/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:52:38,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:52:38,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:52:38,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:52:38,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:52:38,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:52:38,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:52:38,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:52:38,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:52:38,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:52:38,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:52:38,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:52:38,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:52:38,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:52:38,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:52:38,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:52:38,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:52:38,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:52:38,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:52:38,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:52:38,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:52:38,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:52:38,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:52:38,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:52:38,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:52:38,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:52:38,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:52:38,314 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:52:38,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:52:38,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:52:38,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:52:38,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:52:38,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:52:38,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:52:38,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:52:38,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:52:38,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:52:38,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:52:38,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:52:38,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:52:38,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:52:38,325 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:52:38,360 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:52:38,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:52:38,361 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:52:38,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:52:38,362 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:52:38,362 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:52:38,362 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:52:38,363 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:52:38,363 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:52:38,363 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:52:38,364 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:52:38,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:52:38,364 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:52:38,364 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:52:38,365 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:52:38,365 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:52:38,365 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:52:38,365 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:52:38,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:52:38,365 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:52:38,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:52:38,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:52:38,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:52:38,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:52:38,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:52:38,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:52:38,366 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:52:38,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:52:38,367 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:52:38,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:52:38,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:52:38,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:52:38,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:52:38,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:52:38,368 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:52:38,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:52:38,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:52:38,368 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:52:38,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:52:38,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:52:38,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:52:38,368 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:52:38,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:52:38,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:52:38,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:52:38,629 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:52:38,629 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:52:38,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-04-03 02:52:39,793 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:52:40,056 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:52:40,057 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-04-03 02:52:40,067 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3947fef28/4653792ce30740abbf2e3dfb804a943f/FLAG78d623348 [2023-04-03 02:52:40,080 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3947fef28/4653792ce30740abbf2e3dfb804a943f [2023-04-03 02:52:40,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:52:40,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:52:40,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:52:40,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:52:40,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:52:40,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:52:40" (1/1) ... [2023-04-03 02:52:40,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@393f50a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:40, skipping insertion in model container [2023-04-03 02:52:40,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:52:40" (1/1) ... [2023-04-03 02:52:40,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:52:40,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:52:40,337 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10021,10034] [2023-04-03 02:52:40,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:52:40,419 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:52:40,483 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10021,10034] [2023-04-03 02:52:40,522 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:52:40,544 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:52:40,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:40 WrapperNode [2023-04-03 02:52:40,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:52:40,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:52:40,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:52:40,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:52:40,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:40" (1/1) ... [2023-04-03 02:52:40,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:40" (1/1) ... [2023-04-03 02:52:40,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:40" (1/1) ... [2023-04-03 02:52:40,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:40" (1/1) ... [2023-04-03 02:52:40,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:40" (1/1) ... [2023-04-03 02:52:40,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:40" (1/1) ... [2023-04-03 02:52:40,633 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:40" (1/1) ... [2023-04-03 02:52:40,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:40" (1/1) ... [2023-04-03 02:52:40,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:52:40,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:52:40,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:52:40,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:52:40,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:40" (1/1) ... [2023-04-03 02:52:40,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:52:40,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:52:40,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:52:40,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:52:40,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:52:40,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:52:40,729 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:52:40,729 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:52:40,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:52:40,729 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:52:40,729 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:52:40,730 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:52:40,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:52:40,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:52:40,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:52:40,731 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:52:40,731 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:52:40,731 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:52:40,731 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:52:40,731 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:52:40,732 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:52:40,732 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:52:40,732 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:52:40,732 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:52:40,732 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-03 02:52:40,732 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:52:40,732 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:52:40,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:52:40,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:52:40,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:52:40,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:52:40,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:52:40,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:52:40,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:52:40,911 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:52:40,920 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:52:41,658 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:52:41,865 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:52:41,865 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:52:41,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:52:41 BoogieIcfgContainer [2023-04-03 02:52:41,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:52:41,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:52:41,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:52:41,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:52:41,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:52:40" (1/3) ... [2023-04-03 02:52:41,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b41737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:52:41, skipping