/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:35:43,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:35:43,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:35:43,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:35:43,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:35:43,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:35:43,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:35:43,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:35:43,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:35:43,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:35:43,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:35:43,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:35:43,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:35:43,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:35:43,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:35:43,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:35:43,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:35:43,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:35:43,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:35:43,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:35:43,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:35:43,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:35:43,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:35:43,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:35:44,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:35:44,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:35:44,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:35:44,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:35:44,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:35:44,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:35:44,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:35:44,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:35:44,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:35:44,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:35:44,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:35:44,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:35:44,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:35:44,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:35:44,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:35:44,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:35:44,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:35:44,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:35:44,039 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:35:44,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:35:44,040 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:35:44,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:35:44,041 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:35:44,041 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:35:44,041 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:35:44,041 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:35:44,042 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:35:44,042 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:35:44,042 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:35:44,043 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:35:44,043 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:35:44,043 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:35:44,043 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:35:44,043 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:35:44,043 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:35:44,043 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:35:44,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:35:44,044 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:35:44,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:35:44,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:35:44,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:35:44,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:35:44,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:35:44,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:35:44,045 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:35:44,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:35:44,045 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:35:44,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:35:44,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:35:44,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:35:44,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:35:44,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:35:44,046 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:35:44,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:35:44,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:35:44,047 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:35:44,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:35:44,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:35:44,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:35:44,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:35:44,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:35:44,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:35:44,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:35:44,333 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:35:44,334 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:35:44,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:35:45,482 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:35:45,772 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:35:45,773 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:35:45,784 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9d4d85e3/445941d3b4bb4f1aaaea1ff7f7af36e4/FLAG52fe8aab6 [2023-04-01 12:35:45,799 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9d4d85e3/445941d3b4bb4f1aaaea1ff7f7af36e4 [2023-04-01 12:35:45,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:35:45,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:35:45,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:35:45,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:35:45,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:35:45,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:35:45" (1/1) ... [2023-04-01 12:35:45,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13c95d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:45, skipping insertion in model container [2023-04-01 12:35:45,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:35:45" (1/1) ... [2023-04-01 12:35:45,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:35:45,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:35:46,078 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_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12984,12997] [2023-04-01 12:35:46,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:35:46,157 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:35:46,251 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_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12984,12997] [2023-04-01 12:35:46,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:35:46,312 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:35:46,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:46 WrapperNode [2023-04-01 12:35:46,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:35:46,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:35:46,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:35:46,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:35:46,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:46" (1/1) ... [2023-04-01 12:35:46,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:46" (1/1) ... [2023-04-01 12:35:46,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:46" (1/1) ... [2023-04-01 12:35:46,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:46" (1/1) ... [2023-04-01 12:35:46,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:46" (1/1) ... [2023-04-01 12:35:46,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:46" (1/1) ... [2023-04-01 12:35:46,389 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:46" (1/1) ... [2023-04-01 12:35:46,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:46" (1/1) ... [2023-04-01 12:35:46,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:35:46,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:35:46,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:35:46,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:35:46,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:46" (1/1) ... [2023-04-01 12:35:46,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:35:46,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:35:46,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:35:46,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:35:46,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:35:46,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:35:46,504 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:35:46,504 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:35:46,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:35:46,505 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:35:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:35:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:35:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:35:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:35:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:35:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:35:46,506 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:35:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:35:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:35:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:35:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:35:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:35:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:35:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:35:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:35:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:35:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:35:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:35:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:35:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:35:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:35:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:35:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:35:46,697 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:35:46,699 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:35:47,657 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:35:47,924 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:35:47,924 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:35:47,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:35:47 BoogieIcfgContainer [2023-04-01 12:35:47,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:35:47,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:35:47,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:35:47,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:35:47,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:35:45" (1/3) ... [2023-04-01 12:35:47,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10201932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:35:47, skipping insertion in model container [2023-04-01 12:35:47,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:35:46" (2/3) ... [2023-04-01 12:35:47,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10201932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:35:47, skipping insertion in model container [2023-04-01 12:35:47,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:35:47" (3/3) ... [2023-04-01 12:35:47,938 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:35:47,953 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:35:47,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:35:48,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:35:48,024 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;@1fb78fe6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:35:48,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:35:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 268 states, 255 states have (on average 1.6784313725490196) internal successors, (428), 263 states have internal predecessors, (428), 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) [2023-04-01 12:35:48,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 12:35:48,052 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:48,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:48,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:48,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:48,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2091043506, now seen corresponding path program 1 times [2023-04-01 12:35:48,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:48,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81627384] [2023-04-01 12:35:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:48,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:48,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:48,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81627384] [2023-04-01 12:35:48,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81627384] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:48,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:48,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:48,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484184121] [2023-04-01 12:35:48,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:48,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:48,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:48,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:48,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:48,791 INFO L87 Difference]: Start difference. First operand has 268 states, 255 states have (on average 1.6784313725490196) internal successors, (428), 263 states have internal predecessors, (428), 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 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2023-04-01 12:35:48,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:48,994 INFO L93 Difference]: Finished difference Result 451 states and 703 transitions. [2023-04-01 12:35:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 105 [2023-04-01 12:35:48,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:49,013 INFO L225 Difference]: With dead ends: 451 [2023-04-01 12:35:49,013 INFO L226 Difference]: Without dead ends: 329 [2023-04-01 12:35:49,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:49,023 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 152 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:49,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 875 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:35:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-04-01 12:35:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2023-04-01 12:35:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 323 states have (on average 1.498452012383901) internal successors, (484), 323 states have internal predecessors, (484), 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) [2023-04-01 12:35:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 487 transitions. [2023-04-01 12:35:49,114 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 487 transitions. Word has length 105 [2023-04-01 12:35:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:49,116 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 487 transitions. [2023-04-01 12:35:49,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2023-04-01 12:35:49,116 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 487 transitions. [2023-04-01 12:35:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 12:35:49,122 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:49,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:49,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:35:49,123 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:49,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:49,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1495409917, now seen corresponding path program 1 times [2023-04-01 12:35:49,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:49,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109925511] [2023-04-01 12:35:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:49,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:49,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:49,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109925511] [2023-04-01 12:35:49,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109925511] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:49,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:49,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:49,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119934870] [2023-04-01 12:35:49,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:49,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:49,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:49,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:49,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:49,418 INFO L87 Difference]: Start difference. First operand 327 states and 487 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2023-04-01 12:35:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:49,525 INFO L93 Difference]: Finished difference Result 575 states and 872 transitions. [2023-04-01 12:35:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:49,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 107 [2023-04-01 12:35:49,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:49,536 INFO L225 Difference]: With dead ends: 575 [2023-04-01 12:35:49,537 INFO L226 Difference]: Without dead ends: 416 [2023-04-01 12:35:49,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:49,543 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 133 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:49,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 648 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:35:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-04-01 12:35:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2023-04-01 12:35:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 410 states have (on average 1.5048780487804878) internal successors, (617), 410 states have internal predecessors, (617), 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) [2023-04-01 12:35:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 620 transitions. [2023-04-01 12:35:49,611 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 620 transitions. Word has length 107 [2023-04-01 12:35:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:49,614 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 620 transitions. [2023-04-01 12:35:49,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2023-04-01 12:35:49,614 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 620 transitions. [2023-04-01 12:35:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 12:35:49,619 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:49,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:49,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:35:49,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:49,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:49,620 INFO L85 PathProgramCache]: Analyzing trace with hash -59241581, now seen corresponding path program 1 times [2023-04-01 12:35:49,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:49,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105353238] [2023-04-01 12:35:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:49,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:49,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:49,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105353238] [2023-04-01 12:35:49,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105353238] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:49,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:49,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:49,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885667102] [2023-04-01 12:35:49,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:49,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:49,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:49,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:49,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:49,827 INFO L87 Difference]: Start difference. First operand 414 states and 620 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2023-04-01 12:35:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:49,943 INFO L93 Difference]: Finished difference Result 853 states and 1297 transitions. [2023-04-01 12:35:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:49,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 110 [2023-04-01 12:35:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:49,948 INFO L225 Difference]: With dead ends: 853 [2023-04-01 12:35:49,948 INFO L226 Difference]: Without dead ends: 608 [2023-04-01 12:35:49,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:49,955 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 132 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:49,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 736 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:35:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2023-04-01 12:35:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 606. [2023-04-01 12:35:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 602 states have (on average 1.5132890365448506) internal successors, (911), 602 states have internal predecessors, (911), 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) [2023-04-01 12:35:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 914 transitions. [2023-04-01 12:35:50,002 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 914 transitions. Word has length 110 [2023-04-01 12:35:50,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:50,004 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 914 transitions. [2023-04-01 12:35:50,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2023-04-01 12:35:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 914 transitions. [2023-04-01 12:35:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 12:35:50,005 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:50,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:50,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:35:50,006 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:50,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:50,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1167282586, now seen corresponding path program 1 times [2023-04-01 12:35:50,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:50,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574442880] [2023-04-01 12:35:50,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:50,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:50,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:50,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574442880] [2023-04-01 12:35:50,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574442880] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:50,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:50,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:50,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665530040] [2023-04-01 12:35:50,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:50,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:50,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:50,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:50,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:50,174 INFO L87 Difference]: Start difference. First operand 606 states and 914 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2023-04-01 12:35:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:50,354 INFO L93 Difference]: Finished difference Result 1306 states and 1993 transitions. [2023-04-01 12:35:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 112 [2023-04-01 12:35:50,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:50,360 INFO L225 Difference]: With dead ends: 1306 [2023-04-01 12:35:50,361 INFO L226 Difference]: Without dead ends: 869 [2023-04-01 12:35:50,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:50,368 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 131 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:50,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 665 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:35:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2023-04-01 12:35:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 867. [2023-04-01 12:35:50,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 863 states have (on average 1.5214368482039398) internal successors, (1313), 863 states have internal predecessors, (1313), 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) [2023-04-01 12:35:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1316 transitions. [2023-04-01 12:35:50,447 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1316 transitions. Word has length 112 [2023-04-01 12:35:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:50,447 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1316 transitions. [2023-04-01 12:35:50,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2023-04-01 12:35:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1316 transitions. [2023-04-01 12:35:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 12:35:50,449 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:50,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:50,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:35:50,449 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:50,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:50,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1525088698, now seen corresponding path program 1 times [2023-04-01 12:35:50,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:50,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066291509] [2023-04-01 12:35:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:50,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:50,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:50,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066291509] [2023-04-01 12:35:50,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066291509] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:50,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:50,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:50,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534563930] [2023-04-01 12:35:50,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:50,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:50,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:50,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:50,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:50,588 INFO L87 Difference]: Start difference. First operand 867 states and 1316 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2023-04-01 12:35:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:50,803 INFO L93 Difference]: Finished difference Result 2074 states and 3169 transitions. [2023-04-01 12:35:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:50,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 115 [2023-04-01 12:35:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:50,811 INFO L225 Difference]: With dead ends: 2074 [2023-04-01 12:35:50,811 INFO L226 Difference]: Without dead ends: 1394 [2023-04-01 12:35:50,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:50,814 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 126 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:50,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 709 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:35:50,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2023-04-01 12:35:50,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1392. [2023-04-01 12:35:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1388 states have (on average 1.5187319884726225) internal successors, (2108), 1388 states have internal predecessors, (2108), 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) [2023-04-01 12:35:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 2111 transitions. [2023-04-01 12:35:50,976 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 2111 transitions. Word has length 115 [2023-04-01 12:35:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:50,977 INFO L495 AbstractCegarLoop]: Abstraction has 1392 states and 2111 transitions. [2023-04-01 12:35:50,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2023-04-01 12:35:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 2111 transitions. [2023-04-01 12:35:50,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-01 12:35:50,978 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:50,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:50,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:35:50,979 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:50,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash 319406150, now seen corresponding path program 1 times [2023-04-01 12:35:50,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:50,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133275268] [2023-04-01 12:35:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:50,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:51,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:51,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133275268] [2023-04-01 12:35:51,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133275268] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:51,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:51,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:51,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453969547] [2023-04-01 12:35:51,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:51,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:51,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:51,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:51,163 INFO L87 Difference]: Start difference. First operand 1392 states and 2111 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2023-04-01 12:35:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:51,469 INFO L93 Difference]: Finished difference Result 3295 states and 5029 transitions. [2023-04-01 12:35:51,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:51,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 117 [2023-04-01 12:35:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:51,479 INFO L225 Difference]: With dead ends: 3295 [2023-04-01 12:35:51,479 INFO L226 Difference]: Without dead ends: 2090 [2023-04-01 12:35:51,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:51,482 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 125 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:51,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 667 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:35:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2023-04-01 12:35:51,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2023-04-01 12:35:51,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2084 states have (on average 1.522552783109405) internal successors, (3173), 2084 states have internal predecessors, (3173), 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) [2023-04-01 12:35:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3176 transitions. [2023-04-01 12:35:51,687 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3176 transitions. Word has length 117 [2023-04-01 12:35:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:51,688 INFO L495 AbstractCegarLoop]: Abstraction has 2088 states and 3176 transitions. [2023-04-01 12:35:51,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2023-04-01 12:35:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3176 transitions. [2023-04-01 12:35:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-01 12:35:51,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:51,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:51,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:35:51,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:51,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:51,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1686705394, now seen corresponding path program 1 times [2023-04-01 12:35:51,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:51,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861146174] [2023-04-01 12:35:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:51,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:51,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:51,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861146174] [2023-04-01 12:35:51,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861146174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:51,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:51,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:51,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204503429] [2023-04-01 12:35:51,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:51,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:51,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:51,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:51,838 INFO L87 Difference]: Start difference. First operand 2088 states and 3176 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-04-01 12:35:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:52,347 INFO L93 Difference]: Finished difference Result 5395 states and 8209 transitions. [2023-04-01 12:35:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:52,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 120 [2023-04-01 12:35:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:52,384 INFO L225 Difference]: With dead ends: 5395 [2023-04-01 12:35:52,385 INFO L226 Difference]: Without dead ends: 3512 [2023-04-01 12:35:52,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:52,393 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 120 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:52,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 682 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:35:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3512 states. [2023-04-01 12:35:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3512 to 3510. [2023-04-01 12:35:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3510 states, 3506 states have (on average 1.5108385624643468) internal successors, (5297), 3506 states have internal predecessors, (5297), 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) [2023-04-01 12:35:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3510 states to 3510 states and 5300 transitions. [2023-04-01 12:35:52,802 INFO L78 Accepts]: Start accepts. Automaton has 3510 states and 5300 transitions. Word has length 120 [2023-04-01 12:35:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:52,803 INFO L495 AbstractCegarLoop]: Abstraction has 3510 states and 5300 transitions. [2023-04-01 12:35:52,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-04-01 12:35:52,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3510 states and 5300 transitions. [2023-04-01 12:35:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-01 12:35:52,804 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:52,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:52,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:35:52,805 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:52,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:52,805 INFO L85 PathProgramCache]: Analyzing trace with hash 285175129, now seen corresponding path program 1 times [2023-04-01 12:35:52,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:52,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352799896] [2023-04-01 12:35:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:52,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:52,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:52,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352799896] [2023-04-01 12:35:52,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352799896] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:52,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:52,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:52,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392383777] [2023-04-01 12:35:52,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:52,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:52,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:52,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:52,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:52,980 INFO L87 Difference]: Start difference. First operand 3510 states and 5300 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-04-01 12:35:53,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:53,561 INFO L93 Difference]: Finished difference Result 8716 states and 13213 transitions. [2023-04-01 12:35:53,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:35:53,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 122 [2023-04-01 12:35:53,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:53,587 INFO L225 Difference]: With dead ends: 8716 [2023-04-01 12:35:53,587 INFO L226 Difference]: Without dead ends: 5411 [2023-04-01 12:35:53,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:53,597 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 119 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:53,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 669 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:35:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2023-04-01 12:35:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 5409. [2023-04-01 12:35:54,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5409 states, 5405 states have (on average 1.5128584643848288) internal successors, (8177), 5405 states have internal predecessors, (8177), 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) [2023-04-01 12:35:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5409 states to 5409 states and 8180 transitions. [2023-04-01 12:35:54,221 INFO L78 Accepts]: Start accepts. Automaton has 5409 states and 8180 transitions. Word has length 122 [2023-04-01 12:35:54,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:54,222 INFO L495 AbstractCegarLoop]: Abstraction has 5409 states and 8180 transitions. [2023-04-01 12:35:54,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-04-01 12:35:54,222 INFO L276 IsEmpty]: Start isEmpty. Operand 5409 states and 8180 transitions. [2023-04-01 12:35:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 12:35:54,224 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:54,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:54,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:35:54,224 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:54,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:54,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1059820149, now seen corresponding path program 1 times [2023-04-01 12:35:54,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:54,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372019916] [2023-04-01 12:35:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:54,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:54,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:54,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372019916] [2023-04-01 12:35:54,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372019916] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:54,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:54,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:35:54,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831760130] [2023-04-01 12:35:54,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:54,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:35:54,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:54,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:35:54,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:35:54,447 INFO L87 Difference]: Start difference. First operand 5409 states and 8180 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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) [2023-04-01 12:35:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:55,608 INFO L93 Difference]: Finished difference Result 13492 states and 20479 transitions. [2023-04-01 12:35:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:35:55,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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 125 [2023-04-01 12:35:55,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:55,645 INFO L225 Difference]: With dead ends: 13492 [2023-04-01 12:35:55,645 INFO L226 Difference]: Without dead ends: 8252 [2023-04-01 12:35:55,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:35:55,658 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 1005 mSDsluCounter, 2741 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 3102 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:55,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1005 Valid, 3102 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:35:55,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8252 states. [2023-04-01 12:35:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8252 to 8195. [2023-04-01 12:35:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8195 states, 8191 states have (on average 1.519228421438164) internal successors, (12444), 8191 states have internal predecessors, (12444), 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) [2023-04-01 12:35:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8195 states to 8195 states and 12447 transitions. [2023-04-01 12:35:56,464 INFO L78 Accepts]: Start accepts. Automaton has 8195 states and 12447 transitions. Word has length 125 [2023-04-01 12:35:56,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:56,464 INFO L495 AbstractCegarLoop]: Abstraction has 8195 states and 12447 transitions. [2023-04-01 12:35:56,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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) [2023-04-01 12:35:56,465 INFO L276 IsEmpty]: Start isEmpty. Operand 8195 states and 12447 transitions. [2023-04-01 12:35:56,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-01 12:35:56,466 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:56,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:56,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:35:56,467 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:56,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:56,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1571482025, now seen corresponding path program 1 times [2023-04-01 12:35:56,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:56,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138845668] [2023-04-01 12:35:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:56,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:56,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:56,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138845668] [2023-04-01 12:35:56,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138845668] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:56,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:56,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:35:56,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566241640] [2023-04-01 12:35:56,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:56,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:35:56,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:56,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:35:56,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:35:56,681 INFO L87 Difference]: Start difference. First operand 8195 states and 12447 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2023-04-01 12:35:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:35:57,660 INFO L93 Difference]: Finished difference Result 16169 states and 24573 transitions. [2023-04-01 12:35:57,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:35:57,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 126 [2023-04-01 12:35:57,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:35:57,692 INFO L225 Difference]: With dead ends: 16169 [2023-04-01 12:35:57,692 INFO L226 Difference]: Without dead ends: 8197 [2023-04-01 12:35:57,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:35:57,706 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 245 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:35:57,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1004 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:35:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8197 states. [2023-04-01 12:35:58,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8197 to 8188. [2023-04-01 12:35:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8188 states, 8184 states have (on average 1.5155180840664713) internal successors, (12403), 8184 states have internal predecessors, (12403), 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) [2023-04-01 12:35:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8188 states to 8188 states and 12406 transitions. [2023-04-01 12:35:58,459 INFO L78 Accepts]: Start accepts. Automaton has 8188 states and 12406 transitions. Word has length 126 [2023-04-01 12:35:58,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:58,460 INFO L495 AbstractCegarLoop]: Abstraction has 8188 states and 12406 transitions. [2023-04-01 12:35:58,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2023-04-01 12:35:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 8188 states and 12406 transitions. [2023-04-01 12:35:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-01 12:35:58,462 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:58,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:58,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:35:58,462 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:58,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:58,463 INFO L85 PathProgramCache]: Analyzing trace with hash 794943632, now seen corresponding path program 1 times [2023-04-01 12:35:58,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:58,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082864671] [2023-04-01 12:35:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:58,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:35:58,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:58,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082864671] [2023-04-01 12:35:58,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082864671] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:58,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:58,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:35:58,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56258941] [2023-04-01 12:35:58,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:58,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:35:58,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:58,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:35:58,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:35:58,920 INFO L87 Difference]: Start difference. First operand 8188 states and 12406 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) [2023-04-01 12:36:00,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:00,389 INFO L93 Difference]: Finished difference Result 13214 states and 19800 transitions. [2023-04-01 12:36:00,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:36:00,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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 135 [2023-04-01 12:36:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:00,427 INFO L225 Difference]: With dead ends: 13214 [2023-04-01 12:36:00,428 INFO L226 Difference]: Without dead ends: 13212 [2023-04-01 12:36:00,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:36:00,434 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 253 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:00,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1638 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:36:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13212 states. [2023-04-01 12:36:01,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13212 to 8312. [2023-04-01 12:36:01,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8312 states, 8308 states have (on average 1.4990370727010112) internal successors, (12454), 8308 states have internal predecessors, (12454), 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) [2023-04-01 12:36:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8312 states to 8312 states and 12457 transitions. [2023-04-01 12:36:01,401 INFO L78 Accepts]: Start accepts. Automaton has 8312 states and 12457 transitions. Word has length 135 [2023-04-01 12:36:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:01,402 INFO L495 AbstractCegarLoop]: Abstraction has 8312 states and 12457 transitions. [2023-04-01 12:36:01,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) [2023-04-01 12:36:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 8312 states and 12457 transitions. [2023-04-01 12:36:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-01 12:36:01,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:01,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:36:01,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:36:01,404 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:01,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:01,405 INFO L85 PathProgramCache]: Analyzing trace with hash 337815343, now seen corresponding path program 1 times [2023-04-01 12:36:01,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:01,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386939626] [2023-04-01 12:36:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:01,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:36:03,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:36:03,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386939626] [2023-04-01 12:36:03,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386939626] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:36:03,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551390482] [2023-04-01 12:36:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:03,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:36:03,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:36:03,060 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:36:03,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:36:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:03,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 12:36:03,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:36:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 12:36:03,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:36:03,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551390482] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:36:03,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:36:03,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-01 12:36:03,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840813068] [2023-04-01 12:36:03,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:36:03,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:36:03,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:36:03,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:36:03,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:36:03,557 INFO L87 Difference]: Start difference. First operand 8312 states and 12457 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2023-04-01 12:36:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:05,269 INFO L93 Difference]: Finished difference Result 24535 states and 36769 transitions. [2023-04-01 12:36:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:36:05,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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 143 [2023-04-01 12:36:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:05,311 INFO L225 Difference]: With dead ends: 24535 [2023-04-01 12:36:05,312 INFO L226 Difference]: Without dead ends: 16246 [2023-04-01 12:36:05,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:36:05,334 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 854 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:05,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 772 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:36:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16246 states. [2023-04-01 12:36:06,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16246 to 16244. [2023-04-01 12:36:06,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16244 states, 16240 states have (on average 1.4932266009852218) internal successors, (24250), 16240 states have internal predecessors, (24250), 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) [2023-04-01 12:36:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16244 states to 16244 states and 24253 transitions. [2023-04-01 12:36:06,912 INFO L78 Accepts]: Start accepts. Automaton has 16244 states and 24253 transitions. Word has length 143 [2023-04-01 12:36:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:06,913 INFO L495 AbstractCegarLoop]: Abstraction has 16244 states and 24253 transitions. [2023-04-01 12:36:06,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2023-04-01 12:36:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 16244 states and 24253 transitions. [2023-04-01 12:36:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 12:36:06,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:06,915 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:36:06,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 12:36:07,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 12:36:07,126 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:07,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash 620245175, now seen corresponding path program 1 times [2023-04-01 12:36:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:07,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801410584] [2023-04-01 12:36:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:07,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 12:36:07,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:36:07,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801410584] [2023-04-01 12:36:07,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801410584] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:36:07,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:36:07,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:36:07,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669962560] [2023-04-01 12:36:07,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:36:07,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:36:07,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:36:07,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:36:07,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:36:07,267 INFO L87 Difference]: Start difference. First operand 16244 states and 24253 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2023-04-01 12:36:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:10,430 INFO L93 Difference]: Finished difference Result 47674 states and 71163 transitions. [2023-04-01 12:36:10,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:36:10,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 145 [2023-04-01 12:36:10,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:10,529 INFO L225 Difference]: With dead ends: 47674 [2023-04-01 12:36:10,530 INFO L226 Difference]: Without dead ends: 31549 [2023-04-01 12:36:10,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:36:10,570 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 241 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:10,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 977 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:36:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31549 states. [2023-04-01 12:36:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31549 to 31547. [2023-04-01 12:36:14,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31547 states, 31543 states have (on average 1.4859081254160986) internal successors, (46870), 31543 states have internal predecessors, (46870), 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) [2023-04-01 12:36:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31547 states to 31547 states and 46873 transitions. [2023-04-01 12:36:14,259 INFO L78 Accepts]: Start accepts. Automaton has 31547 states and 46873 transitions. Word has length 145 [2023-04-01 12:36:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:14,259 INFO L495 AbstractCegarLoop]: Abstraction has 31547 states and 46873 transitions. [2023-04-01 12:36:14,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2023-04-01 12:36:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 31547 states and 46873 transitions. [2023-04-01 12:36:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 12:36:14,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:14,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:36:14,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:36:14,270 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:14,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:14,270 INFO L85 PathProgramCache]: Analyzing trace with hash 719656559, now seen corresponding path program 1 times [2023-04-01 12:36:14,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:14,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875344987] [2023-04-01 12:36:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:14,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 12:36:14,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:36:14,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875344987] [2023-04-01 12:36:14,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875344987] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:36:14,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:36:14,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:36:14,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371228770] [2023-04-01 12:36:14,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:36:14,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:36:14,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:36:14,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:36:14,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:36:14,382 INFO L87 Difference]: Start difference. First operand 31547 states and 46873 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2023-04-01 12:36:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:21,014 INFO L93 Difference]: Finished difference Result 94523 states and 140437 transitions. [2023-04-01 12:36:21,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:36:21,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 145 [2023-04-01 12:36:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:21,200 INFO L225 Difference]: With dead ends: 94523 [2023-04-01 12:36:21,201 INFO L226 Difference]: Without dead ends: 63023 [2023-04-01 12:36:21,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:36:21,276 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 338 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:21,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 685 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:36:21,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63023 states. [2023-04-01 12:36:25,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63023 to 31559. [2023-04-01 12:36:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31559 states, 31555 states have (on average 1.4857867215972111) internal successors, (46884), 31555 states have internal predecessors, (46884), 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) [2023-04-01 12:36:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31559 states to 31559 states and 46887 transitions. [2023-04-01 12:36:25,742 INFO L78 Accepts]: Start accepts. Automaton has 31559 states and 46887 transitions. Word has length 145 [2023-04-01 12:36:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:25,743 INFO L495 AbstractCegarLoop]: Abstraction has 31559 states and 46887 transitions. [2023-04-01 12:36:25,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2023-04-01 12:36:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 31559 states and 46887 transitions. [2023-04-01 12:36:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-01 12:36:25,747 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:25,747 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:36:25,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:36:25,747 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:25,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:25,747 INFO L85 PathProgramCache]: Analyzing trace with hash -913479225, now seen corresponding path program 1 times [2023-04-01 12:36:25,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:25,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380697162] [2023-04-01 12:36:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:25,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:36:27,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:36:27,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380697162] [2023-04-01 12:36:27,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380697162] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:36:27,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583759372] [2023-04-01 12:36:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:27,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:36:27,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:36:27,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:36:27,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 12:36:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:36:27,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 1331 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 12:36:27,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:36:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 12:36:27,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:36:27,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583759372] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:36:27,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:36:27,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-01 12:36:27,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723026545] [2023-04-01 12:36:27,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:36:27,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:36:27,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:36:27,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:36:27,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:36:27,657 INFO L87 Difference]: Start difference. First operand 31559 states and 46887 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2023-04-01 12:36:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:36:32,317 INFO L93 Difference]: Finished difference Result 63430 states and 94214 transitions. [2023-04-01 12:36:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:36:32,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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 146 [2023-04-01 12:36:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:36:32,390 INFO L225 Difference]: With dead ends: 63430 [2023-04-01 12:36:32,390 INFO L226 Difference]: Without dead ends: 31882 [2023-04-01 12:36:32,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:36:32,435 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 958 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:36:32,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 691 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:36:32,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31882 states. [2023-04-01 12:36:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31882 to 31624. [2023-04-01 12:36:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31624 states, 31620 states have (on average 1.4858001265022138) internal successors, (46981), 31620 states have internal predecessors, (46981), 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) [2023-04-01 12:36:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31624 states to 31624 states and 46984 transitions. [2023-04-01 12:36:36,785 INFO L78 Accepts]: Start accepts. Automaton has 31624 states and 46984 transitions. Word has length 146 [2023-04-01 12:36:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:36:36,786 INFO L495 AbstractCegarLoop]: Abstraction has 31624 states and 46984 transitions. [2023-04-01 12:36:36,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2023-04-01 12:36:36,786 INFO L276 IsEmpty]: Start isEmpty. Operand 31624 states and 46984 transitions. [2023-04-01 12:36:36,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-01 12:36:36,789 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:36:36,789 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:36:36,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 12:36:36,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 12:36:36,997 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:36:36,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:36:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1345779875, now seen corresponding path program 1 times [2023-04-01 12:36:36,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:36:36,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514900594] [2023-04-01 12:36:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:36:36,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:36:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat