50,681 INFO L87 Difference]: Start difference. First operand 879 states and 1126 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:51,125 INFO L93 Difference]: Finished difference Result 2483 states and 3224 transitions. [2023-04-03 03:05:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:05:51,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2023-04-03 03:05:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:51,132 INFO L225 Difference]: With dead ends: 2483 [2023-04-03 03:05:51,132 INFO L226 Difference]: Without dead ends: 1677 [2023-04-03 03:05:51,133 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 [2023-04-03 03:05:51,134 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 25 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:51,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 214 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:05:51,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2023-04-03 03:05:51,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1603. [2023-04-03 03:05:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1599 states have (on average 1.2876797998749219) internal successors, (2059), 1599 states have internal predecessors, (2059), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:51,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2062 transitions. [2023-04-03 03:05:51,541 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2062 transitions. Word has length 104 [2023-04-03 03:05:51,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:51,542 INFO L495 AbstractCegarLoop]: Abstraction has 1603 states and 2062 transitions. [2023-04-03 03:05:51,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:51,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2062 transitions. [2023-04-03 03:05:51,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-03 03:05:51,543 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:51,543 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:51,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 03:05:51,543 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:51,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:51,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1210360295, now seen corresponding path program 1 times [2023-04-03 03:05:51,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:51,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444766906] [2023-04-03 03:05:51,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:51,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:05:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-03 03:05:51,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:05:51,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444766906] [2023-04-03 03:05:51,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444766906] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:05:51,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:05:51,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 03:05:51,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311058330] [2023-04-03 03:05:51,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:05:51,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 03:05:51,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:05:52,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 03:05:52,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-04-03 03:05:52,001 INFO L87 Difference]: Start difference. First operand 1603 states and 2062 transitions. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 10 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:52,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:05:52,951 INFO L93 Difference]: Finished difference Result 4124 states and 5373 transitions. [2023-04-03 03:05:52,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 03:05:52,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 10 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2023-04-03 03:05:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:05:52,960 INFO L225 Difference]: With dead ends: 4124 [2023-04-03 03:05:52,960 INFO L226 Difference]: Without dead ends: 2594 [2023-04-03 03:05:52,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2023-04-03 03:05:52,964 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 368 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:05:52,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 230 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:05:52,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2023-04-03 03:05:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2592. [2023-04-03 03:05:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2588 states have (on average 1.2874806800618237) internal successors, (3332), 2588 states have internal predecessors, (3332), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 3335 transitions. [2023-04-03 03:05:53,570 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 3335 transitions. Word has length 125 [2023-04-03 03:05:53,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:05:53,571 INFO L495 AbstractCegarLoop]: Abstraction has 2592 states and 3335 transitions. [2023-04-03 03:05:53,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 10 states have internal predecessors, (115), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:05:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 3335 transitions. [2023-04-03 03:05:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-03 03:05:53,572 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:05:53,573 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:05:53,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 03:05:53,573 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:05:53,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:05:53,573 INFO L85 PathProgramCache]: Analyzing trace with hash -484988062, now seen corresponding path program 1 times [2023-04-03 03:05:53,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:05:53,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442814113] [2023-04-03 03:05:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:05:53,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:05:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:06:35,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:06:35,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442814113] [2023-04-03 03:06:35,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442814113] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:06:35,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531192022] [2023-04-03 03:06:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:06:35,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:06:35,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:06:35,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 03:06:35,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 03:06:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:06:36,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 129 conjunts are in the unsatisfiable core [2023-04-03 03:06:36,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:08:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:08:05,417 INFO L327 TraceCheckSpWp]: Computing backward predicates...