/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.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:33:48,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:33:48,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:33:48,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:33:48,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:33:48,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:33:48,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:33:48,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:33:48,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:33:48,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:33:48,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:33:48,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:33:48,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:33:48,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:33:48,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:33:48,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:33:48,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:33:48,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:33:48,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:33:48,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:33:48,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:33:48,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:33:48,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:33:48,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:33:48,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:33:48,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:33:48,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:33:48,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:33:48,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:33:48,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:33:48,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:33:48,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:33:48,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:33:48,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:33:48,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:33:48,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:33:48,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:33:48,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:33:48,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:33:48,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:33:48,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:33:48,236 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 02:33:48,265 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:33:48,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:33:48,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:33:48,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:33:48,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:33:48,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:33:48,267 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:33:48,267 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:33:48,267 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:33:48,267 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:33:48,267 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:33:48,267 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:33:48,268 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:33:48,268 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:33:48,268 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:33:48,268 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:33:48,268 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:33:48,268 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:33:48,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:33:48,271 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:33:48,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:33:48,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:33:48,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:33:48,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:33:48,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:33:48,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:33:48,273 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:33:48,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:33:48,273 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:33:48,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:33:48,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:33:48,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:33:48,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:33:48,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:33:48,274 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:33:48,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:33:48,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:33:48,275 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:33:48,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:33:48,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:33:48,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:33:48,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:33:48,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:33:48,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:33:48,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:33:48,526 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:33:48,526 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:33:48,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-03 02:33:49,715 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:33:49,961 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:33:49,967 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-03 02:33:49,986 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53ff44da/34c4890c02f4406cacf4b6f7d449c5e3/FLAG7c8ef7fe4 [2023-04-03 02:33:49,999 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53ff44da/34c4890c02f4406cacf4b6f7d449c5e3 [2023-04-03 02:33:50,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:33:50,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:33:50,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:33:50,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:33:50,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:33:50,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:33:50" (1/1) ... [2023-04-03 02:33:50,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dddccae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:33:50, skipping insertion in model container [2023-04-03 02:33:50,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:33:50" (1/1) ... [2023-04-03 02:33:50,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:33:50,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:33:50,395 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.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8112,8125] [2023-04-03 02:33:50,450 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.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14224,14237] [2023-04-03 02:33:50,459 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.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[16311,16324] [2023-04-03 02:33:50,464 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.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17335,17348] [2023-04-03 02:33:50,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:33:50,640 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:33:50,678 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.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8112,8125] [2023-04-03 02:33:50,706 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.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14224,14237] [2023-04-03 02:33:50,715 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.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[16311,16324] [2023-04-03 02:33:50,726 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.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17335,17348] [2023-04-03 02:33:50,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:33:50,882 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:33:50,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:33:50 WrapperNode [2023-04-03 02:33:50,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:33:50,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:33:50,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:33:50,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:33:50,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:33:50" (1/1) ... [2023-04-03 02:33:50,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:33:50" (1/1) ... [2023-04-03 02:33:50,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:33:50" (1/1) ... [2023-04-03 02:33:50,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:33:50" (1/1) ... [2023-04-03 02:33:50,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:33:50" (1/1) ... [2023-04-03 02:33:50,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:33:50" (1/1) ... [2023-04-03 02:33:50,991 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:33:50" (1/1) ... [2023-04-03 02:33:50,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:33:50" (1/1) ... [2023-04-03 02:33:51,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:33:51,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:33:51,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:33:51,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:33:51,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:33:50" (1/1) ... [2023-04-03 02:33:51,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:33:51,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:33:51,066 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 02:33:51,087 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 02:33:51,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:33:51,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:33:51,104 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:33:51,104 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:33:51,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:33:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:33:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:33:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:33:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:33:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:33:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:33:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:33:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:33:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:33:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:33:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:33:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:33:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:33:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:33:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:33:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:33:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:33:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:33:51,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:33:51,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:33:51,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:33:51,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:33:51,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:33:51,309 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:33:51,311 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:33:52,536 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:33:52,668 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:33:52,668 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:33:52,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:33:52 BoogieIcfgContainer [2023-04-03 02:33:52,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:33:52,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:33:52,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:33:52,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:33:52,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:33:50" (1/3) ... [2023-04-03 02:33:52,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fdfcab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:33:52, skipping insertion in model container [2023-04-03 02:33:52,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:33:50" (2/3) ... [2023-04-03 02:33:52,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fdfcab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:33:52, skipping insertion in model container [2023-04-03 02:33:52,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:33:52" (3/3) ... [2023-04-03 02:33:52,681 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-03 02:33:52,695 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:33:52,696 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-04-03 02:33:52,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:33:52,766 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;@33f8ce5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:33:52,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-04-03 02:33:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 417 states, 408 states have (on average 1.8651960784313726) internal successors, (761), 412 states have internal predecessors, (761), 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 02:33:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 02:33:52,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:52,788 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] [2023-04-03 02:33:52,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:52,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:52,795 INFO L85 PathProgramCache]: Analyzing trace with hash 983781207, now seen corresponding path program 1 times [2023-04-03 02:33:52,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:52,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280440572] [2023-04-03 02:33:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:52,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:53,221 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 02:33:53,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:53,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280440572] [2023-04-03 02:33:53,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280440572] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:53,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:53,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:33:53,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799186029] [2023-04-03 02:33:53,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:53,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:33:53,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:53,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:33:53,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:33:53,263 INFO L87 Difference]: Start difference. First operand has 417 states, 408 states have (on average 1.8651960784313726) internal successors, (761), 412 states have internal predecessors, (761), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 02:33:53,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:53,459 INFO L93 Difference]: Finished difference Result 620 states and 1089 transitions. [2023-04-03 02:33:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:33:53,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 52 [2023-04-03 02:33:53,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:53,476 INFO L225 Difference]: With dead ends: 620 [2023-04-03 02:33:53,476 INFO L226 Difference]: Without dead ends: 491 [2023-04-03 02:33:53,480 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 02:33:53,484 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 284 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:53,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1332 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:33:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2023-04-03 02:33:53,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 485. [2023-04-03 02:33:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 478 states have (on average 1.299163179916318) internal successors, (621), 481 states have internal predecessors, (621), 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 02:33:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 624 transitions. [2023-04-03 02:33:53,575 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 624 transitions. Word has length 52 [2023-04-03 02:33:53,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:53,575 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 624 transitions. [2023-04-03 02:33:53,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 02:33:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 624 transitions. [2023-04-03 02:33:53,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 02:33:53,585 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:53,585 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] [2023-04-03 02:33:53,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:33:53,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:53,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:53,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1932347716, now seen corresponding path program 1 times [2023-04-03 02:33:53,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:53,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371781514] [2023-04-03 02:33:53,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:53,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:53,812 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 02:33:53,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:53,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371781514] [2023-04-03 02:33:53,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371781514] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:53,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:53,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:33:53,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911077181] [2023-04-03 02:33:53,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:53,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:33:53,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:53,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:33:53,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:33:53,816 INFO L87 Difference]: Start difference. First operand 485 states and 624 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 02:33:53,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:53,879 INFO L93 Difference]: Finished difference Result 786 states and 1042 transitions. [2023-04-03 02:33:53,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:33:53,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 52 [2023-04-03 02:33:53,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:53,883 INFO L225 Difference]: With dead ends: 786 [2023-04-03 02:33:53,883 INFO L226 Difference]: Without dead ends: 616 [2023-04-03 02:33:53,884 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 02:33:53,885 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 267 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:53,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 892 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:33:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2023-04-03 02:33:53,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 610. [2023-04-03 02:33:53,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 603 states have (on average 1.3167495854063018) internal successors, (794), 606 states have internal predecessors, (794), 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 02:33:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 797 transitions. [2023-04-03 02:33:53,911 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 797 transitions. Word has length 52 [2023-04-03 02:33:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:53,911 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 797 transitions. [2023-04-03 02:33:53,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 02:33:53,912 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 797 transitions. [2023-04-03 02:33:53,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 02:33:53,913 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:53,913 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] [2023-04-03 02:33:53,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:33:53,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:53,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:53,914 INFO L85 PathProgramCache]: Analyzing trace with hash -684121472, now seen corresponding path program 1 times [2023-04-03 02:33:53,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:53,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676901685] [2023-04-03 02:33:53,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:53,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:54,027 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 02:33:54,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:54,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676901685] [2023-04-03 02:33:54,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676901685] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:54,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:54,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:33:54,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990922097] [2023-04-03 02:33:54,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:54,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:33:54,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:33:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:33:54,033 INFO L87 Difference]: Start difference. First operand 610 states and 797 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 02:33:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:54,150 INFO L93 Difference]: Finished difference Result 1074 states and 1432 transitions. [2023-04-03 02:33:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:33:54,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 52 [2023-04-03 02:33:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:54,156 INFO L225 Difference]: With dead ends: 1074 [2023-04-03 02:33:54,156 INFO L226 Difference]: Without dead ends: 845 [2023-04-03 02:33:54,159 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 02:33:54,161 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 254 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:54,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 930 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:33:54,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2023-04-03 02:33:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 838. [2023-04-03 02:33:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 831 states have (on average 1.3237063778580025) internal successors, (1100), 834 states have internal predecessors, (1100), 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 02:33:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1103 transitions. [2023-04-03 02:33:54,214 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1103 transitions. Word has length 52 [2023-04-03 02:33:54,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:54,216 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 1103 transitions. [2023-04-03 02:33:54,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 02:33:54,216 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1103 transitions. [2023-04-03 02:33:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 02:33:54,219 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:54,219 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] [2023-04-03 02:33:54,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:33:54,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:54,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash -790162403, now seen corresponding path program 1 times [2023-04-03 02:33:54,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:54,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727405678] [2023-04-03 02:33:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:54,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:54,410 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 02:33:54,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727405678] [2023-04-03 02:33:54,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727405678] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:54,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:54,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:33:54,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271619691] [2023-04-03 02:33:54,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:54,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:33:54,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:54,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:33:54,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:33:54,414 INFO L87 Difference]: Start difference. First operand 838 states and 1103 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 02:33:54,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:54,815 INFO L93 Difference]: Finished difference Result 1741 states and 2336 transitions. [2023-04-03 02:33:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:33:54,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 52 [2023-04-03 02:33:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:54,820 INFO L225 Difference]: With dead ends: 1741 [2023-04-03 02:33:54,820 INFO L226 Difference]: Without dead ends: 1071 [2023-04-03 02:33:54,824 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 02:33:54,829 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 1434 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1434 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:54,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1434 Valid, 350 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:33:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2023-04-03 02:33:54,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1065. [2023-04-03 02:33:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1058 states have (on average 1.3402646502835538) internal successors, (1418), 1061 states have internal predecessors, (1418), 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 02:33:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1421 transitions. [2023-04-03 02:33:54,929 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1421 transitions. Word has length 52 [2023-04-03 02:33:54,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:54,929 INFO L495 AbstractCegarLoop]: Abstraction has 1065 states and 1421 transitions. [2023-04-03 02:33:54,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 02:33:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1421 transitions. [2023-04-03 02:33:54,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:33:54,932 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:54,933 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] [2023-04-03 02:33:54,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:33:54,933 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:54,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:54,934 INFO L85 PathProgramCache]: Analyzing trace with hash 44233485, now seen corresponding path program 1 times [2023-04-03 02:33:54,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:54,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064998926] [2023-04-03 02:33:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:54,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:55,098 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 02:33:55,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:55,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064998926] [2023-04-03 02:33:55,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064998926] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:55,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:55,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:33:55,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116118681] [2023-04-03 02:33:55,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:55,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:33:55,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:55,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:33:55,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:33:55,101 INFO L87 Difference]: Start difference. First operand 1065 states and 1421 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 02:33:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:55,546 INFO L93 Difference]: Finished difference Result 2422 states and 3279 transitions. [2023-04-03 02:33:55,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:33:55,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 53 [2023-04-03 02:33:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:55,553 INFO L225 Difference]: With dead ends: 2422 [2023-04-03 02:33:55,553 INFO L226 Difference]: Without dead ends: 1525 [2023-04-03 02:33:55,555 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 02:33:55,555 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 1267 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:55,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1267 Valid, 302 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:33:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2023-04-03 02:33:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1518. [2023-04-03 02:33:55,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1511 states have (on average 1.342157511581734) internal successors, (2028), 1514 states have internal predecessors, (2028), 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 02:33:55,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2031 transitions. [2023-04-03 02:33:55,710 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2031 transitions. Word has length 53 [2023-04-03 02:33:55,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:55,710 INFO L495 AbstractCegarLoop]: Abstraction has 1518 states and 2031 transitions. [2023-04-03 02:33:55,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 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 02:33:55,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2031 transitions. [2023-04-03 02:33:55,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:33:55,712 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:55,712 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] [2023-04-03 02:33:55,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:33:55,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:55,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:55,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1159799177, now seen corresponding path program 1 times [2023-04-03 02:33:55,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:55,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743665509] [2023-04-03 02:33:55,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:55,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:55,958 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 02:33:55,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:55,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743665509] [2023-04-03 02:33:55,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743665509] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:55,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:55,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:33:55,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689401336] [2023-04-03 02:33:55,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:55,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:33:55,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:55,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:33:55,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:33:55,960 INFO L87 Difference]: Start difference. First operand 1518 states and 2031 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 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 02:33:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:57,115 INFO L93 Difference]: Finished difference Result 5558 states and 7670 transitions. [2023-04-03 02:33:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:33:57,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 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 54 [2023-04-03 02:33:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:57,137 INFO L225 Difference]: With dead ends: 5558 [2023-04-03 02:33:57,137 INFO L226 Difference]: Without dead ends: 5123 [2023-04-03 02:33:57,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:33:57,141 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 2635 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2635 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:57,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2635 Valid, 643 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:33:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5123 states. [2023-04-03 02:33:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5123 to 1530. [2023-04-03 02:33:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1523 states have (on average 1.3420879842416285) internal successors, (2044), 1526 states have internal predecessors, (2044), 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 02:33:57,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 2047 transitions. [2023-04-03 02:33:57,454 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 2047 transitions. Word has length 54 [2023-04-03 02:33:57,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:57,455 INFO L495 AbstractCegarLoop]: Abstraction has 1530 states and 2047 transitions. [2023-04-03 02:33:57,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 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 02:33:57,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 2047 transitions. [2023-04-03 02:33:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:33:57,457 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:57,457 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] [2023-04-03 02:33:57,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:33:57,457 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:57,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:57,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1736509228, now seen corresponding path program 1 times [2023-04-03 02:33:57,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:57,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577783239] [2023-04-03 02:33:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:57,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:57,566 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 02:33:57,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:57,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577783239] [2023-04-03 02:33:57,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577783239] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:57,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:57,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:33:57,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166181207] [2023-04-03 02:33:57,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:57,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:33:57,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:57,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:33:57,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:33:57,569 INFO L87 Difference]: Start difference. First operand 1530 states and 2047 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 02:33:58,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:58,118 INFO L93 Difference]: Finished difference Result 3766 states and 5130 transitions. [2023-04-03 02:33:58,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:33:58,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 54 [2023-04-03 02:33:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:58,127 INFO L225 Difference]: With dead ends: 3766 [2023-04-03 02:33:58,127 INFO L226 Difference]: Without dead ends: 2413 [2023-04-03 02:33:58,130 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 02:33:58,130 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 1056 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:58,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1056 Valid, 301 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:33:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2023-04-03 02:33:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1903. [2023-04-03 02:33:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1896 states have (on average 1.3581223628691983) internal successors, (2575), 1899 states have internal predecessors, (2575), 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 02:33:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2578 transitions. [2023-04-03 02:33:58,439 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2578 transitions. Word has length 54 [2023-04-03 02:33:58,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:58,439 INFO L495 AbstractCegarLoop]: Abstraction has 1903 states and 2578 transitions. [2023-04-03 02:33:58,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 02:33:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2578 transitions. [2023-04-03 02:33:58,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:33:58,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:58,441 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] [2023-04-03 02:33:58,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:33:58,442 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:58,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:58,442 INFO L85 PathProgramCache]: Analyzing trace with hash 508168948, now seen corresponding path program 1 times [2023-04-03 02:33:58,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:58,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119550805] [2023-04-03 02:33:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:58,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:58,614 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 02:33:58,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:58,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119550805] [2023-04-03 02:33:58,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119550805] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:58,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:58,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:33:58,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496268105] [2023-04-03 02:33:58,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:58,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:33:58,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:58,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:33:58,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:33:58,621 INFO L87 Difference]: Start difference. First operand 1903 states and 2578 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 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 02:34:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:00,447 INFO L93 Difference]: Finished difference Result 7540 states and 10415 transitions. [2023-04-03 02:34:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:34:00,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 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 55 [2023-04-03 02:34:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:00,473 INFO L225 Difference]: With dead ends: 7540 [2023-04-03 02:34:00,473 INFO L226 Difference]: Without dead ends: 6878 [2023-04-03 02:34:00,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:34:00,476 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 1638 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1638 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:00,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1638 Valid, 568 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:34:00,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6878 states. [2023-04-03 02:34:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6878 to 1925. [2023-04-03 02:34:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1918 states have (on average 1.3587069864442127) internal successors, (2606), 1921 states have internal predecessors, (2606), 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 02:34:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 2609 transitions. [2023-04-03 02:34:00,889 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 2609 transitions. Word has length 55 [2023-04-03 02:34:00,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:00,890 INFO L495 AbstractCegarLoop]: Abstraction has 1925 states and 2609 transitions. [2023-04-03 02:34:00,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 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 02:34:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 2609 transitions. [2023-04-03 02:34:00,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:34:00,892 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:00,892 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] [2023-04-03 02:34:00,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:34:00,892 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:00,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:00,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1667670399, now seen corresponding path program 1 times [2023-04-03 02:34:00,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:00,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142876378] [2023-04-03 02:34:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:00,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:01,053 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 02:34:01,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:01,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142876378] [2023-04-03 02:34:01,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142876378] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:01,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:01,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:34:01,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935248411] [2023-04-03 02:34:01,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:01,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:34:01,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:01,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:34:01,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:34:01,056 INFO L87 Difference]: Start difference. First operand 1925 states and 2609 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 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 02:34:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:02,603 INFO L93 Difference]: Finished difference Result 6802 states and 9318 transitions. [2023-04-03 02:34:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:34:02,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 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 55 [2023-04-03 02:34:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:02,625 INFO L225 Difference]: With dead ends: 6802 [2023-04-03 02:34:02,626 INFO L226 Difference]: Without dead ends: 6005 [2023-04-03 02:34:02,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:34:02,630 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 2113 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2113 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:02,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2113 Valid, 495 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:34:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2023-04-03 02:34:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 1939. [2023-04-03 02:34:03,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1932 states have (on average 1.3581780538302277) internal successors, (2624), 1935 states have internal predecessors, (2624), 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 02:34:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 2627 transitions. [2023-04-03 02:34:03,091 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 2627 transitions. Word has length 55 [2023-04-03 02:34:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:03,091 INFO L495 AbstractCegarLoop]: Abstraction has 1939 states and 2627 transitions. [2023-04-03 02:34:03,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 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 02:34:03,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 2627 transitions. [2023-04-03 02:34:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:34:03,093 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:03,093 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] [2023-04-03 02:34:03,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:34:03,093 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:03,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:03,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1599799743, now seen corresponding path program 1 times [2023-04-03 02:34:03,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:03,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632000029] [2023-04-03 02:34:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:03,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:03,449 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 02:34:03,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:03,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632000029] [2023-04-03 02:34:03,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632000029] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:03,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:03,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:34:03,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944453284] [2023-04-03 02:34:03,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:03,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:34:03,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:03,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:34:03,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:34:03,451 INFO L87 Difference]: Start difference. First operand 1939 states and 2627 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 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 02:34:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:05,258 INFO L93 Difference]: Finished difference Result 6191 states and 8489 transitions. [2023-04-03 02:34:05,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:34:05,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 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 56 [2023-04-03 02:34:05,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:05,274 INFO L225 Difference]: With dead ends: 6191 [2023-04-03 02:34:05,274 INFO L226 Difference]: Without dead ends: 4847 [2023-04-03 02:34:05,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:34:05,278 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 1681 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:05,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1681 Valid, 1046 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:34:05,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2023-04-03 02:34:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 1910. [2023-04-03 02:34:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1903 states have (on average 1.3573305307409353) internal successors, (2583), 1906 states have internal predecessors, (2583), 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 02:34:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2586 transitions. [2023-04-03 02:34:05,814 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2586 transitions. Word has length 56 [2023-04-03 02:34:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:05,814 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 2586 transitions. [2023-04-03 02:34:05,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 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 02:34:05,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2586 transitions. [2023-04-03 02:34:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:34:05,816 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:05,816 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] [2023-04-03 02:34:05,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:34:05,817 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:05,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:05,817 INFO L85 PathProgramCache]: Analyzing trace with hash 545739159, now seen corresponding path program 1 times [2023-04-03 02:34:05,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:05,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708179936] [2023-04-03 02:34:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:05,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:06,118 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 02:34:06,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:06,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708179936] [2023-04-03 02:34:06,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708179936] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:06,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:06,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:34:06,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613427707] [2023-04-03 02:34:06,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:06,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:34:06,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:06,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:34:06,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:34:06,121 INFO L87 Difference]: Start difference. First operand 1910 states and 2586 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 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 02:34:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:08,871 INFO L93 Difference]: Finished difference Result 6332 states and 8686 transitions. [2023-04-03 02:34:08,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:34:08,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 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 56 [2023-04-03 02:34:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:08,885 INFO L225 Difference]: With dead ends: 6332 [2023-04-03 02:34:08,885 INFO L226 Difference]: Without dead ends: 6327 [2023-04-03 02:34:08,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:34:08,887 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 1253 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:08,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1253 Valid, 1226 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:34:08,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6327 states. [2023-04-03 02:34:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6327 to 1910. [2023-04-03 02:34:09,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1903 states have (on average 1.3562795585916974) internal successors, (2581), 1906 states have internal predecessors, (2581), 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 02:34:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2584 transitions. [2023-04-03 02:34:09,472 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2584 transitions. Word has length 56 [2023-04-03 02:34:09,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:09,473 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 2584 transitions. [2023-04-03 02:34:09,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 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 02:34:09,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2584 transitions. [2023-04-03 02:34:09,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:34:09,477 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:09,477 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] [2023-04-03 02:34:09,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:34:09,478 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:09,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:09,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1746601044, now seen corresponding path program 1 times [2023-04-03 02:34:09,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:09,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289874770] [2023-04-03 02:34:09,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:09,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:09,784 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 02:34:09,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:09,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289874770] [2023-04-03 02:34:09,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289874770] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:09,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:09,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:34:09,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722421408] [2023-04-03 02:34:09,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:09,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:34:09,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:09,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:34:09,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:34:09,786 INFO L87 Difference]: Start difference. First operand 1910 states and 2584 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 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 02:34:11,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:11,149 INFO L93 Difference]: Finished difference Result 4883 states and 6674 transitions. [2023-04-03 02:34:11,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 02:34:11,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 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 56 [2023-04-03 02:34:11,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:11,157 INFO L225 Difference]: With dead ends: 4883 [2023-04-03 02:34:11,157 INFO L226 Difference]: Without dead ends: 3429 [2023-04-03 02:34:11,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:34:11,161 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 1704 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:11,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1704 Valid, 699 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:34:11,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2023-04-03 02:34:11,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 1910. [2023-04-03 02:34:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1903 states have (on average 1.3536521282186023) internal successors, (2576), 1906 states have internal predecessors, (2576), 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 02:34:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2579 transitions. [2023-04-03 02:34:11,622 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2579 transitions. Word has length 56 [2023-04-03 02:34:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:11,622 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 2579 transitions. [2023-04-03 02:34:11,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 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 02:34:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2579 transitions. [2023-04-03 02:34:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:34:11,625 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:11,625 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] [2023-04-03 02:34:11,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:34:11,625 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:11,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:11,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1105393668, now seen corresponding path program 1 times [2023-04-03 02:34:11,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:11,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066049757] [2023-04-03 02:34:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:11,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:11,685 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 02:34:11,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:11,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066049757] [2023-04-03 02:34:11,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066049757] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:11,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:11,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:34:11,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305357253] [2023-04-03 02:34:11,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:11,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:34:11,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:11,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:34:11,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:34:11,688 INFO L87 Difference]: Start difference. First operand 1910 states and 2579 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 02:34:12,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:12,201 INFO L93 Difference]: Finished difference Result 2661 states and 3609 transitions. [2023-04-03 02:34:12,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:34:12,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 57 [2023-04-03 02:34:12,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:12,205 INFO L225 Difference]: With dead ends: 2661 [2023-04-03 02:34:12,205 INFO L226 Difference]: Without dead ends: 1916 [2023-04-03 02:34:12,207 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 02:34:12,207 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 179 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:12,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 635 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:34:12,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2023-04-03 02:34:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1910. [2023-04-03 02:34:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1903 states have (on average 1.3368365738307935) internal successors, (2544), 1906 states have internal predecessors, (2544), 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 02:34:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2547 transitions. [2023-04-03 02:34:12,776 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2547 transitions. Word has length 57 [2023-04-03 02:34:12,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:12,777 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 2547 transitions. [2023-04-03 02:34:12,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 02:34:12,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2547 transitions. [2023-04-03 02:34:12,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:34:12,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:12,779 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] [2023-04-03 02:34:12,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:34:12,779 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:12,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:12,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1215150364, now seen corresponding path program 1 times [2023-04-03 02:34:12,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:12,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196099314] [2023-04-03 02:34:12,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:12,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:12,848 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 02:34:12,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:12,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196099314] [2023-04-03 02:34:12,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196099314] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:12,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:12,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:34:12,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95771476] [2023-04-03 02:34:12,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:12,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:34:12,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:12,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:34:12,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:34:12,849 INFO L87 Difference]: Start difference. First operand 1910 states and 2547 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 02:34:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:13,523 INFO L93 Difference]: Finished difference Result 2628 states and 3517 transitions. [2023-04-03 02:34:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:34:13,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 57 [2023-04-03 02:34:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:13,528 INFO L225 Difference]: With dead ends: 2628 [2023-04-03 02:34:13,528 INFO L226 Difference]: Without dead ends: 1917 [2023-04-03 02:34:13,530 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 02:34:13,531 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 163 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:13,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 624 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:34:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2023-04-03 02:34:14,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1910. [2023-04-03 02:34:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1903 states have (on average 1.3179190751445087) internal successors, (2508), 1906 states have internal predecessors, (2508), 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 02:34:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2511 transitions. [2023-04-03 02:34:14,007 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2511 transitions. Word has length 57 [2023-04-03 02:34:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:14,007 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 2511 transitions. [2023-04-03 02:34:14,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 02:34:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2511 transitions. [2023-04-03 02:34:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:34:14,009 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:14,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:34:14,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:34:14,010 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:14,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:14,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1950159519, now seen corresponding path program 1 times [2023-04-03 02:34:14,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:14,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039415407] [2023-04-03 02:34:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:14,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:14,072 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 02:34:14,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:14,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039415407] [2023-04-03 02:34:14,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039415407] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:14,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:14,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:34:14,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012052442] [2023-04-03 02:34:14,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:14,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:34:14,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:14,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:34:14,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:34:14,074 INFO L87 Difference]: Start difference. First operand 1910 states and 2511 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 02:34:14,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:14,578 INFO L93 Difference]: Finished difference Result 2410 states and 3159 transitions. [2023-04-03 02:34:14,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:34:14,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 57 [2023-04-03 02:34:14,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:14,582 INFO L225 Difference]: With dead ends: 2410 [2023-04-03 02:34:14,582 INFO L226 Difference]: Without dead ends: 1879 [2023-04-03 02:34:14,584 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 02:34:14,584 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 215 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:14,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 565 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:34:14,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2023-04-03 02:34:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1877. [2023-04-03 02:34:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1870 states have (on average 1.2925133689839572) internal successors, (2417), 1873 states have internal predecessors, (2417), 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 02:34:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 2420 transitions. [2023-04-03 02:34:15,128 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 2420 transitions. Word has length 57 [2023-04-03 02:34:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:15,128 INFO L495 AbstractCegarLoop]: Abstraction has 1877 states and 2420 transitions. [2023-04-03 02:34:15,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 02:34:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 2420 transitions. [2023-04-03 02:34:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:34:15,130 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:15,130 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] [2023-04-03 02:34:15,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:34:15,130 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:15,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:15,131 INFO L85 PathProgramCache]: Analyzing trace with hash 225359153, now seen corresponding path program 1 times [2023-04-03 02:34:15,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:15,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292465735] [2023-04-03 02:34:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:15,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:15,279 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 02:34:15,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:15,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292465735] [2023-04-03 02:34:15,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292465735] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:15,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:15,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:34:15,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092676434] [2023-04-03 02:34:15,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:15,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:34:15,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:15,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:34:15,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:34:15,282 INFO L87 Difference]: Start difference. First operand 1877 states and 2420 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 02:34:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:15,905 INFO L93 Difference]: Finished difference Result 1888 states and 2427 transitions. [2023-04-03 02:34:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:34:15,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 58 [2023-04-03 02:34:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:15,909 INFO L225 Difference]: With dead ends: 1888 [2023-04-03 02:34:15,909 INFO L226 Difference]: Without dead ends: 1721 [2023-04-03 02:34:15,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:34:15,910 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 589 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:15,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 595 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:34:15,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2023-04-03 02:34:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1712. [2023-04-03 02:34:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1705 states have (on average 1.2926686217008798) internal successors, (2204), 1708 states have internal predecessors, (2204), 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 02:34:16,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2207 transitions. [2023-04-03 02:34:16,471 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2207 transitions. Word has length 58 [2023-04-03 02:34:16,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:16,471 INFO L495 AbstractCegarLoop]: Abstraction has 1712 states and 2207 transitions. [2023-04-03 02:34:16,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 02:34:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2207 transitions. [2023-04-03 02:34:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:34:16,473 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:16,473 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] [2023-04-03 02:34:16,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:34:16,474 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:16,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:16,474 INFO L85 PathProgramCache]: Analyzing trace with hash -150592454, now seen corresponding path program 1 times [2023-04-03 02:34:16,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:16,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29304281] [2023-04-03 02:34:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:16,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:16,608 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 02:34:16,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:16,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29304281] [2023-04-03 02:34:16,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29304281] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:16,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:16,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:34:16,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484911296] [2023-04-03 02:34:16,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:16,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:34:16,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:16,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:34:16,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:34:16,610 INFO L87 Difference]: Start difference. First operand 1712 states and 2207 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 02:34:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:17,335 INFO L93 Difference]: Finished difference Result 3133 states and 4133 transitions. [2023-04-03 02:34:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:34:17,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 59 [2023-04-03 02:34:17,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:17,340 INFO L225 Difference]: With dead ends: 3133 [2023-04-03 02:34:17,340 INFO L226 Difference]: Without dead ends: 2427 [2023-04-03 02:34:17,342 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 02:34:17,342 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 141 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:17,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 521 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:34:17,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2023-04-03 02:34:18,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2299. [2023-04-03 02:34:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2292 states have (on average 1.2958115183246073) internal successors, (2970), 2295 states have internal predecessors, (2970), 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 02:34:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 2973 transitions. [2023-04-03 02:34:18,191 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 2973 transitions. Word has length 59 [2023-04-03 02:34:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:18,191 INFO L495 AbstractCegarLoop]: Abstraction has 2299 states and 2973 transitions. [2023-04-03 02:34:18,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 02:34:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 2973 transitions. [2023-04-03 02:34:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:34:18,194 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:18,195 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] [2023-04-03 02:34:18,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:34:18,195 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:18,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:18,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1787950553, now seen corresponding path program 1 times [2023-04-03 02:34:18,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:18,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657424760] [2023-04-03 02:34:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:18,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:34:18,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:18,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657424760] [2023-04-03 02:34:18,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657424760] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:18,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:18,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:34:18,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33543299] [2023-04-03 02:34:18,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:18,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:34:18,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:18,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:34:18,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:34:18,254 INFO L87 Difference]: Start difference. First operand 2299 states and 2973 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 02:34:19,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:19,005 INFO L93 Difference]: Finished difference Result 3595 states and 4660 transitions. [2023-04-03 02:34:19,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:34:19,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 59 [2023-04-03 02:34:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:19,009 INFO L225 Difference]: With dead ends: 3595 [2023-04-03 02:34:19,009 INFO L226 Difference]: Without dead ends: 2566 [2023-04-03 02:34:19,010 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 02:34:19,011 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 229 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:19,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 386 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:34:19,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2023-04-03 02:34:19,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 2189. [2023-04-03 02:34:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2182 states have (on average 1.2919340054995416) internal successors, (2819), 2185 states have internal predecessors, (2819), 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 02:34:19,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 2822 transitions. [2023-04-03 02:34:19,763 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 2822 transitions. Word has length 59 [2023-04-03 02:34:19,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:19,763 INFO L495 AbstractCegarLoop]: Abstraction has 2189 states and 2822 transitions. [2023-04-03 02:34:19,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 02:34:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 2822 transitions. [2023-04-03 02:34:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:34:19,764 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:19,765 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] [2023-04-03 02:34:19,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:34:19,765 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:19,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:19,765 INFO L85 PathProgramCache]: Analyzing trace with hash 827909709, now seen corresponding path program 1 times [2023-04-03 02:34:19,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:19,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961031432] [2023-04-03 02:34:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:19,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:20,316 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 02:34:20,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:20,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961031432] [2023-04-03 02:34:20,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961031432] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:20,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:20,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-03 02:34:20,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625383259] [2023-04-03 02:34:20,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:20,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-03 02:34:20,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:20,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-03 02:34:20,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-03 02:34:20,319 INFO L87 Difference]: Start difference. First operand 2189 states and 2822 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 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 02:34:22,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:22,289 INFO L93 Difference]: Finished difference Result 4670 states and 6035 transitions. [2023-04-03 02:34:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 02:34:22,289 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 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 59 [2023-04-03 02:34:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:22,295 INFO L225 Difference]: With dead ends: 4670 [2023-04-03 02:34:22,296 INFO L226 Difference]: Without dead ends: 4038 [2023-04-03 02:34:22,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:34:22,298 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1765 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:22,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 1299 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:34:22,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2023-04-03 02:34:23,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 2144. [2023-04-03 02:34:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2138 states have (on average 1.292797006548176) internal successors, (2764), 2140 states have internal predecessors, (2764), 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 02:34:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 2767 transitions. [2023-04-03 02:34:23,114 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 2767 transitions. Word has length 59 [2023-04-03 02:34:23,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:23,114 INFO L495 AbstractCegarLoop]: Abstraction has 2144 states and 2767 transitions. [2023-04-03 02:34:23,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 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 02:34:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 2767 transitions. [2023-04-03 02:34:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:34:23,116 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:23,116 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] [2023-04-03 02:34:23,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:34:23,116 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:23,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:23,117 INFO L85 PathProgramCache]: Analyzing trace with hash -972042972, now seen corresponding path program 1 times [2023-04-03 02:34:23,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:23,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160836464] [2023-04-03 02:34:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:23,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:24,115 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 02:34:24,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:24,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160836464] [2023-04-03 02:34:24,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160836464] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:24,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:24,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:34:24,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191619066] [2023-04-03 02:34:24,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:24,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:34:24,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:24,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:34:24,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:34:24,117 INFO L87 Difference]: Start difference. First operand 2144 states and 2767 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 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 02:34:27,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:27,205 INFO L93 Difference]: Finished difference Result 3837 states and 4925 transitions. [2023-04-03 02:34:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:34:27,206 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 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 59 [2023-04-03 02:34:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:27,211 INFO L225 Difference]: With dead ends: 3837 [2023-04-03 02:34:27,211 INFO L226 Difference]: Without dead ends: 3833 [2023-04-03 02:34:27,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2023-04-03 02:34:27,213 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1927 mSDsluCounter, 3196 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1927 SdHoareTripleChecker+Valid, 3554 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:27,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1927 Valid, 3554 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:34:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2023-04-03 02:34:28,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2156. [2023-04-03 02:34:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2150 states have (on average 1.2934883720930233) internal successors, (2781), 2152 states have internal predecessors, (2781), 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 02:34:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 2784 transitions. [2023-04-03 02:34:28,119 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 2784 transitions. Word has length 59 [2023-04-03 02:34:28,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:28,119 INFO L495 AbstractCegarLoop]: Abstraction has 2156 states and 2784 transitions. [2023-04-03 02:34:28,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 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 02:34:28,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 2784 transitions. [2023-04-03 02:34:28,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:34:28,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:28,120 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] [2023-04-03 02:34:28,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:34:28,121 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:28,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:28,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1371720225, now seen corresponding path program 1 times [2023-04-03 02:34:28,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:28,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576270681] [2023-04-03 02:34:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:28,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:28,182 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 02:34:28,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:28,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576270681] [2023-04-03 02:34:28,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576270681] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:28,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:28,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:34:28,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618065543] [2023-04-03 02:34:28,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:28,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:34:28,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:28,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:34:28,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:34:28,184 INFO L87 Difference]: Start difference. First operand 2156 states and 2784 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 02:34:29,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:29,600 INFO L93 Difference]: Finished difference Result 3517 states and 4549 transitions. [2023-04-03 02:34:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:34:29,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 59 [2023-04-03 02:34:29,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:29,604 INFO L225 Difference]: With dead ends: 3517 [2023-04-03 02:34:29,604 INFO L226 Difference]: Without dead ends: 2538 [2023-04-03 02:34:29,605 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 02:34:29,606 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 162 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:29,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 270 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:34:29,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2023-04-03 02:34:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2019. [2023-04-03 02:34:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2014 states have (on average 1.2909632571996028) internal successors, (2600), 2015 states have internal predecessors, (2600), 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 02:34:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 2603 transitions. [2023-04-03 02:34:30,419 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 2603 transitions. Word has length 59 [2023-04-03 02:34:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:30,420 INFO L495 AbstractCegarLoop]: Abstraction has 2019 states and 2603 transitions. [2023-04-03 02:34:30,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 02:34:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 2603 transitions. [2023-04-03 02:34:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:34:30,421 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:30,421 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] [2023-04-03 02:34:30,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-03 02:34:30,421 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:30,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:30,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1452202892, now seen corresponding path program 1 times [2023-04-03 02:34:30,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:30,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068562198] [2023-04-03 02:34:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:30,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:30,969 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 02:34:30,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:30,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068562198] [2023-04-03 02:34:30,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068562198] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:30,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:30,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:34:30,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602603148] [2023-04-03 02:34:30,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:30,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:34:30,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:30,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:34:30,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:34:30,971 INFO L87 Difference]: Start difference. First operand 2019 states and 2603 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 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 02:34:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:33,331 INFO L93 Difference]: Finished difference Result 4219 states and 5455 transitions. [2023-04-03 02:34:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-03 02:34:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 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 60 [2023-04-03 02:34:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:33,336 INFO L225 Difference]: With dead ends: 4219 [2023-04-03 02:34:33,336 INFO L226 Difference]: Without dead ends: 3599 [2023-04-03 02:34:33,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:34:33,338 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 1132 mSDsluCounter, 1924 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 2255 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:33,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1132 Valid, 2255 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:34:33,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3599 states. [2023-04-03 02:34:34,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3599 to 1982. [2023-04-03 02:34:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1978 states have (on average 1.2906976744186047) internal successors, (2553), 1978 states have internal predecessors, (2553), 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 02:34:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2556 transitions. [2023-04-03 02:34:34,165 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2556 transitions. Word has length 60 [2023-04-03 02:34:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:34,165 INFO L495 AbstractCegarLoop]: Abstraction has 1982 states and 2556 transitions. [2023-04-03 02:34:34,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 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 02:34:34,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2556 transitions. [2023-04-03 02:34:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-03 02:34:34,166 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:34,166 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] [2023-04-03 02:34:34,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:34:34,166 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:34,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:34,167 INFO L85 PathProgramCache]: Analyzing trace with hash -399329287, now seen corresponding path program 1 times [2023-04-03 02:34:34,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:34,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133550603] [2023-04-03 02:34:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:34,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:34,300 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 02:34:34,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:34,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133550603] [2023-04-03 02:34:34,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133550603] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:34,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:34,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:34:34,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669186333] [2023-04-03 02:34:34,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:34,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:34:34,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:34,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:34:34,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:34:34,305 INFO L87 Difference]: Start difference. First operand 1982 states and 2556 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 02:34:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:35,706 INFO L93 Difference]: Finished difference Result 4040 states and 5314 transitions. [2023-04-03 02:34:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:34:35,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 61 [2023-04-03 02:34:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:35,711 INFO L225 Difference]: With dead ends: 4040 [2023-04-03 02:34:35,711 INFO L226 Difference]: Without dead ends: 2892 [2023-04-03 02:34:35,712 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 02:34:35,713 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 72 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:35,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 352 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:34:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2023-04-03 02:34:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2598. [2023-04-03 02:34:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2594 states have (on average 1.2879722436391674) internal successors, (3341), 2594 states have internal predecessors, (3341), 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 02:34:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3344 transitions. [2023-04-03 02:34:36,977 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3344 transitions. Word has length 61 [2023-04-03 02:34:36,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:36,977 INFO L495 AbstractCegarLoop]: Abstraction has 2598 states and 3344 transitions. [2023-04-03 02:34:36,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 02:34:36,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3344 transitions. [2023-04-03 02:34:36,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-03 02:34:36,978 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:36,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:34:36,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-03 02:34:36,978 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:36,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:36,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1432058329, now seen corresponding path program 1 times [2023-04-03 02:34:36,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:36,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916661763] [2023-04-03 02:34:36,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:36,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:37,142 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 02:34:37,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:37,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916661763] [2023-04-03 02:34:37,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916661763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:37,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:37,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:34:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46059516] [2023-04-03 02:34:37,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:37,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:34:37,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:34:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:34:37,144 INFO L87 Difference]: Start difference. First operand 2598 states and 3344 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 02:34:39,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:39,104 INFO L93 Difference]: Finished difference Result 5466 states and 7158 transitions. [2023-04-03 02:34:39,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:34:39,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 65 [2023-04-03 02:34:39,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:39,109 INFO L225 Difference]: With dead ends: 5466 [2023-04-03 02:34:39,109 INFO L226 Difference]: Without dead ends: 3890 [2023-04-03 02:34:39,111 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 02:34:39,112 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 59 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:39,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 339 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:34:39,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2023-04-03 02:34:40,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3472. [2023-04-03 02:34:40,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 3468 states have (on average 1.280565167243368) internal successors, (4441), 3468 states have internal predecessors, (4441), 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 02:34:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 4444 transitions. [2023-04-03 02:34:40,727 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 4444 transitions. Word has length 65 [2023-04-03 02:34:40,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:40,727 INFO L495 AbstractCegarLoop]: Abstraction has 3472 states and 4444 transitions. [2023-04-03 02:34:40,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 02:34:40,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 4444 transitions. [2023-04-03 02:34:40,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-03 02:34:40,729 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:40,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:34:40,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-03 02:34:40,729 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:40,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:40,730 INFO L85 PathProgramCache]: Analyzing trace with hash -292656557, now seen corresponding path program 1 times [2023-04-03 02:34:40,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:40,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071003094] [2023-04-03 02:34:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:40,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:41,101 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 02:34:41,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:41,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071003094] [2023-04-03 02:34:41,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071003094] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:41,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:41,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:34:41,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288843801] [2023-04-03 02:34:41,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:41,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:34:41,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:41,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:34:41,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:34:41,104 INFO L87 Difference]: Start difference. First operand 3472 states and 4444 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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 02:34:44,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:44,236 INFO L93 Difference]: Finished difference Result 5428 states and 6915 transitions. [2023-04-03 02:34:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:34:44,237 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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 69 [2023-04-03 02:34:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:44,242 INFO L225 Difference]: With dead ends: 5428 [2023-04-03 02:34:44,242 INFO L226 Difference]: Without dead ends: 5426 [2023-04-03 02:34:44,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:34:44,243 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 958 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:44,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 1162 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:34:44,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2023-04-03 02:34:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 3924. [2023-04-03 02:34:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3920 states have (on average 1.2744897959183674) internal successors, (4996), 3920 states have internal predecessors, (4996), 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 02:34:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 4999 transitions. [2023-04-03 02:34:46,327 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 4999 transitions. Word has length 69 [2023-04-03 02:34:46,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:46,327 INFO L495 AbstractCegarLoop]: Abstraction has 3924 states and 4999 transitions. [2023-04-03 02:34:46,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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 02:34:46,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 4999 transitions. [2023-04-03 02:34:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:34:46,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:46,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:34:46,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-03 02:34:46,329 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:46,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash 338840757, now seen corresponding path program 1 times [2023-04-03 02:34:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:46,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251537889] [2023-04-03 02:34:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:46,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:46,448 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 02:34:46,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:46,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251537889] [2023-04-03 02:34:46,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251537889] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:46,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:46,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:34:46,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618390513] [2023-04-03 02:34:46,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:46,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:34:46,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:46,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:34:46,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:34:46,450 INFO L87 Difference]: Start difference. First operand 3924 states and 4999 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:34:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:50,621 INFO L93 Difference]: Finished difference Result 8214 states and 10518 transitions. [2023-04-03 02:34:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:34:50,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-03 02:34:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:50,631 INFO L225 Difference]: With dead ends: 8214 [2023-04-03 02:34:50,631 INFO L226 Difference]: Without dead ends: 7152 [2023-04-03 02:34:50,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:34:50,633 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1297 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:50,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1297 Valid, 351 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:34:50,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7152 states. [2023-04-03 02:34:53,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7152 to 3852. [2023-04-03 02:34:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3848 states have (on average 1.2754677754677755) internal successors, (4908), 3848 states have internal predecessors, (4908), 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 02:34:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 4911 transitions. [2023-04-03 02:34:53,316 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 4911 transitions. Word has length 72 [2023-04-03 02:34:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:53,321 INFO L495 AbstractCegarLoop]: Abstraction has 3852 states and 4911 transitions. [2023-04-03 02:34:53,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:34:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 4911 transitions. [2023-04-03 02:34:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:34:53,322 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:53,322 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] [2023-04-03 02:34:53,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-03 02:34:53,323 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:53,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:53,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1044273509, now seen corresponding path program 1 times [2023-04-03 02:34:53,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:53,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025084193] [2023-04-03 02:34:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:53,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:53,601 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 02:34:53,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:53,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025084193] [2023-04-03 02:34:53,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025084193] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:53,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:53,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:34:53,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054949109] [2023-04-03 02:34:53,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:53,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:34:53,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:53,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:34:53,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:34:53,603 INFO L87 Difference]: Start difference. First operand 3852 states and 4911 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 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 02:34:56,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:34:56,482 INFO L93 Difference]: Finished difference Result 4488 states and 5682 transitions. [2023-04-03 02:34:56,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:34:56,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 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 75 [2023-04-03 02:34:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:34:56,488 INFO L225 Difference]: With dead ends: 4488 [2023-04-03 02:34:56,488 INFO L226 Difference]: Without dead ends: 4486 [2023-04-03 02:34:56,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:34:56,489 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 273 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:34:56,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1034 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:34:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2023-04-03 02:34:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3794. [2023-04-03 02:34:58,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3790 states have (on average 1.2770448548812665) internal successors, (4840), 3790 states have internal predecessors, (4840), 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 02:34:58,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 4843 transitions. [2023-04-03 02:34:58,870 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 4843 transitions. Word has length 75 [2023-04-03 02:34:58,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:58,871 INFO L495 AbstractCegarLoop]: Abstraction has 3794 states and 4843 transitions. [2023-04-03 02:34:58,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 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 02:34:58,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 4843 transitions. [2023-04-03 02:34:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:34:58,873 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:58,873 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:34:58,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-04-03 02:34:58,873 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:58,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:58,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1924264278, now seen corresponding path program 1 times [2023-04-03 02:34:58,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:58,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407514302] [2023-04-03 02:34:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:58,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-03 02:34:59,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:59,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407514302] [2023-04-03 02:34:59,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407514302] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:34:59,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:34:59,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:34:59,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231497344] [2023-04-03 02:34:59,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:34:59,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:34:59,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:34:59,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:34:59,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:34:59,133 INFO L87 Difference]: Start difference. First operand 3794 states and 4843 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:03,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:03,351 INFO L93 Difference]: Finished difference Result 7843 states and 9990 transitions. [2023-04-03 02:35:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:35:03,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-03 02:35:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:03,358 INFO L225 Difference]: With dead ends: 7843 [2023-04-03 02:35:03,358 INFO L226 Difference]: Without dead ends: 6035 [2023-04-03 02:35:03,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:35:03,361 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 915 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:03,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 576 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:35:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6035 states. [2023-04-03 02:35:05,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6035 to 3754. [2023-04-03 02:35:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3754 states, 3750 states have (on average 1.2781333333333333) internal successors, (4793), 3750 states have internal predecessors, (4793), 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 02:35:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3754 states to 3754 states and 4796 transitions. [2023-04-03 02:35:05,400 INFO L78 Accepts]: Start accepts. Automaton has 3754 states and 4796 transitions. Word has length 77 [2023-04-03 02:35:05,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:05,401 INFO L495 AbstractCegarLoop]: Abstraction has 3754 states and 4796 transitions. [2023-04-03 02:35:05,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3754 states and 4796 transitions. [2023-04-03 02:35:05,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:35:05,402 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:05,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:05,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-04-03 02:35:05,402 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:05,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:05,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1005488996, now seen corresponding path program 1 times [2023-04-03 02:35:05,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:05,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666499964] [2023-04-03 02:35:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:05,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:06,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:06,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666499964] [2023-04-03 02:35:06,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666499964] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:35:06,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309984332] [2023-04-03 02:35:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:06,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:35:06,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:35:06,253 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:35:06,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:35:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:06,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-03 02:35:06,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:35:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:08,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:35:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:13,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309984332] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:35:13,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [472530497] [2023-04-03 02:35:13,373 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2023-04-03 02:35:13,373 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:35:13,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:35:13,380 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:35:13,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:35:15,671 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 340 for LOIs [2023-04-03 02:35:31,037 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6