insertion in model container [2023-04-03 02:52:41,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:52:40" (2/3) ... [2023-04-03 02:52:41,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b41737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:52:41, skipping insertion in model container [2023-04-03 02:52:41,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:52:41" (3/3) ... [2023-04-03 02:52:41,876 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-04-03 02:52:41,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:52:41,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:52:41,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:52:41,954 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;@5f698965, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:52:41,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:52:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 189 states have (on average 1.7037037037037037) internal successors, (322), 190 states have internal predecessors, (322), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:52:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 02:52:41,972 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:41,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:52:41,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:41,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:41,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1573966353, now seen corresponding path program 1 times [2023-04-03 02:52:42,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:42,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190388293] [2023-04-03 02:52:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:42,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:42,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:42,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190388293] [2023-04-03 02:52:42,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190388293] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:42,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:42,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:52:42,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085148450] [2023-04-03 02:52:42,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:42,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:52:42,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:42,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:52:42,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:52:42,922 INFO L87 Difference]: Start difference. First operand has 195 states, 189 states have (on average 1.7037037037037037) internal successors, (322), 190 states have internal predecessors, (322), 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 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:43,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:43,513 INFO L93 Difference]: Finished difference Result 771 states and 1225 transitions. [2023-04-03 02:52:43,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:52:43,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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 85 [2023-04-03 02:52:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:43,536 INFO L225 Difference]: With dead ends: 771 [2023-04-03 02:52:43,537 INFO L226 Difference]: Without dead ends: 647 [2023-04-03 02:52:43,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:52:43,547 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 1438 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:43,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1438 Valid, 1394 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:52:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-04-03 02:52:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 637. [2023-04-03 02:52:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 633 states have (on average 1.4075829383886256) internal successors, (891), 633 states have internal predecessors, (891), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 894 transitions. [2023-04-03 02:52:43,722 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 894 transitions. Word has length 85 [2023-04-03 02:52:43,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:43,724 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 894 transitions. [2023-04-03 02:52:43,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:43,724 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 894 transitions. [2023-04-03 02:52:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:52:43,734 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:43,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:52:43,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:52:43,735 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:43,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:43,737 INFO L85 PathProgramCache]: Analyzing trace with hash -588491669, now seen corresponding path program 1 times [2023-04-03 02:52:43,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:43,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271612658] [2023-04-03 02:52:43,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:43,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:43,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:43,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271612658] [2023-04-03 02:52:43,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271612658] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:43,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:43,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:52:43,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910752200] [2023-04-03 02:52:43,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:43,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:52:43,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:43,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:52:43,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:52:43,964 INFO L87 Difference]: Start difference. First operand 637 states and 894 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:44,392 INFO L93 Difference]: Finished difference Result 1580 states and 2278 transitions. [2023-04-03 02:52:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:52:44,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-03 02:52:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:44,403 INFO L225 Difference]: With dead ends: 1580 [2023-04-03 02:52:44,403 INFO L226 Difference]: Without dead ends: 1010 [2023-04-03 02:52:44,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:52:44,413 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 667 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:44,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 269 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:52:44,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2023-04-03 02:52:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 1008. [2023-04-03 02:52:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1004 states have (on average 1.4372509960159363) internal successors, (1443), 1004 states have internal predecessors, (1443), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1446 transitions. [2023-04-03 02:52:44,579 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1446 transitions. Word has length 86 [2023-04-03 02:52:44,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:44,581 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1446 transitions. [2023-04-03 02:52:44,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1446 transitions. [2023-04-03 02:52:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:52:44,585 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:44,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:52:44,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:52:44,586 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:44,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:44,586 INFO L85 PathProgramCache]: Analyzing trace with hash -768823633, now seen corresponding path program 1 times [2023-04-03 02:52:44,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:44,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142047537] [2023-04-03 02:52:44,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:44,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:44,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:44,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142047537] [2023-04-03 02:52:44,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142047537] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:44,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:44,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:52:44,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155644381] [2023-04-03 02:52:44,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:44,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:52:44,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:44,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:52:44,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:52:44,807 INFO L87 Difference]: Start difference. First operand 1008 states and 1446 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:45,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:45,305 INFO L93 Difference]: Finished difference Result 2562 states and 3754 transitions. [2023-04-03 02:52:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:52:45,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-03 02:52:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:45,312 INFO L225 Difference]: With dead ends: 2562 [2023-04-03 02:52:45,312 INFO L226 Difference]: Without dead ends: 1752 [2023-04-03 02:52:45,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:52:45,315 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 652 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:45,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 294 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:52:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2023-04-03 02:52:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1750. [2023-04-03 02:52:45,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1746 states have (on average 1.4576174112256586) internal successors, (2545), 1746 states have internal predecessors, (2545), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2548 transitions. [2023-04-03 02:52:45,627 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2548 transitions. Word has length 86 [2023-04-03 02:52:45,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:45,628 INFO L495 AbstractCegarLoop]: Abstraction has 1750 states and 2548 transitions. [2023-04-03 02:52:45,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:45,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2548 transitions. [2023-04-03 02:52:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:52:45,629 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:45,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:52:45,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:52:45,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:45,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:45,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1619924510, now seen corresponding path program 1 times [2023-04-03 02:52:45,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:45,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732372641] [2023-04-03 02:52:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:45,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:45,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:45,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732372641] [2023-04-03 02:52:45,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732372641] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:45,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:45,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:52:45,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812607835] [2023-04-03 02:52:45,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:45,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:52:45,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:45,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:52:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:52:45,766 INFO L87 Difference]: Start difference. First operand 1750 states and 2548 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:46,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:46,563 INFO L93 Difference]: Finished difference Result 4829 states and 7123 transitions. [2023-04-03 02:52:46,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:52:46,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-03 02:52:46,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:46,576 INFO L225 Difference]: With dead ends: 4829 [2023-04-03 02:52:46,576 INFO L226 Difference]: Without dead ends: 3236 [2023-04-03 02:52:46,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:52:46,580 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 622 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:46,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 293 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:52:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2023-04-03 02:52:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3234. [2023-04-03 02:52:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3230 states have (on average 1.4671826625386997) internal successors, (4739), 3230 states have internal predecessors, (4739), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:47,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 4742 transitions. [2023-04-03 02:52:47,062 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 4742 transitions. Word has length 86 [2023-04-03 02:52:47,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:47,062 INFO L495 AbstractCegarLoop]: Abstraction has 3234 states and 4742 transitions. [2023-04-03 02:52:47,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:47,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 4742 transitions. [2023-04-03 02:52:47,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:52:47,068 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:47,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:52:47,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:52:47,068 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:47,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:47,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1547458163, now seen corresponding path program 1 times [2023-04-03 02:52:47,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:47,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499062896] [2023-04-03 02:52:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:47,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:47,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:47,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499062896] [2023-04-03 02:52:47,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499062896] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:47,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:47,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:52:47,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709733195] [2023-04-03 02:52:47,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:47,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:52:47,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:52:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:52:47,251 INFO L87 Difference]: Start difference. First operand 3234 states and 4742 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:48,314 INFO L93 Difference]: Finished difference Result 9318 states and 13764 transitions. [2023-04-03 02:52:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:52:48,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-03 02:52:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:48,340 INFO L225 Difference]: With dead ends: 9318 [2023-04-03 02:52:48,340 INFO L226 Difference]: Without dead ends: 6204 [2023-04-03 02:52:48,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:52:48,348 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 627 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:48,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 285 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:52:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6204 states. [2023-04-03 02:52:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6204 to 6202. [2023-04-03 02:52:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6202 states, 6198 states have (on average 1.467892868667312) internal successors, (9098), 6198 states have internal predecessors, (9098), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6202 states to 6202 states and 9101 transitions. [2023-04-03 02:52:49,168 INFO L78 Accepts]: Start accepts. Automaton has 6202 states and 9101 transitions. Word has length 86 [2023-04-03 02:52:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:49,169 INFO L495 AbstractCegarLoop]: Abstraction has 6202 states and 9101 transitions. [2023-04-03 02:52:49,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 6202 states and 9101 transitions. [2023-04-03 02:52:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:52:49,170 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:49,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:52:49,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:52:49,171 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:49,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1330796292, now seen corresponding path program 1 times [2023-04-03 02:52:49,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:49,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458935327] [2023-04-03 02:52:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:49,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:49,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:49,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458935327] [2023-04-03 02:52:49,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458935327] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:49,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:49,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:52:49,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172633917] [2023-04-03 02:52:49,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:49,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:52:49,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:49,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:52:49,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:52:49,312 INFO L87 Difference]: Start difference. First operand 6202 states and 9101 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:51,128 INFO L93 Difference]: Finished difference Result 18252 states and 26889 transitions. [2023-04-03 02:52:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:52:51,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-03 02:52:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:51,180 INFO L225 Difference]: With dead ends: 18252 [2023-04-03 02:52:51,181 INFO L226 Difference]: Without dead ends: 12140 [2023-04-03 02:52:51,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:52:51,196 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 632 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:51,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 277 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:52:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12140 states. [2023-04-03 02:52:52,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12140 to 12138. [2023-04-03 02:52:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12138 states, 12134 states have (on average 1.4621724081094445) internal successors, (17742), 12134 states have internal predecessors, (17742), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12138 states to 12138 states and 17745 transitions. [2023-04-03 02:52:52,867 INFO L78 Accepts]: Start accepts. Automaton has 12138 states and 17745 transitions. Word has length 86 [2023-04-03 02:52:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:52,867 INFO L495 AbstractCegarLoop]: Abstraction has 12138 states and 17745 transitions. [2023-04-03 02:52:52,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:52,868 INFO L276 IsEmpty]: Start isEmpty. Operand 12138 states and 17745 transitions. [2023-04-03 02:52:52,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:52:52,869 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:52,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:52:52,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:52:52,869 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:52,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:52,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1348186620, now seen corresponding path program 1 times [2023-04-03 02:52:52,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:52,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763431070] [2023-04-03 02:52:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:52,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:54,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:54,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763431070] [2023-04-03 02:52:54,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763431070] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:54,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:54,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:52:54,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367504092] [2023-04-03 02:52:54,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:54,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:52:54,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:54,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:52:54,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:52:54,954 INFO L87 Difference]: Start difference. First operand 12138 states and 17745 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:59,781 INFO L93 Difference]: Finished difference Result 29370 states and 42825 transitions. [2023-04-03 02:52:59,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:52:59,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 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 87 [2023-04-03 02:52:59,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:59,858 INFO L225 Difference]: With dead ends: 29370 [2023-04-03 02:52:59,858 INFO L226 Difference]: Without dead ends: 29368 [2023-04-03 02:52:59,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2023-04-03 02:52:59,873 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 1466 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1466 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:59,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1466 Valid, 2067 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:52:59,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29368 states. [2023-04-03 02:53:02,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29368 to 21398. [2023-04-03 02:53:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21398 states, 21394 states have (on average 1.4557819949518556) internal successors, (31145), 21394 states have internal predecessors, (31145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21398 states to 21398 states and 31148 transitions. [2023-04-03 02:53:02,754 INFO L78 Accepts]: Start accepts. Automaton has 21398 states and 31148 transitions. Word has length 87 [2023-04-03 02:53:02,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:02,754 INFO L495 AbstractCegarLoop]: Abstraction has 21398 states and 31148 transitions. [2023-04-03 02:53:02,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 21398 states and 31148 transitions. [2023-04-03 02:53:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:53:02,757 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:02,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:02,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:53:02,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:02,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:02,758 INFO L85 PathProgramCache]: Analyzing trace with hash -893144964, now seen corresponding path program 1 times [2023-04-03 02:53:02,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:02,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659512663] [2023-04-03 02:53:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:02,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:04,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:04,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659512663] [2023-04-03 02:53:04,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659512663] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:04,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:04,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:53:04,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933186882] [2023-04-03 02:53:04,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:04,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:53:04,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:04,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:53:04,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:53:04,643 INFO L87 Difference]: Start difference. First operand 21398 states and 31148 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:09,843 INFO L93 Difference]: Finished difference Result 37074 states and 53804 transitions. [2023-04-03 02:53:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:53:09,843 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 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 87 [2023-04-03 02:53:09,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:09,934 INFO L225 Difference]: With dead ends: 37074 [2023-04-03 02:53:09,934 INFO L226 Difference]: Without dead ends: 37072 [2023-04-03 02:53:09,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2023-04-03 02:53:09,951 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 1384 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1384 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:09,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1384 Valid, 2183 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:53:09,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37072 states. [2023-04-03 02:53:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37072 to 21445. [2023-04-03 02:53:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21445 states, 21441 states have (on average 1.4552959283615503) internal successors, (31203), 21441 states have internal predecessors, (31203), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21445 states to 21445 states and 31206 transitions. [2023-04-03 02:53:12,961 INFO L78 Accepts]: Start accepts. Automaton has 21445 states and 31206 transitions. Word has length 87 [2023-04-03 02:53:12,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:12,961 INFO L495 AbstractCegarLoop]: Abstraction has 21445 states and 31206 transitions. [2023-04-03 02:53:12,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:12,962 INFO L276 IsEmpty]: Start isEmpty. Operand 21445 states and 31206 transitions. [2023-04-03 02:53:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:53:12,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:12,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:12,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:53:12,963 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:12,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:12,964 INFO L85 PathProgramCache]: Analyzing trace with hash 530927836, now seen corresponding path program 1 times [2023-04-03 02:53:12,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:12,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595662093] [2023-04-03 02:53:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:12,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:14,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:14,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595662093] [2023-04-03 02:53:14,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595662093] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:14,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:14,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:53:14,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81074296] [2023-04-03 02:53:14,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:14,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:53:14,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:14,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:53:14,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:53:14,766 INFO L87 Difference]: Start difference. First operand 21445 states and 31206 transitions. Second operand has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:18,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:18,597 INFO L93 Difference]: Finished difference Result 28159 states and 40871 transitions. [2023-04-03 02:53:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:53:18,598 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 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 87 [2023-04-03 02:53:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:18,653 INFO L225 Difference]: With dead ends: 28159 [2023-04-03 02:53:18,653 INFO L226 Difference]: Without dead ends: 25853 [2023-04-03 02:53:18,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:53:18,666 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 1467 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:18,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1467 Valid, 1689 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:53:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25853 states. [2023-04-03 02:53:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25853 to 23577. [2023-04-03 02:53:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23577 states, 23573 states have (on average 1.453272812115556) internal successors, (34258), 23573 states have internal predecessors, (34258), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23577 states to 23577 states and 34261 transitions. [2023-04-03 02:53:21,846 INFO L78 Accepts]: Start accepts. Automaton has 23577 states and 34261 transitions. Word has length 87 [2023-04-03 02:53:21,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:21,847 INFO L495 AbstractCegarLoop]: Abstraction has 23577 states and 34261 transitions. [2023-04-03 02:53:21,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 23577 states and 34261 transitions. [2023-04-03 02:53:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:53:21,848 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:21,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:21,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:53:21,851 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:21,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:21,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1372148124, now seen corresponding path program 1 times [2023-04-03 02:53:21,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:21,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886549524] [2023-04-03 02:53:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:21,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:23,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:23,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886549524] [2023-04-03 02:53:23,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886549524] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:23,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:23,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:53:23,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639641429] [2023-04-03 02:53:23,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:23,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:53:23,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:53:23,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:53:23,352 INFO L87 Difference]: Start difference. First operand 23577 states and 34261 transitions. Second operand has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:29,033 INFO L93 Difference]: Finished difference Result 37444 states and 54385 transitions. [2023-04-03 02:53:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:53:29,034 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 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 87 [2023-04-03 02:53:29,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:29,119 INFO L225 Difference]: With dead ends: 37444 [2023-04-03 02:53:29,119 INFO L226 Difference]: Without dead ends: 37442 [2023-04-03 02:53:29,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2023-04-03 02:53:29,135 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 1548 mSDsluCounter, 3485 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 3898 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:29,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 3898 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 02:53:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37442 states. [2023-04-03 02:53:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37442 to 23604. [2023-04-03 02:53:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23604 states, 23600 states have (on average 1.4530508474576271) internal successors, (34292), 23600 states have internal predecessors, (34292), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23604 states to 23604 states and 34295 transitions. [2023-04-03 02:53:32,406 INFO L78 Accepts]: Start accepts. Automaton has 23604 states and 34295 transitions. Word has length 87 [2023-04-03 02:53:32,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:32,407 INFO L495 AbstractCegarLoop]: Abstraction has 23604 states and 34295 transitions. [2023-04-03 02:53:32,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 23604 states and 34295 transitions. [2023-04-03 02:53:32,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:53:32,409 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:32,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:32,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:53:32,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:32,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:32,410 INFO L85 PathProgramCache]: Analyzing trace with hash -138445899, now seen corresponding path program 1 times [2023-04-03 02:53:32,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:32,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838341064] [2023-04-03 02:53:32,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:32,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:32,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838341064] [2023-04-03 02:53:32,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838341064] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:32,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:32,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:53:32,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138707786] [2023-04-03 02:53:32,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:32,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:53:32,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:32,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:53:32,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:53:32,511 INFO L87 Difference]: Start difference. First operand 23604 states and 34295 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:35,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:35,668 INFO L93 Difference]: Finished difference Result 35659 states and 51947 transitions. [2023-04-03 02:53:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:53:35,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-04-03 02:53:35,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:35,711 INFO L225 Difference]: With dead ends: 35659 [2023-04-03 02:53:35,711 INFO L226 Difference]: Without dead ends: 23604 [2023-04-03 02:53:35,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:53:35,740 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 535 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:35,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 210 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:53:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23604 states. [2023-04-03 02:53:38,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23604 to 23604. [2023-04-03 02:53:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23604 states, 23600 states have (on average 1.4530084745762712) internal successors, (34291), 23600 states have internal predecessors, (34291), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23604 states to 23604 states and 34294 transitions. [2023-04-03 02:53:38,915 INFO L78 Accepts]: Start accepts. Automaton has 23604 states and 34294 transitions. Word has length 87 [2023-04-03 02:53:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:38,915 INFO L495 AbstractCegarLoop]: Abstraction has 23604 states and 34294 transitions. [2023-04-03 02:53:38,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 23604 states and 34294 transitions. [2023-04-03 02:53:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:53:38,917 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:38,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:38,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:53:38,917 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:38,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:38,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1277116959, now seen corresponding path program 1 times [2023-04-03 02:53:38,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:38,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887935898] [2023-04-03 02:53:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:38,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:40,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:40,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887935898] [2023-04-03 02:53:40,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887935898] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:40,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:40,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:53:40,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915597128] [2023-04-03 02:53:40,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:40,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:53:40,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:40,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:53:40,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:53:40,492 INFO L87 Difference]: Start difference. First operand 23604 states and 34294 transitions. Second operand has 20 states, 20 states have (on average 4.25) internal successors, (85), 20 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:48,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:48,254 INFO L93 Difference]: Finished difference Result 45797 states and 66692 transitions. [2023-04-03 02:53:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:53:48,254 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.25) internal successors, (85), 20 states have internal predecessors, (85), 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 88 [2023-04-03 02:53:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:48,324 INFO L225 Difference]: With dead ends: 45797 [2023-04-03 02:53:48,325 INFO L226 Difference]: Without dead ends: 45795 [2023-04-03 02:53:48,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=295, Invalid=827, Unknown=0, NotChecked=0, Total=1122 [2023-04-03 02:53:48,336 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 1325 mSDsluCounter, 2319 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1325 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:48,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1325 Valid, 2737 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:53:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45795 states. [2023-04-03 02:53:52,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45795 to 26304. [2023-04-03 02:53:52,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26304 states, 26300 states have (on average 1.454296577946768) internal successors, (38248), 26300 states have internal predecessors, (38248), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26304 states to 26304 states and 38251 transitions. [2023-04-03 02:53:52,517 INFO L78 Accepts]: Start accepts. Automaton has 26304 states and 38251 transitions. Word has length 88 [2023-04-03 02:53:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:52,517 INFO L495 AbstractCegarLoop]: Abstraction has 26304 states and 38251 transitions. [2023-04-03 02:53:52,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.25) internal successors, (85), 20 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 26304 states and 38251 transitions. [2023-04-03 02:53:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 02:53:52,519 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:52,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:53:52,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:53:52,519 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:52,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:52,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1175863719, now seen corresponding path program 1 times [2023-04-03 02:53:52,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:52,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254953409] [2023-04-03 02:53:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:52,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:54,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:54,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254953409] [2023-04-03 02:53:54,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254953409] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:54,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:54,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-04-03 02:53:54,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953177272] [2023-04-03 02:53:54,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:54,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-03 02:53:54,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:54,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-03 02:53:54,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:53:54,169 INFO L87 Difference]: Start difference. First operand 26304 states and 38251 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:02,782 INFO L93 Difference]: Finished difference Result 52740 states and 76658 transitions. [2023-04-03 02:54:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-03 02:54:02,783 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 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 89 [2023-04-03 02:54:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:02,886 INFO L225 Difference]: With dead ends: 52740 [2023-04-03 02:54:02,886 INFO L226 Difference]: Without dead ends: 52738 [2023-04-03 02:54:02,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2023-04-03 02:54:02,906 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 1354 mSDsluCounter, 2660 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 2960 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:02,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1354 Valid, 2960 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 02:54:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52738 states. [2023-04-03 02:54:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52738 to 26297. [2023-04-03 02:54:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26297 states, 26293 states have (on average 1.4543034267675807) internal successors, (38238), 26293 states have internal predecessors, (38238), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26297 states to 26297 states and 38241 transitions. [2023-04-03 02:54:07,357 INFO L78 Accepts]: Start accepts. Automaton has 26297 states and 38241 transitions. Word has length 89 [2023-04-03 02:54:07,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:07,358 INFO L495 AbstractCegarLoop]: Abstraction has 26297 states and 38241 transitions. [2023-04-03 02:54:07,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 26297 states and 38241 transitions. [2023-04-03 02:54:07,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 02:54:07,360 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:07,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:54:07,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:54:07,360 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:07,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1695030777, now seen corresponding path program 1 times [2023-04-03 02:54:07,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:07,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301798284] [2023-04-03 02:54:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:07,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:09,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301798284] [2023-04-03 02:54:09,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301798284] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:09,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:09,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-03 02:54:09,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912692441] [2023-04-03 02:54:09,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:09,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:54:09,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:09,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:54:09,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:54:09,063 INFO L87 Difference]: Start difference. First operand 26297 states and 38241 transitions. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 23 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:15,210 INFO L93 Difference]: Finished difference Result 33058 states and 47962 transitions. [2023-04-03 02:54:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:54:15,210 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 23 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2023-04-03 02:54:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:15,254 INFO L225 Difference]: With dead ends: 33058 [2023-04-03 02:54:15,254 INFO L226 Difference]: Without dead ends: 30752 [2023-04-03 02:54:15,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=401, Invalid=1405, Unknown=0, NotChecked=0, Total=1806 [2023-04-03 02:54:15,270 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 2046 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2046 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:15,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2046 Valid, 1685 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-03 02:54:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30752 states. [2023-04-03 02:54:19,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30752 to 26295. [2023-04-03 02:54:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26295 states, 26291 states have (on average 1.4542619147236697) internal successors, (38234), 26291 states have internal predecessors, (38234), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26295 states to 26295 states and 38237 transitions. [2023-04-03 02:54:19,365 INFO L78 Accepts]: Start accepts. Automaton has 26295 states and 38237 transitions. Word has length 89 [2023-04-03 02:54:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:19,365 INFO L495 AbstractCegarLoop]: Abstraction has 26295 states and 38237 transitions. [2023-04-03 02:54:19,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 23 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 26295 states and 38237 transitions. [2023-04-03 02:54:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 02:54:19,367 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:19,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:54:19,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:54:19,368 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:19,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash -853810489, now seen corresponding path program 1 times [2023-04-03 02:54:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:19,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249074430] [2023-04-03 02:54:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:19,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:20,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:20,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249074430] [2023-04-03 02:54:20,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249074430] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:20,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:20,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:54:20,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766185556] [2023-04-03 02:54:20,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:20,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:54:20,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:20,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:54:20,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:54:20,908 INFO L87 Difference]: Start difference. First operand 26295 states and 38237 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:29,746 INFO L93 Difference]: Finished difference Result 47626 states and 69130 transitions. [2023-04-03 02:54:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:54:29,747 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 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 89 [2023-04-03 02:54:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:29,832 INFO L225 Difference]: With dead ends: 47626 [2023-04-03 02:54:29,833 INFO L226 Difference]: Without dead ends: 47624 [2023-04-03 02:54:29,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2023-04-03 02:54:29,849 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 1401 mSDsluCounter, 2634 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 3064 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:29,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1401 Valid, 3064 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:54:29,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47624 states. [2023-04-03 02:54:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47624 to 26292. [2023-04-03 02:54:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26292 states, 26288 states have (on average 1.454275715155204) internal successors, (38230), 26288 states have internal predecessors, (38230), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26292 states to 26292 states and 38233 transitions. [2023-04-03 02:54:34,687 INFO L78 Accepts]: Start accepts. Automaton has 26292 states and 38233 transitions. Word has length 89 [2023-04-03 02:54:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:34,687 INFO L495 AbstractCegarLoop]: Abstraction has 26292 states and 38233 transitions. [2023-04-03 02:54:34,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:34,688 INFO L276 IsEmpty]: Start isEmpty. Operand 26292 states and 38233 transitions. [2023-04-03 02:54:34,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 02:54:34,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:34,689 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] [2023-04-03 02:54:34,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:54:34,689 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:34,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:34,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1769187463, now seen corresponding path program 1 times [2023-04-03 02:54:34,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:34,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061986954] [2023-04-03 02:54:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:34,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:36,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:36,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061986954] [2023-04-03 02:54:36,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061986954] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:36,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:36,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-03 02:54:36,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947934463] [2023-04-03 02:54:36,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:36,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-03 02:54:36,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:36,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-03 02:54:36,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:54:36,429 INFO L87 Difference]: Start difference. First operand 26292 states and 38233 transitions. Second operand has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:43,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:43,579 INFO L93 Difference]: Finished difference Result 30650 states and 44456 transitions. [2023-04-03 02:54:43,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-03 02:54:43,580 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2023-04-03 02:54:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:43,624 INFO L225 Difference]: With dead ends: 30650 [2023-04-03 02:54:43,625 INFO L226 Difference]: Without dead ends: 30648 [2023-04-03 02:54:43,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=457, Invalid=1613, Unknown=0, NotChecked=0, Total=2070 [2023-04-03 02:54:43,634 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 1885 mSDsluCounter, 2681 mSDsCounter, 0 mSdLazyCounter, 3624 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1885 SdHoareTripleChecker+Valid, 2981 SdHoareTripleChecker+Invalid, 3662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:43,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1885 Valid, 2981 Invalid, 3662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3624 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-03 02:54:43,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30648 states. [2023-04-03 02:54:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30648 to 27458. [2023-04-03 02:54:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27458 states, 27454 states have (on average 1.4526844904203395) internal successors, (39882), 27454 states have internal predecessors, (39882), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27458 states to 27458 states and 39885 transitions. [2023-04-03 02:54:48,215 INFO L78 Accepts]: Start accepts. Automaton has 27458 states and 39885 transitions. Word has length 89 [2023-04-03 02:54:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:48,215 INFO L495 AbstractCegarLoop]: Abstraction has 27458 states and 39885 transitions. [2023-04-03 02:54:48,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.44) internal successors, (86), 24 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 27458 states and 39885 transitions. [2023-04-03 02:54:48,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 02:54:48,217 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:48,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:54:48,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:54:48,218 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:48,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:48,218 INFO L85 PathProgramCache]: Analyzing trace with hash -64450233, now seen corresponding path program 1 times [2023-04-03 02:54:48,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:48,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395604154] [2023-04-03 02:54:48,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:48,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:49,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:49,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395604154] [2023-04-03 02:54:49,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395604154] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:49,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:49,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:54:49,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176048343] [2023-04-03 02:54:49,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:49,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:54:49,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:49,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:54:49,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:54:49,737 INFO L87 Difference]: Start difference. First operand 27458 states and 39885 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:56,984 INFO L93 Difference]: Finished difference Result 36344 states and 52652 transitions. [2023-04-03 02:54:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-03 02:54:56,984 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 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 89 [2023-04-03 02:54:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:57,032 INFO L225 Difference]: With dead ends: 36344 [2023-04-03 02:54:57,033 INFO L226 Difference]: Without dead ends: 34038 [2023-04-03 02:54:57,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2023-04-03 02:54:57,042 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 1315 mSDsluCounter, 3188 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 3599 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:57,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1315 Valid, 3599 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:54:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34038 states. [2023-04-03 02:55:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34038 to 27467. [2023-04-03 02:55:01,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27467 states, 27463 states have (on average 1.4525725521610895) internal successors, (39892), 27463 states have internal predecessors, (39892), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27467 states to 27467 states and 39895 transitions. [2023-04-03 02:55:02,031 INFO L78 Accepts]: Start accepts. Automaton has 27467 states and 39895 transitions. Word has length 89 [2023-04-03 02:55:02,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:02,031 INFO L495 AbstractCegarLoop]: Abstraction has 27467 states and 39895 transitions. [2023-04-03 02:55:02,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:02,031 INFO L276 IsEmpty]: Start isEmpty. Operand 27467 states and 39895 transitions. [2023-04-03 02:55:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 02:55:02,033 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:02,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:55:02,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:55:02,034 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:02,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:02,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1566934713, now seen corresponding path program 1 times [2023-04-03 02:55:02,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:02,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727991222] [2023-04-03 02:55:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:02,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:03,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:03,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727991222] [2023-04-03 02:55:03,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727991222] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:03,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:03,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-04-03 02:55:03,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725098722] [2023-04-03 02:55:03,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:03,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-03 02:55:03,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:03,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-03 02:55:03,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:55:03,566 INFO L87 Difference]: Start difference. First operand 27467 states and 39895 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:13,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:13,018 INFO L93 Difference]: Finished difference Result 48826 states and 70818 transitions. [2023-04-03 02:55:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:55:13,019 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 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 89 [2023-04-03 02:55:13,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:13,100 INFO L225 Difference]: With dead ends: 48826 [2023-04-03 02:55:13,101 INFO L226 Difference]: Without dead ends: 48824 [2023-04-03 02:55:13,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2023-04-03 02:55:13,119 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 1484 mSDsluCounter, 2670 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 3087 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:13,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1484 Valid, 3087 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:55:13,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48824 states. [2023-04-03 02:55:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48824 to 27495. [2023-04-03 02:55:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27495 states, 27491 states have (on average 1.4524026044887417) internal successors, (39928), 27491 states have internal predecessors, (39928), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:18,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27495 states to 27495 states and 39931 transitions. [2023-04-03 02:55:18,399 INFO L78 Accepts]: Start accepts. Automaton has 27495 states and 39931 transitions. Word has length 89 [2023-04-03 02:55:18,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:18,400 INFO L495 AbstractCegarLoop]: Abstraction has 27495 states and 39931 transitions. [2023-04-03 02:55:18,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:18,400 INFO L276 IsEmpty]: Start isEmpty. Operand 27495 states and 39931 transitions. [2023-04-03 02:55:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 02:55:18,402 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:18,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:55:18,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:55:18,402 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:18,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:18,403 INFO L85 PathProgramCache]: Analyzing trace with hash -142861913, now seen corresponding path program 1 times [2023-04-03 02:55:18,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:18,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374563875] [2023-04-03 02:55:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:18,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:19,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:19,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374563875] [2023-04-03 02:55:19,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374563875] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:19,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:19,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:55:19,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762255672] [2023-04-03 02:55:19,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:19,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:55:19,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:19,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:55:19,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:55:19,742 INFO L87 Difference]: Start difference. First operand 27495 states and 39931 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:29,618 INFO L93 Difference]: Finished difference Result 51670 states and 74883 transitions. [2023-04-03 02:55:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:55:29,619 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 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 89 [2023-04-03 02:55:29,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:29,689 INFO L225 Difference]: With dead ends: 51670 [2023-04-03 02:55:29,689 INFO L226 Difference]: Without dead ends: 47060 [2023-04-03 02:55:29,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2023-04-03 02:55:29,720 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 1216 mSDsluCounter, 2455 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:29,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1216 Valid, 2859 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:55:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47060 states. [2023-04-03 02:55:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47060 to 31551. [2023-04-03 02:55:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31551 states, 31547 states have (on average 1.4501854376010397) internal successors, (45749), 31547 states have internal predecessors, (45749), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31551 states to 31551 states and 45752 transitions. [2023-04-03 02:55:35,929 INFO L78 Accepts]: Start accepts. Automaton has 31551 states and 45752 transitions. Word has length 89 [2023-04-03 02:55:35,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:35,929 INFO L495 AbstractCegarLoop]: Abstraction has 31551 states and 45752 transitions. [2023-04-03 02:55:35,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 31551 states and 45752 transitions. [2023-04-03 02:55:35,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 02:55:35,931 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:35,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:55:35,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:55:35,932 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:35,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:35,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1078327815, now seen corresponding path program 1 times [2023-04-03 02:55:35,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:35,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391701150] [2023-04-03 02:55:35,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:35,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:37,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:37,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391701150] [2023-04-03 02:55:37,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391701150] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:37,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:37,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:55:37,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369057755] [2023-04-03 02:55:37,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:37,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:55:37,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:55:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:55:37,243 INFO L87 Difference]: Start difference. First operand 31551 states and 45752 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:47,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:47,291 INFO L93 Difference]: Finished difference Result 47275 states and 68458 transitions. [2023-04-03 02:55:47,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:55:47,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 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 89 [2023-04-03 02:55:47,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:47,367 INFO L225 Difference]: With dead ends: 47275 [2023-04-03 02:55:47,367 INFO L226 Difference]: Without dead ends: 47273 [2023-04-03 02:55:47,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2023-04-03 02:55:47,382 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 1580 mSDsluCounter, 2349 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1580 SdHoareTripleChecker+Valid, 2772 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:47,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1580 Valid, 2772 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:55:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47273 states. [2023-04-03 02:55:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47273 to 31562. [2023-04-03 02:55:53,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31562 states, 31558 states have (on average 1.4501552696622093) internal successors, (45764), 31558 states have internal predecessors, (45764), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31562 states to 31562 states and 45767 transitions. [2023-04-03 02:55:53,920 INFO L78 Accepts]: Start accepts. Automaton has 31562 states and 45767 transitions. Word has length 89 [2023-04-03 02:55:53,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:53,920 INFO L495 AbstractCegarLoop]: Abstraction has 31562 states and 45767 transitions. [2023-04-03 02:55:53,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:53,920 INFO L276 IsEmpty]: Start isEmpty. Operand 31562 states and 45767 transitions. [2023-04-03 02:55:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 02:55:53,922 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:53,922 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] [2023-04-03 02:55:53,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:55:53,922 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:53,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:53,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1593826938, now seen corresponding path program 1 times [2023-04-03 02:55:53,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:53,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83786978] [2023-04-03 02:55:53,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:53,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:53,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:53,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83786978] [2023-04-03 02:55:53,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83786978] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:53,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:53,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:55:53,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718309039] [2023-04-03 02:55:53,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:53,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:55:53,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:53,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:55:53,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:55:53,979 INFO L87 Difference]: Start difference. First operand 31562 states and 45767 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:00,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:00,150 INFO L93 Difference]: Finished difference Result 55380 states and 80503 transitions. [2023-04-03 02:56:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:56:00,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 90 [2023-04-03 02:56:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:00,204 INFO L225 Difference]: With dead ends: 55380 [2023-04-03 02:56:00,205 INFO L226 Difference]: Without dead ends: 30742 [2023-04-03 02:56:00,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:00,260 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 161 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:00,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 436 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30742 states. [2023-04-03 02:56:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30742 to 30740. [2023-04-03 02:56:06,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30740 states, 30736 states have (on average 1.4486920874544509) internal successors, (44527), 30736 states have internal predecessors, (44527), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30740 states to 30740 states and 44530 transitions. [2023-04-03 02:56:06,343 INFO L78 Accepts]: Start accepts. Automaton has 30740 states and 44530 transitions. Word has length 90 [2023-04-03 02:56:06,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:06,343 INFO L495 AbstractCegarLoop]: Abstraction has 30740 states and 44530 transitions. [2023-04-03 02:56:06,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 30740 states and 44530 transitions. [2023-04-03 02:56:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 02:56:06,345 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:06,345 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] [2023-04-03 02:56:06,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-03 02:56:06,345 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:06,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:06,346 INFO L85 PathProgramCache]: Analyzing trace with hash 139734272, now seen corresponding path program 1 times [2023-04-03 02:56:06,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:06,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422617001] [2023-04-03 02:56:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:06,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:06,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:06,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422617001] [2023-04-03 02:56:06,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422617001] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:06,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:06,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:56:06,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341746716] [2023-04-03 02:56:06,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:06,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:56:06,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:06,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:56:06,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:06,407 INFO L87 Difference]: Start difference. First operand 30740 states and 44530 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:12,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:12,823 INFO L93 Difference]: Finished difference Result 54230 states and 78751 transitions. [2023-04-03 02:56:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:56:12,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 90 [2023-04-03 02:56:12,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:12,883 INFO L225 Difference]: With dead ends: 54230 [2023-04-03 02:56:12,883 INFO L226 Difference]: Without dead ends: 29881 [2023-04-03 02:56:12,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:12,911 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 163 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:12,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 424 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29881 states. [2023-04-03 02:56:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29881 to 29879. [2023-04-03 02:56:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29879 states, 29875 states have (on average 1.4473640167364017) internal successors, (43240), 29875 states have internal predecessors, (43240), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29879 states to 29879 states and 43243 transitions. [2023-04-03 02:56:19,323 INFO L78 Accepts]: Start accepts. Automaton has 29879 states and 43243 transitions. Word has length 90 [2023-04-03 02:56:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:19,324 INFO L495 AbstractCegarLoop]: Abstraction has 29879 states and 43243 transitions. [2023-04-03 02:56:19,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 29879 states and 43243 transitions. [2023-04-03 02:56:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 02:56:19,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:19,325 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] [2023-04-03 02:56:19,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:56:19,325 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:19,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:19,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1419624535, now seen corresponding path program 1 times [2023-04-03 02:56:19,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:19,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260174294] [2023-04-03 02:56:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:19,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:56:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:56:19,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:56:19,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260174294] [2023-04-03 02:56:19,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260174294] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:56:19,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:56:19,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:56:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25297173] [2023-04-03 02:56:19,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:56:19,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:56:19,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:56:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:56:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:19,376 INFO L87 Difference]: Start difference. First operand 29879 states and 43243 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:56:25,615 INFO L93 Difference]: Finished difference Result 56361 states and 81802 transitions. [2023-04-03 02:56:25,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:56:25,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 90 [2023-04-03 02:56:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:56:25,669 INFO L225 Difference]: With dead ends: 56361 [2023-04-03 02:56:25,669 INFO L226 Difference]: Without dead ends: 29169 [2023-04-03 02:56:25,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:56:25,700 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 151 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:56:25,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 422 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:56:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29169 states. [2023-04-03 02:56:31,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29169 to 29053. [2023-04-03 02:56:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29053 states, 29049 states have (on average 1.445867327618851) internal successors, (42001), 29049 states have internal predecessors, (42001), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29053 states to 29053 states and 42004 transitions. [2023-04-03 02:56:31,924 INFO L78 Accepts]: Start accepts. Automaton has 29053 states and 42004 transitions. Word has length 90 [2023-04-03 02:56:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:56:31,925 INFO L495 AbstractCegarLoop]: Abstraction has 29053 states and 42004 transitions. [2023-04-03 02:56:31,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:56:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 29053 states and 42004 transitions. [2023-04-03 02:56:31,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 02:56:31,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:56:31,926 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] [2023-04-03 02:56:31,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-03 02:56:31,926 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:56:31,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:56:31,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1646258636, now seen corresponding path program 1 times [2023-04-03 02:56:31,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:56:31,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871524121] [2023-04-03 02:56:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:56:31,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:56:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat