/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-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:52:44,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:52:44,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:52:44,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:52:44,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:52:44,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:52:44,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:52:44,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:52:44,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:52:44,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:52:44,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:52:44,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:52:44,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:52:44,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:52:44,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:52:44,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:52:44,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:52:44,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:52:44,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:52:44,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:52:44,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:52:44,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:52:44,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:52:44,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:52:44,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:52:44,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:52:44,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:52:44,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:52:44,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:52:44,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:52:44,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:52:44,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:52:44,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:52:44,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:52:44,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:52:44,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:52:44,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:52:44,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:52:44,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:52:44,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:52:44,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:52:44,609 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 02:52:44,633 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:52:44,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:52:44,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:52:44,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:52:44,634 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:52:44,634 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:52:44,634 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:52:44,634 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:52:44,634 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:52:44,635 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:52:44,635 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:52:44,635 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:52:44,635 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:52:44,635 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:52:44,635 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:52:44,635 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:52:44,636 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:52:44,636 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:52:44,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:52:44,636 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:52:44,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:52:44,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:52:44,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:52:44,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:52:44,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:52:44,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:52:44,637 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:52:44,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:52:44,637 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:52:44,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:52:44,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:52:44,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:52:44,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:52:44,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:52:44,638 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:52:44,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:52:44,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:52:44,638 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:52:44,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:52:44,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:52:44,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:52:44,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:52:44,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:52:44,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:52:44,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:52:44,843 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:52:44,844 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:52:44,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:52:45,817 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:52:46,002 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:52:46,002 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:52:46,009 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8b987d7a/cb31bb2cdd774da7b6100cb843033a16/FLAGb999375cb [2023-04-03 02:52:46,018 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8b987d7a/cb31bb2cdd774da7b6100cb843033a16 [2023-04-03 02:52:46,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:52:46,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:52:46,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:52:46,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:52:46,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:52:46,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:52:46" (1/1) ... [2023-04-03 02:52:46,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@562fd1b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:46, skipping insertion in model container [2023-04-03 02:52:46,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:52:46" (1/1) ... [2023-04-03 02:52:46,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:52:46,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:52:46,205 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-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7401,7414] [2023-04-03 02:52:46,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:52:46,241 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:52:46,272 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-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7401,7414] [2023-04-03 02:52:46,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:52:46,301 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:52:46,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:46 WrapperNode [2023-04-03 02:52:46,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:52:46,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:52:46,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:52:46,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:52:46,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:46" (1/1) ... [2023-04-03 02:52:46,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:46" (1/1) ... [2023-04-03 02:52:46,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:46" (1/1) ... [2023-04-03 02:52:46,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:46" (1/1) ... [2023-04-03 02:52:46,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:46" (1/1) ... [2023-04-03 02:52:46,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:46" (1/1) ... [2023-04-03 02:52:46,336 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:46" (1/1) ... [2023-04-03 02:52:46,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:46" (1/1) ... [2023-04-03 02:52:46,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:52:46,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:52:46,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:52:46,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:52:46,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:46" (1/1) ... [2023-04-03 02:52:46,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:52:46,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:52:46,367 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 02:52:46,373 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 02:52:46,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:52:46,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:52:46,392 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:52:46,392 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:52:46,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:52:46,393 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:52:46,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:52:46,393 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:52:46,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:52:46,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:52:46,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:52:46,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:52:46,393 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:52:46,393 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:52:46,393 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:52:46,393 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:52:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:52:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:52:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:52:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:52:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:52:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-03 02:52:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:52:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:52:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:52:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:52:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:52:46,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:52:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:52:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:52:46,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:52:46,519 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:52:46,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:52:47,082 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:52:47,212 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:52:47,212 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:52:47,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:52:47 BoogieIcfgContainer [2023-04-03 02:52:47,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:52:47,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:52:47,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:52:47,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:52:47,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:52:46" (1/3) ... [2023-04-03 02:52:47,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fb299e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:52:47, skipping insertion in model container [2023-04-03 02:52:47,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:46" (2/3) ... [2023-04-03 02:52:47,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fb299e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:52:47, skipping insertion in model container [2023-04-03 02:52:47,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:52:47" (3/3) ... [2023-04-03 02:52:47,222 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:52:47,234 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:52:47,235 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:52:47,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:52:47,296 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;@3f8b826c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:52:47,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:52:47,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 122 states have (on average 1.680327868852459) internal successors, (205), 123 states have internal predecessors, (205), 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 02:52:47,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:52:47,312 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:47,313 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] [2023-04-03 02:52:47,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:47,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:47,319 INFO L85 PathProgramCache]: Analyzing trace with hash -343621492, now seen corresponding path program 1 times [2023-04-03 02:52:47,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:47,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603534695] [2023-04-03 02:52:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:47,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:47,721 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 02:52:47,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:47,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603534695] [2023-04-03 02:52:47,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603534695] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:47,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:47,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:52:47,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730361828] [2023-04-03 02:52:47,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:47,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:52:47,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:47,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:52:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:52:47,749 INFO L87 Difference]: Start difference. First operand has 128 states, 122 states have (on average 1.680327868852459) internal successors, (205), 123 states have internal predecessors, (205), 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 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 02:52:47,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:47,817 INFO L93 Difference]: Finished difference Result 284 states and 440 transitions. [2023-04-03 02:52:47,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:52:47,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 62 [2023-04-03 02:52:47,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:47,825 INFO L225 Difference]: With dead ends: 284 [2023-04-03 02:52:47,826 INFO L226 Difference]: Without dead ends: 195 [2023-04-03 02:52:47,828 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 02:52:47,830 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 154 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:47,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 413 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:52:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-04-03 02:52:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2023-04-03 02:52:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 189 states have (on average 1.402116402116402) internal successors, (265), 189 states have internal predecessors, (265), 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 02:52:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 268 transitions. [2023-04-03 02:52:47,885 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 268 transitions. Word has length 62 [2023-04-03 02:52:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:47,885 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 268 transitions. [2023-04-03 02:52:47,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 02:52:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 268 transitions. [2023-04-03 02:52:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 02:52:47,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:47,887 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] [2023-04-03 02:52:47,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:52:47,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:47,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:47,888 INFO L85 PathProgramCache]: Analyzing trace with hash 178721887, now seen corresponding path program 1 times [2023-04-03 02:52:47,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:47,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648650143] [2023-04-03 02:52:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:47,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:48,018 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 02:52:48,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:48,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648650143] [2023-04-03 02:52:48,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648650143] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:48,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:48,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:52:48,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571778827] [2023-04-03 02:52:48,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:48,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:52:48,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:48,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:52:48,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:52:48,023 INFO L87 Difference]: Start difference. First operand 193 states and 268 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 02:52:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:48,094 INFO L93 Difference]: Finished difference Result 463 states and 676 transitions. [2023-04-03 02:52:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:52:48,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 64 [2023-04-03 02:52:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:48,096 INFO L225 Difference]: With dead ends: 463 [2023-04-03 02:52:48,096 INFO L226 Difference]: Without dead ends: 317 [2023-04-03 02:52:48,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:52:48,098 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 111 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:48,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 334 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:52:48,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-04-03 02:52:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 315. [2023-04-03 02:52:48,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 311 states have (on average 1.4437299035369775) internal successors, (449), 311 states have internal predecessors, (449), 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 02:52:48,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 452 transitions. [2023-04-03 02:52:48,147 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 452 transitions. Word has length 64 [2023-04-03 02:52:48,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:48,147 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 452 transitions. [2023-04-03 02:52:48,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 02:52:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 452 transitions. [2023-04-03 02:52:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-03 02:52:48,149 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:48,149 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] [2023-04-03 02:52:48,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:52:48,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:48,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:48,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1299393462, now seen corresponding path program 1 times [2023-04-03 02:52:48,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:48,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985052476] [2023-04-03 02:52:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:48,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:48,252 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 02:52:48,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:48,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985052476] [2023-04-03 02:52:48,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985052476] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:48,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:48,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:52:48,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207730459] [2023-04-03 02:52:48,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:48,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:52:48,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:48,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:52:48,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:52:48,256 INFO L87 Difference]: Start difference. First operand 315 states and 452 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 02:52:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:48,331 INFO L93 Difference]: Finished difference Result 807 states and 1194 transitions. [2023-04-03 02:52:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:52:48,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 67 [2023-04-03 02:52:48,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:48,336 INFO L225 Difference]: With dead ends: 807 [2023-04-03 02:52:48,336 INFO L226 Difference]: Without dead ends: 539 [2023-04-03 02:52:48,341 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 02:52:48,343 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 106 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:48,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 319 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:52:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-04-03 02:52:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 537. [2023-04-03 02:52:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 533 states have (on average 1.4652908067542214) internal successors, (781), 533 states have internal predecessors, (781), 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 02:52:48,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 784 transitions. [2023-04-03 02:52:48,399 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 784 transitions. Word has length 67 [2023-04-03 02:52:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:48,400 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 784 transitions. [2023-04-03 02:52:48,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 02:52:48,400 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 784 transitions. [2023-04-03 02:52:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-03 02:52:48,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:48,405 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 02:52:48,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:52:48,406 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:48,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:48,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1440563021, now seen corresponding path program 1 times [2023-04-03 02:52:48,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:48,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062058422] [2023-04-03 02:52:48,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:48,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:48,518 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 02:52:48,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:48,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062058422] [2023-04-03 02:52:48,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062058422] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:48,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:48,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:52:48,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051036598] [2023-04-03 02:52:48,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:48,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:52:48,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:48,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:52:48,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:52:48,520 INFO L87 Difference]: Start difference. First operand 537 states and 784 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 02:52:48,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:48,668 INFO L93 Difference]: Finished difference Result 1429 states and 2122 transitions. [2023-04-03 02:52:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:52:48,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 70 [2023-04-03 02:52:48,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:48,675 INFO L225 Difference]: With dead ends: 1429 [2023-04-03 02:52:48,675 INFO L226 Difference]: Without dead ends: 939 [2023-04-03 02:52:48,676 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 02:52:48,684 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 101 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:48,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 304 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:52:48,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2023-04-03 02:52:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 937. [2023-04-03 02:52:48,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 933 states have (on average 1.4715969989281887) internal successors, (1373), 933 states have internal predecessors, (1373), 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 02:52:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1376 transitions. [2023-04-03 02:52:48,777 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1376 transitions. Word has length 70 [2023-04-03 02:52:48,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:48,778 INFO L495 AbstractCegarLoop]: Abstraction has 937 states and 1376 transitions. [2023-04-03 02:52:48,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 02:52:48,778 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1376 transitions. [2023-04-03 02:52:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:52:48,780 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:48,780 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 02:52:48,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:52:48,780 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:48,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:48,781 INFO L85 PathProgramCache]: Analyzing trace with hash 38229249, now seen corresponding path program 1 times [2023-04-03 02:52:48,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:48,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014222953] [2023-04-03 02:52:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:48,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:48,857 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 02:52:48,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:48,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014222953] [2023-04-03 02:52:48,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014222953] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:48,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:48,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:52:48,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396249470] [2023-04-03 02:52:48,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:48,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:52:48,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:48,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:52:48,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:52:48,865 INFO L87 Difference]: Start difference. First operand 937 states and 1376 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 02:52:49,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:49,083 INFO L93 Difference]: Finished difference Result 2541 states and 3762 transitions. [2023-04-03 02:52:49,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:52:49,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 73 [2023-04-03 02:52:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:49,090 INFO L225 Difference]: With dead ends: 2541 [2023-04-03 02:52:49,090 INFO L226 Difference]: Without dead ends: 1651 [2023-04-03 02:52:49,091 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 02:52:49,092 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 96 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:49,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 289 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:52:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2023-04-03 02:52:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1649. [2023-04-03 02:52:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1645 states have (on average 1.466869300911854) internal successors, (2413), 1645 states have internal predecessors, (2413), 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 02:52:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2416 transitions. [2023-04-03 02:52:49,259 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2416 transitions. Word has length 73 [2023-04-03 02:52:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:49,260 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2416 transitions. [2023-04-03 02:52:49,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 02:52:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2416 transitions. [2023-04-03 02:52:49,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:52:49,260 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:49,260 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 02:52:49,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:52:49,261 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:49,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:49,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1628149308, now seen corresponding path program 1 times [2023-04-03 02:52:49,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:49,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65769646] [2023-04-03 02:52:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:49,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:49,348 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 02:52:49,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:49,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65769646] [2023-04-03 02:52:49,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65769646] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:49,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:49,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:52:49,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850352768] [2023-04-03 02:52:49,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:49,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:52:49,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:49,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:52:49,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:52:49,350 INFO L87 Difference]: Start difference. First operand 1649 states and 2416 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 02:52:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:49,632 INFO L93 Difference]: Finished difference Result 4501 states and 6610 transitions. [2023-04-03 02:52:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:52:49,633 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 02:52:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:49,642 INFO L225 Difference]: With dead ends: 4501 [2023-04-03 02:52:49,642 INFO L226 Difference]: Without dead ends: 2899 [2023-04-03 02:52:49,645 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 02:52:49,646 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 91 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:49,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 274 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:52:49,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2023-04-03 02:52:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2897. [2023-04-03 02:52:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 2893 states have (on average 1.453508468717594) internal successors, (4205), 2893 states have internal predecessors, (4205), 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 02:52:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 4208 transitions. [2023-04-03 02:52:50,005 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 4208 transitions. Word has length 76 [2023-04-03 02:52:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:50,005 INFO L495 AbstractCegarLoop]: Abstraction has 2897 states and 4208 transitions. [2023-04-03 02:52:50,005 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 02:52:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 4208 transitions. [2023-04-03 02:52:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-03 02:52:50,009 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:50,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:52:50,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:52:50,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:50,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:50,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1042290266, now seen corresponding path program 1 times [2023-04-03 02:52:50,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:50,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639695459] [2023-04-03 02:52:50,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:50,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:50,225 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 02:52:50,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:50,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639695459] [2023-04-03 02:52:50,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639695459] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:50,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:50,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:52:50,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071220324] [2023-04-03 02:52:50,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:50,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:52:50,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:50,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:52:50,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:52:50,227 INFO L87 Difference]: Start difference. First operand 2897 states and 4208 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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 02:52:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:52,196 INFO L93 Difference]: Finished difference Result 17277 states and 25014 transitions. [2023-04-03 02:52:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:52:52,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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 79 [2023-04-03 02:52:52,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:52,243 INFO L225 Difference]: With dead ends: 17277 [2023-04-03 02:52:52,244 INFO L226 Difference]: Without dead ends: 14427 [2023-04-03 02:52:52,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:52:52,253 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 548 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:52,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1173 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:52:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2023-04-03 02:52:54,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 14417. [2023-04-03 02:52:54,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14417 states, 14413 states have (on average 1.4440435717754805) internal successors, (20813), 14413 states have internal predecessors, (20813), 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 02:52:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14417 states to 14417 states and 20816 transitions. [2023-04-03 02:52:54,195 INFO L78 Accepts]: Start accepts. Automaton has 14417 states and 20816 transitions. Word has length 79 [2023-04-03 02:52:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:54,195 INFO L495 AbstractCegarLoop]: Abstraction has 14417 states and 20816 transitions. [2023-04-03 02:52:54,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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 02:52:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 14417 states and 20816 transitions. [2023-04-03 02:52:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-03 02:52:54,196 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:54,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:52:54,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:52:54,197 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:54,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:54,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1189311889, now seen corresponding path program 1 times [2023-04-03 02:52:54,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:54,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429792365] [2023-04-03 02:52:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:54,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:54,283 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 02:52:54,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:54,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429792365] [2023-04-03 02:52:54,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429792365] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:54,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:54,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:52:54,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495155349] [2023-04-03 02:52:54,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:54,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:52:54,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:54,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:52:54,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:52:54,285 INFO L87 Difference]: Start difference. First operand 14417 states and 20816 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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 02:52:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:57,541 INFO L93 Difference]: Finished difference Result 36898 states and 53490 transitions. [2023-04-03 02:52:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:52:57,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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 81 [2023-04-03 02:52:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:57,606 INFO L225 Difference]: With dead ends: 36898 [2023-04-03 02:52:57,607 INFO L226 Difference]: Without dead ends: 22528 [2023-04-03 02:52:57,631 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 02:52:57,632 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 628 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:57,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 170 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:52:57,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22528 states. [2023-04-03 02:53:00,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22528 to 22526. [2023-04-03 02:53:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22526 states, 22522 states have (on average 1.4384601722759969) internal successors, (32397), 22522 states have internal predecessors, (32397), 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 02:53:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22526 states to 22526 states and 32400 transitions. [2023-04-03 02:53:00,515 INFO L78 Accepts]: Start accepts. Automaton has 22526 states and 32400 transitions. Word has length 81 [2023-04-03 02:53:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:00,515 INFO L495 AbstractCegarLoop]: Abstraction has 22526 states and 32400 transitions. [2023-04-03 02:53:00,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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 02:53:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand 22526 states and 32400 transitions. [2023-04-03 02:53:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-03 02:53:00,517 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:00,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:00,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:53:00,517 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:00,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:00,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1325073100, now seen corresponding path program 1 times [2023-04-03 02:53:00,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:00,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152580805] [2023-04-03 02:53:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:00,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:00,914 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 02:53:00,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:00,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152580805] [2023-04-03 02:53:00,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152580805] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:00,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:00,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:53:00,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341677732] [2023-04-03 02:53:00,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:00,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:53:00,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:00,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:53:00,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:53:00,917 INFO L87 Difference]: Start difference. First operand 22526 states and 32400 transitions. Second operand has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 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 02:53:07,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:07,372 INFO L93 Difference]: Finished difference Result 47460 states and 68793 transitions. [2023-04-03 02:53:07,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:53:07,375 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 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 81 [2023-04-03 02:53:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:07,474 INFO L225 Difference]: With dead ends: 47460 [2023-04-03 02:53:07,474 INFO L226 Difference]: Without dead ends: 47458 [2023-04-03 02:53:07,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:53:07,491 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 1895 mSDsluCounter, 2384 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1895 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:07,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1895 Valid, 2936 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:53:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47458 states. [2023-04-03 02:53:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47458 to 23045. [2023-04-03 02:53:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23045 states, 23041 states have (on average 1.4389566425068356) internal successors, (33155), 23041 states have internal predecessors, (33155), 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 02:53:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23045 states to 23045 states and 33158 transitions. [2023-04-03 02:53:11,082 INFO L78 Accepts]: Start accepts. Automaton has 23045 states and 33158 transitions. Word has length 81 [2023-04-03 02:53:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:11,083 INFO L495 AbstractCegarLoop]: Abstraction has 23045 states and 33158 transitions. [2023-04-03 02:53:11,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 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 02:53:11,083 INFO L276 IsEmpty]: Start isEmpty. Operand 23045 states and 33158 transitions. [2023-04-03 02:53:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-03 02:53:11,086 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:11,086 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:53:11,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:53:11,086 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:11,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:11,086 INFO L85 PathProgramCache]: Analyzing trace with hash -12390308, now seen corresponding path program 1 times [2023-04-03 02:53:11,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:11,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484926448] [2023-04-03 02:53:11,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:11,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:12,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:12,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484926448] [2023-04-03 02:53:12,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484926448] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:53:12,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21654988] [2023-04-03 02:53:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:12,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:53:12,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:53:12,630 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 02:53:12,633 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 02:53:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:12,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 74 conjunts are in the unsatisfiable core [2023-04-03 02:53:12,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:53:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:16,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:54:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:28,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21654988] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:54:28,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1008941454] [2023-04-03 02:54:28,587 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2023-04-03 02:54:28,587 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:54:28,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:54:28,593 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:54:28,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:54:29,292 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2023-04-03 02:54:37,705 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2023-04-03 02:54:39,080 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 32768 conjuctions. This might take some time...