/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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:30:51,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:30:51,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:30:51,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:30:51,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:30:51,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:30:51,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:30:51,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:30:51,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:30:51,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:30:51,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:30:51,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:30:51,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:30:51,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:30:51,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:30:51,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:30:51,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:30:51,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:30:51,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:30:51,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:30:51,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:30:51,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:30:51,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:30:51,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:30:51,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:30:51,193 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:30:51,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:30:51,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:30:51,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:30:51,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:30:51,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:30:51,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:30:51,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:30:51,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:30:51,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:30:51,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:30:51,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:30:51,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:30:51,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:30:51,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:30:51,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:30:51,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:30:51,236 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:30:51,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:30:51,236 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:30:51,236 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:30:51,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:30:51,237 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:30:51,238 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:30:51,238 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:30:51,238 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:30:51,238 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:30:51,238 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:30:51,238 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:30:51,239 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:30:51,239 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:30:51,239 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:30:51,239 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:30:51,239 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:30:51,239 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:30:51,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:30:51,240 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:30:51,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:30:51,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:30:51,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:30:51,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:30:51,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:30:51,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:30:51,241 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:30:51,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:30:51,242 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:30:51,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:30:51,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:30:51,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:30:51,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:30:51,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:30:51,243 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:30:51,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:30:51,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:30:51,243 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:30:51,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:30:51,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:30:51,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:30:51,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:30:51,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:30:51,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:30:51,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:30:51,495 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:30:51,495 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:30:51,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-01 06:30:52,763 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:30:53,079 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:30:53,079 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-01 06:30:53,092 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623ed6f3b/dac6bc87626b422d93132ff909b55b51/FLAG24a3cbbc4 [2023-04-01 06:30:53,107 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623ed6f3b/dac6bc87626b422d93132ff909b55b51 [2023-04-01 06:30:53,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:30:53,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:30:53,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:30:53,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:30:53,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:30:53,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:30:53" (1/1) ... [2023-04-01 06:30:53,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cd2d621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:53, skipping insertion in model container [2023-04-01 06:30:53,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:30:53" (1/1) ... [2023-04-01 06:30:53,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:30:53,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:30:53,447 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8127,8140] [2023-04-01 06:30:53,492 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14997,15010] [2023-04-01 06:30:53,517 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17084,17097] [2023-04-01 06:30:53,523 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18108,18121] [2023-04-01 06:30:53,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:30:53,711 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:30:53,758 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8127,8140] [2023-04-01 06:30:53,785 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14997,15010] [2023-04-01 06:30:53,796 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17084,17097] [2023-04-01 06:30:53,806 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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18108,18121] [2023-04-01 06:30:53,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:30:53,951 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:30:53,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:53 WrapperNode [2023-04-01 06:30:53,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:30:53,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:30:53,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:30:53,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:30:53,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:53" (1/1) ... [2023-04-01 06:30:53,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:53" (1/1) ... [2023-04-01 06:30:53,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:53" (1/1) ... [2023-04-01 06:30:53,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:53" (1/1) ... [2023-04-01 06:30:54,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:53" (1/1) ... [2023-04-01 06:30:54,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:53" (1/1) ... [2023-04-01 06:30:54,084 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:53" (1/1) ... [2023-04-01 06:30:54,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:53" (1/1) ... [2023-04-01 06:30:54,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:30:54,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:30:54,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:30:54,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:30:54,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:53" (1/1) ... [2023-04-01 06:30:54,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:30:54,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:30:54,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:30:54,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:30:54,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:30:54,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:30:54,189 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:30:54,189 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:30:54,189 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:30:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:30:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:30:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:30:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:30:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:30:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:30:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:30:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:30:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:30:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:30:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:30:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:30:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:30:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:30:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:30:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:30:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:30:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:30:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:30:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:30:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:30:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:30:54,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:30:54,427 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:30:54,429 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:30:55,620 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:30:55,730 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:30:55,731 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:30:55,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:30:55 BoogieIcfgContainer [2023-04-01 06:30:55,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:30:55,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:30:55,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:30:55,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:30:55,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:30:53" (1/3) ... [2023-04-01 06:30:55,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2358a931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:30:55, skipping insertion in model container [2023-04-01 06:30:55,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:53" (2/3) ... [2023-04-01 06:30:55,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2358a931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:30:55, skipping insertion in model container [2023-04-01 06:30:55,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:30:55" (3/3) ... [2023-04-01 06:30:55,743 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-01 06:30:55,792 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:30:55,792 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-04-01 06:30:55,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:30:55,861 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;@4fc3b671, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:30:55,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-04-01 06:30:55,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 423 states have (on average 1.8557919621749408) internal successors, (785), 427 states have internal predecessors, (785), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 06:30:55,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 06:30:55,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:55,888 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] [2023-04-01 06:30:55,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:55,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:55,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1562041499, now seen corresponding path program 1 times [2023-04-01 06:30:55,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:55,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030856928] [2023-04-01 06:30:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:55,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:56,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:56,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030856928] [2023-04-01 06:30:56,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030856928] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:56,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:56,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:30:56,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949894178] [2023-04-01 06:30:56,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:56,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:30:56,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:56,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:30:56,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:56,393 INFO L87 Difference]: Start difference. First operand has 432 states, 423 states have (on average 1.8557919621749408) internal successors, (785), 427 states have internal predecessors, (785), 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 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:56,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:56,588 INFO L93 Difference]: Finished difference Result 648 states and 1132 transitions. [2023-04-01 06:30:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:30:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 53 [2023-04-01 06:30:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:56,608 INFO L225 Difference]: With dead ends: 648 [2023-04-01 06:30:56,609 INFO L226 Difference]: Without dead ends: 519 [2023-04-01 06:30:56,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:56,622 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 397 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:56,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1300 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:30:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-04-01 06:30:56,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 513. [2023-04-01 06:30:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 506 states have (on average 1.3122529644268774) internal successors, (664), 509 states have internal predecessors, (664), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 667 transitions. [2023-04-01 06:30:56,715 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 667 transitions. Word has length 53 [2023-04-01 06:30:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:56,716 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 667 transitions. [2023-04-01 06:30:56,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 667 transitions. [2023-04-01 06:30:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 06:30:56,720 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:56,720 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] [2023-04-01 06:30:56,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:30:56,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:56,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:56,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1181913160, now seen corresponding path program 1 times [2023-04-01 06:30:56,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:56,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375214982] [2023-04-01 06:30:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:56,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:56,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:56,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375214982] [2023-04-01 06:30:56,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375214982] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:56,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:56,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:30:57,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814978129] [2023-04-01 06:30:57,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:57,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:30:57,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:57,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:30:57,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:30:57,009 INFO L87 Difference]: Start difference. First operand 513 states and 667 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) [2023-04-01 06:30:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:57,429 INFO L93 Difference]: Finished difference Result 904 states and 1198 transitions. [2023-04-01 06:30:57,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:30:57,430 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 [2023-04-01 06:30:57,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:57,433 INFO L225 Difference]: With dead ends: 904 [2023-04-01 06:30:57,433 INFO L226 Difference]: Without dead ends: 603 [2023-04-01 06:30:57,438 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 [2023-04-01 06:30:57,439 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1575 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1575 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:57,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1575 Valid, 351 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:30:57,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-04-01 06:30:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 596. [2023-04-01 06:30:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 589 states have (on average 1.3089983022071308) internal successors, (771), 592 states have internal predecessors, (771), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 774 transitions. [2023-04-01 06:30:57,524 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 774 transitions. Word has length 53 [2023-04-01 06:30:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:57,524 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 774 transitions. [2023-04-01 06:30:57,525 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) [2023-04-01 06:30:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 774 transitions. [2023-04-01 06:30:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 06:30:57,528 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:57,528 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] [2023-04-01 06:30:57,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:30:57,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:57,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:57,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1075872229, now seen corresponding path program 1 times [2023-04-01 06:30:57,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:57,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375199657] [2023-04-01 06:30:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:57,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:57,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:57,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375199657] [2023-04-01 06:30:57,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375199657] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:57,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:57,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:30:57,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029922979] [2023-04-01 06:30:57,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:57,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:30:57,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:57,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:30:57,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:57,656 INFO L87 Difference]: Start difference. First operand 596 states and 774 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:57,796 INFO L93 Difference]: Finished difference Result 1049 states and 1419 transitions. [2023-04-01 06:30:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:30:57,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 53 [2023-04-01 06:30:57,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:57,802 INFO L225 Difference]: With dead ends: 1049 [2023-04-01 06:30:57,802 INFO L226 Difference]: Without dead ends: 817 [2023-04-01 06:30:57,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:57,805 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 262 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:57,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 797 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:30:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-04-01 06:30:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 810. [2023-04-01 06:30:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 803 states have (on average 1.3387297633872977) internal successors, (1075), 806 states have internal predecessors, (1075), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:57,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1078 transitions. [2023-04-01 06:30:57,882 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1078 transitions. Word has length 53 [2023-04-01 06:30:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:57,884 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1078 transitions. [2023-04-01 06:30:57,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1078 transitions. [2023-04-01 06:30:57,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 06:30:57,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:57,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:30:57,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:30:57,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:57,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:57,889 INFO L85 PathProgramCache]: Analyzing trace with hash -557475636, now seen corresponding path program 1 times [2023-04-01 06:30:57,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:57,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147510771] [2023-04-01 06:30:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:57,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:58,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:58,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147510771] [2023-04-01 06:30:58,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147510771] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:58,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:58,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:30:58,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097792572] [2023-04-01 06:30:58,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:58,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:30:58,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:58,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:30:58,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:30:58,026 INFO L87 Difference]: Start difference. First operand 810 states and 1078 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) [2023-04-01 06:30:58,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:58,395 INFO L93 Difference]: Finished difference Result 1764 states and 2419 transitions. [2023-04-01 06:30:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:30:58,396 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 [2023-04-01 06:30:58,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:58,400 INFO L225 Difference]: With dead ends: 1764 [2023-04-01 06:30:58,400 INFO L226 Difference]: Without dead ends: 1109 [2023-04-01 06:30:58,402 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 [2023-04-01 06:30:58,403 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 1401 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:58,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1401 Valid, 341 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:30:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2023-04-01 06:30:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1103. [2023-04-01 06:30:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1096 states have (on average 1.3713503649635037) internal successors, (1503), 1099 states have internal predecessors, (1503), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:58,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1506 transitions. [2023-04-01 06:30:58,509 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1506 transitions. Word has length 53 [2023-04-01 06:30:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:58,510 INFO L495 AbstractCegarLoop]: Abstraction has 1103 states and 1506 transitions. [2023-04-01 06:30:58,510 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) [2023-04-01 06:30:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1506 transitions. [2023-04-01 06:30:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 06:30:58,511 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:58,512 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] [2023-04-01 06:30:58,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:30:58,512 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:58,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash 511774487, now seen corresponding path program 1 times [2023-04-01 06:30:58,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:58,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271771405] [2023-04-01 06:30:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:58,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:58,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:58,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271771405] [2023-04-01 06:30:58,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271771405] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:58,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:58,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:30:58,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934460714] [2023-04-01 06:30:58,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:58,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:30:58,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:58,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:30:58,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:30:58,628 INFO L87 Difference]: Start difference. First operand 1103 states and 1506 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) [2023-04-01 06:30:59,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:59,073 INFO L93 Difference]: Finished difference Result 2817 states and 3934 transitions. [2023-04-01 06:30:59,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:30:59,074 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 [2023-04-01 06:30:59,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:59,081 INFO L225 Difference]: With dead ends: 2817 [2023-04-01 06:30:59,082 INFO L226 Difference]: Without dead ends: 1804 [2023-04-01 06:30:59,083 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 [2023-04-01 06:30:59,084 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 1177 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:59,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1177 Valid, 309 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:30:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2023-04-01 06:30:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1798. [2023-04-01 06:30:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1791 states have (on average 1.379676158570631) internal successors, (2471), 1794 states have internal predecessors, (2471), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2474 transitions. [2023-04-01 06:30:59,260 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2474 transitions. Word has length 54 [2023-04-01 06:30:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:59,261 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 2474 transitions. [2023-04-01 06:30:59,261 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) [2023-04-01 06:30:59,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2474 transitions. [2023-04-01 06:30:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 06:30:59,263 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:59,263 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] [2023-04-01 06:30:59,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:30:59,263 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:59,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:59,264 INFO L85 PathProgramCache]: Analyzing trace with hash -235024366, now seen corresponding path program 1 times [2023-04-01 06:30:59,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:59,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015366787] [2023-04-01 06:30:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:59,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:59,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:59,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015366787] [2023-04-01 06:30:59,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015366787] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:59,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:59,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:30:59,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606738808] [2023-04-01 06:30:59,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:59,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:30:59,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:59,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:30:59,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:59,337 INFO L87 Difference]: Start difference. First operand 1798 states and 2474 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:59,716 INFO L93 Difference]: Finished difference Result 4562 states and 6318 transitions. [2023-04-01 06:30:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:30:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 55 [2023-04-01 06:30:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:59,728 INFO L225 Difference]: With dead ends: 4562 [2023-04-01 06:30:59,728 INFO L226 Difference]: Without dead ends: 2934 [2023-04-01 06:30:59,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:59,732 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 247 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:59,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 665 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:30:59,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2023-04-01 06:31:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2928. [2023-04-01 06:31:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2921 states have (on average 1.3622047244094488) internal successors, (3979), 2924 states have internal predecessors, (3979), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 3982 transitions. [2023-04-01 06:31:00,120 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 3982 transitions. Word has length 55 [2023-04-01 06:31:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:00,120 INFO L495 AbstractCegarLoop]: Abstraction has 2928 states and 3982 transitions. [2023-04-01 06:31:00,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 3982 transitions. [2023-04-01 06:31:00,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 06:31:00,123 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:00,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:31:00,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:31:00,123 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:00,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash 902638482, now seen corresponding path program 1 times [2023-04-01 06:31:00,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:00,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117289817] [2023-04-01 06:31:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:00,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:00,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:00,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117289817] [2023-04-01 06:31:00,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117289817] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:00,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:00,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 06:31:00,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054491182] [2023-04-01 06:31:00,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:00,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:31:00,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:00,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:31:00,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:31:00,276 INFO L87 Difference]: Start difference. First operand 2928 states and 3982 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2023-04-01 06:31:01,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:01,925 INFO L93 Difference]: Finished difference Result 9739 states and 13408 transitions. [2023-04-01 06:31:01,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 06:31:01,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 [2023-04-01 06:31:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:01,960 INFO L225 Difference]: With dead ends: 9739 [2023-04-01 06:31:01,960 INFO L226 Difference]: Without dead ends: 8644 [2023-04-01 06:31:01,967 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 [2023-04-01 06:31:01,968 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 2286 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2286 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:01,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2286 Valid, 515 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:31:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8644 states. [2023-04-01 06:31:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8644 to 2942. [2023-04-01 06:31:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 2935 states have (on average 1.361839863713799) internal successors, (3997), 2938 states have internal predecessors, (3997), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 4000 transitions. [2023-04-01 06:31:02,522 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 4000 transitions. Word has length 56 [2023-04-01 06:31:02,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:02,522 INFO L495 AbstractCegarLoop]: Abstraction has 2942 states and 4000 transitions. [2023-04-01 06:31:02,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2023-04-01 06:31:02,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 4000 transitions. [2023-04-01 06:31:02,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 06:31:02,525 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:02,525 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] [2023-04-01 06:31:02,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:31:02,525 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:02,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:02,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1067316345, now seen corresponding path program 1 times [2023-04-01 06:31:02,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:02,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747548435] [2023-04-01 06:31:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:02,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:02,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:02,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747548435] [2023-04-01 06:31:02,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747548435] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:02,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:02,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 06:31:02,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65318583] [2023-04-01 06:31:02,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:02,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:31:02,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:02,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:31:02,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:31:02,724 INFO L87 Difference]: Start difference. First operand 2942 states and 4000 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2023-04-01 06:31:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:04,915 INFO L93 Difference]: Finished difference Result 10795 states and 14944 transitions. [2023-04-01 06:31:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 06:31:04,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 [2023-04-01 06:31:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:04,954 INFO L225 Difference]: With dead ends: 10795 [2023-04-01 06:31:04,954 INFO L226 Difference]: Without dead ends: 9855 [2023-04-01 06:31:04,959 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 [2023-04-01 06:31:04,960 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 1772 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:04,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1772 Valid, 607 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:31:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2023-04-01 06:31:05,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 2964. [2023-04-01 06:31:05,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2964 states, 2957 states have (on average 1.3621914102130537) internal successors, (4028), 2960 states have internal predecessors, (4028), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:05,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2964 states to 2964 states and 4031 transitions. [2023-04-01 06:31:05,447 INFO L78 Accepts]: Start accepts. Automaton has 2964 states and 4031 transitions. Word has length 56 [2023-04-01 06:31:05,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:05,448 INFO L495 AbstractCegarLoop]: Abstraction has 2964 states and 4031 transitions. [2023-04-01 06:31:05,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2023-04-01 06:31:05,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2964 states and 4031 transitions. [2023-04-01 06:31:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 06:31:05,451 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:05,451 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] [2023-04-01 06:31:05,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:31:05,451 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:05,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:05,452 INFO L85 PathProgramCache]: Analyzing trace with hash -269158967, now seen corresponding path program 1 times [2023-04-01 06:31:05,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:05,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608003757] [2023-04-01 06:31:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:05,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:05,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:05,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608003757] [2023-04-01 06:31:05,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608003757] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:05,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:05,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 06:31:05,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345210430] [2023-04-01 06:31:05,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:05,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:31:05,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:05,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:31:05,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:31:05,611 INFO L87 Difference]: Start difference. First operand 2964 states and 4031 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2023-04-01 06:31:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:08,294 INFO L93 Difference]: Finished difference Result 12806 states and 17757 transitions. [2023-04-01 06:31:08,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 06:31:08,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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 [2023-04-01 06:31:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:08,323 INFO L225 Difference]: With dead ends: 12806 [2023-04-01 06:31:08,323 INFO L226 Difference]: Without dead ends: 11752 [2023-04-01 06:31:08,330 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 [2023-04-01 06:31:08,331 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 2602 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2602 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:08,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2602 Valid, 547 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:31:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11752 states. [2023-04-01 06:31:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11752 to 2998. [2023-04-01 06:31:09,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2991 states have (on average 1.3614175860916082) internal successors, (4072), 2994 states have internal predecessors, (4072), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 4075 transitions. [2023-04-01 06:31:09,057 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 4075 transitions. Word has length 56 [2023-04-01 06:31:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:09,057 INFO L495 AbstractCegarLoop]: Abstraction has 2998 states and 4075 transitions. [2023-04-01 06:31:09,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 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) [2023-04-01 06:31:09,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 4075 transitions. [2023-04-01 06:31:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 06:31:09,060 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:09,060 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] [2023-04-01 06:31:09,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:31:09,061 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:09,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1744464723, now seen corresponding path program 1 times [2023-04-01 06:31:09,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:09,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030444055] [2023-04-01 06:31:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:09,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:09,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030444055] [2023-04-01 06:31:09,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030444055] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:09,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:09,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 06:31:09,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895184147] [2023-04-01 06:31:09,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:09,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 06:31:09,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:09,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 06:31:09,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:31:09,408 INFO L87 Difference]: Start difference. First operand 2998 states and 4075 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:11,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:11,041 INFO L93 Difference]: Finished difference Result 7050 states and 9709 transitions. [2023-04-01 06:31:11,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 06:31:11,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 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 57 [2023-04-01 06:31:11,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:11,054 INFO L225 Difference]: With dead ends: 7050 [2023-04-01 06:31:11,054 INFO L226 Difference]: Without dead ends: 5018 [2023-04-01 06:31:11,058 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 [2023-04-01 06:31:11,059 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 1937 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1937 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:11,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1937 Valid, 732 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:31:11,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2023-04-01 06:31:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 2920. [2023-04-01 06:31:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2913 states have (on average 1.3601098523858566) internal successors, (3962), 2916 states have internal predecessors, (3962), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 3965 transitions. [2023-04-01 06:31:11,686 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 3965 transitions. Word has length 57 [2023-04-01 06:31:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:11,686 INFO L495 AbstractCegarLoop]: Abstraction has 2920 states and 3965 transitions. [2023-04-01 06:31:11,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 3965 transitions. [2023-04-01 06:31:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 06:31:11,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:11,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:31:11,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:31:11,689 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:11,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:11,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1364336384, now seen corresponding path program 1 times [2023-04-01 06:31:11,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:11,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263283972] [2023-04-01 06:31:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:11,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:12,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:12,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263283972] [2023-04-01 06:31:12,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263283972] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:12,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:12,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:31:12,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709171620] [2023-04-01 06:31:12,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:12,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:31:12,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:12,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:31:12,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:31:12,005 INFO L87 Difference]: Start difference. First operand 2920 states and 3965 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:14,734 INFO L93 Difference]: Finished difference Result 10791 states and 14878 transitions. [2023-04-01 06:31:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 06:31:14,734 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 57 [2023-04-01 06:31:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:14,757 INFO L225 Difference]: With dead ends: 10791 [2023-04-01 06:31:14,757 INFO L226 Difference]: Without dead ends: 8889 [2023-04-01 06:31:14,763 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 [2023-04-01 06:31:14,763 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 1386 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:14,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1386 Valid, 1385 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 06:31:14,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8889 states. [2023-04-01 06:31:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8889 to 2891. [2023-04-01 06:31:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2884 states have (on average 1.3595700416088765) internal successors, (3921), 2887 states have internal predecessors, (3921), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 3924 transitions. [2023-04-01 06:31:15,539 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 3924 transitions. Word has length 57 [2023-04-01 06:31:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:15,539 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 3924 transitions. [2023-04-01 06:31:15,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 3924 transitions. [2023-04-01 06:31:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 06:31:15,542 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:15,542 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] [2023-04-01 06:31:15,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 06:31:15,543 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:15,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:15,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1876570328, now seen corresponding path program 1 times [2023-04-01 06:31:15,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:15,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663947170] [2023-04-01 06:31:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:15,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:15,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:15,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663947170] [2023-04-01 06:31:15,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663947170] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:15,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:15,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:31:15,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725390972] [2023-04-01 06:31:15,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:15,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:31:15,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:15,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:31:15,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:31:15,852 INFO L87 Difference]: Start difference. First operand 2891 states and 3924 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:17,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:17,859 INFO L93 Difference]: Finished difference Result 6009 states and 8187 transitions. [2023-04-01 06:31:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:31:17,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 57 [2023-04-01 06:31:17,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:17,871 INFO L225 Difference]: With dead ends: 6009 [2023-04-01 06:31:17,872 INFO L226 Difference]: Without dead ends: 6004 [2023-04-01 06:31:17,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 06:31:17,874 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 1795 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:17,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1795 Valid, 1069 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 06:31:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6004 states. [2023-04-01 06:31:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6004 to 2891. [2023-04-01 06:31:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2884 states have (on average 1.358876560332871) internal successors, (3919), 2887 states have internal predecessors, (3919), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 3922 transitions. [2023-04-01 06:31:18,552 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 3922 transitions. Word has length 57 [2023-04-01 06:31:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:18,552 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 3922 transitions. [2023-04-01 06:31:18,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:18,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 3922 transitions. [2023-04-01 06:31:18,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 06:31:18,556 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:18,557 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] [2023-04-01 06:31:18,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 06:31:18,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:18,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:18,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1385910251, now seen corresponding path program 1 times [2023-04-01 06:31:18,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:18,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458347204] [2023-04-01 06:31:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:18,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:18,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:18,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458347204] [2023-04-01 06:31:18,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458347204] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:18,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:18,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:31:18,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412526742] [2023-04-01 06:31:18,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:18,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:31:18,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:18,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:31:18,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:18,632 INFO L87 Difference]: Start difference. First operand 2891 states and 3922 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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) [2023-04-01 06:31:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:19,573 INFO L93 Difference]: Finished difference Result 3950 states and 5384 transitions. [2023-04-01 06:31:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:31:19,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 [2023-04-01 06:31:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:19,580 INFO L225 Difference]: With dead ends: 3950 [2023-04-01 06:31:19,580 INFO L226 Difference]: Without dead ends: 2898 [2023-04-01 06:31:19,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:19,583 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 180 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:19,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 673 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:31:19,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2023-04-01 06:31:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2891. [2023-04-01 06:31:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2884 states have (on average 1.3422330097087378) internal successors, (3871), 2887 states have internal predecessors, (3871), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 3874 transitions. [2023-04-01 06:31:20,332 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 3874 transitions. Word has length 58 [2023-04-01 06:31:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:20,332 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 3874 transitions. [2023-04-01 06:31:20,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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) [2023-04-01 06:31:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 3874 transitions. [2023-04-01 06:31:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 06:31:20,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:20,335 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] [2023-04-01 06:31:20,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 06:31:20,335 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:20,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1495666947, now seen corresponding path program 1 times [2023-04-01 06:31:20,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:20,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327451783] [2023-04-01 06:31:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:20,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:20,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:20,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327451783] [2023-04-01 06:31:20,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327451783] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:20,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:20,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:31:20,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921468427] [2023-04-01 06:31:20,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:20,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:31:20,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:20,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:31:20,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:20,400 INFO L87 Difference]: Start difference. First operand 2891 states and 3874 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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) [2023-04-01 06:31:21,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:21,283 INFO L93 Difference]: Finished difference Result 4011 states and 5400 transitions. [2023-04-01 06:31:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:31:21,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 [2023-04-01 06:31:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:21,291 INFO L225 Difference]: With dead ends: 4011 [2023-04-01 06:31:21,291 INFO L226 Difference]: Without dead ends: 2897 [2023-04-01 06:31:21,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:21,293 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 196 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:21,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 679 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:31:21,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2023-04-01 06:31:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2891. [2023-04-01 06:31:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2884 states have (on average 1.3269764216366158) internal successors, (3827), 2887 states have internal predecessors, (3827), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 3830 transitions. [2023-04-01 06:31:22,117 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 3830 transitions. Word has length 58 [2023-04-01 06:31:22,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:22,117 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 3830 transitions. [2023-04-01 06:31:22,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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) [2023-04-01 06:31:22,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 3830 transitions. [2023-04-01 06:31:22,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 06:31:22,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:22,120 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] [2023-04-01 06:31:22,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 06:31:22,121 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:22,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:22,122 INFO L85 PathProgramCache]: Analyzing trace with hash 958916556, now seen corresponding path program 1 times [2023-04-01 06:31:22,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:22,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064569928] [2023-04-01 06:31:22,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:22,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:22,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:22,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064569928] [2023-04-01 06:31:22,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064569928] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:22,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:22,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:31:22,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616709185] [2023-04-01 06:31:22,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:22,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:31:22,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:22,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:31:22,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:22,188 INFO L87 Difference]: Start difference. First operand 2891 states and 3830 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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) [2023-04-01 06:31:23,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:23,099 INFO L93 Difference]: Finished difference Result 4040 states and 5383 transitions. [2023-04-01 06:31:23,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:31:23,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 [2023-04-01 06:31:23,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:23,105 INFO L225 Difference]: With dead ends: 4040 [2023-04-01 06:31:23,105 INFO L226 Difference]: Without dead ends: 2882 [2023-04-01 06:31:23,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:23,110 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 216 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:23,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 699 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:31:23,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2023-04-01 06:31:23,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2876. [2023-04-01 06:31:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2869 states have (on average 1.3067270826071802) internal successors, (3749), 2872 states have internal predecessors, (3749), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 3752 transitions. [2023-04-01 06:31:23,909 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 3752 transitions. Word has length 58 [2023-04-01 06:31:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:23,910 INFO L495 AbstractCegarLoop]: Abstraction has 2876 states and 3752 transitions. [2023-04-01 06:31:23,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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) [2023-04-01 06:31:23,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 3752 transitions. [2023-04-01 06:31:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 06:31:23,913 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:23,913 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:31:23,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 06:31:23,913 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:23,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:23,914 INFO L85 PathProgramCache]: Analyzing trace with hash -172349180, now seen corresponding path program 1 times [2023-04-01 06:31:23,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:23,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449206569] [2023-04-01 06:31:23,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:23,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:23,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:23,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449206569] [2023-04-01 06:31:23,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449206569] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:23,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:23,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:31:23,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502523344] [2023-04-01 06:31:23,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:23,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:31:23,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:31:23,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:23,975 INFO L87 Difference]: Start difference. First operand 2876 states and 3752 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) [2023-04-01 06:31:24,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:24,763 INFO L93 Difference]: Finished difference Result 4523 states and 5951 transitions. [2023-04-01 06:31:24,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:31:24,763 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 [2023-04-01 06:31:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:24,768 INFO L225 Difference]: With dead ends: 4523 [2023-04-01 06:31:24,769 INFO L226 Difference]: Without dead ends: 3222 [2023-04-01 06:31:24,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:24,773 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 284 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:24,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 481 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:31:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2023-04-01 06:31:25,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 2666. [2023-04-01 06:31:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2659 states have (on average 1.305377961639714) internal successors, (3471), 2662 states have internal predecessors, (3471), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 3474 transitions. [2023-04-01 06:31:25,640 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 3474 transitions. Word has length 59 [2023-04-01 06:31:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:25,641 INFO L495 AbstractCegarLoop]: Abstraction has 2666 states and 3474 transitions. [2023-04-01 06:31:25,641 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) [2023-04-01 06:31:25,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 3474 transitions. [2023-04-01 06:31:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 06:31:25,643 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:25,644 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] [2023-04-01 06:31:25,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 06:31:25,644 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:25,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:25,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1005451477, now seen corresponding path program 1 times [2023-04-01 06:31:25,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:25,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497587579] [2023-04-01 06:31:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:25,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:26,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497587579] [2023-04-01 06:31:26,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497587579] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:26,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:26,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 06:31:26,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103777460] [2023-04-01 06:31:26,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:26,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 06:31:26,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:26,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 06:31:26,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 06:31:26,273 INFO L87 Difference]: Start difference. First operand 2666 states and 3474 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) [2023-04-01 06:31:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:28,200 INFO L93 Difference]: Finished difference Result 4161 states and 5441 transitions. [2023-04-01 06:31:28,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 06:31:28,201 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 [2023-04-01 06:31:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:28,206 INFO L225 Difference]: With dead ends: 4161 [2023-04-01 06:31:28,206 INFO L226 Difference]: Without dead ends: 4157 [2023-04-01 06:31:28,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-01 06:31:28,208 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 1975 mSDsluCounter, 2396 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 2874 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:28,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1975 Valid, 2874 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:31:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2023-04-01 06:31:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 2662. [2023-04-01 06:31:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2656 states have (on average 1.3049698795180722) internal successors, (3466), 2658 states have internal predecessors, (3466), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3469 transitions. [2023-04-01 06:31:29,165 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3469 transitions. Word has length 60 [2023-04-01 06:31:29,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:29,166 INFO L495 AbstractCegarLoop]: Abstraction has 2662 states and 3469 transitions. [2023-04-01 06:31:29,166 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) [2023-04-01 06:31:29,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3469 transitions. [2023-04-01 06:31:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 06:31:29,168 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:29,168 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] [2023-04-01 06:31:29,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 06:31:29,169 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:29,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:29,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1468288075, now seen corresponding path program 1 times [2023-04-01 06:31:29,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:29,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66844888] [2023-04-01 06:31:29,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:29,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:29,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:29,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66844888] [2023-04-01 06:31:29,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66844888] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:29,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:29,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 06:31:29,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337876250] [2023-04-01 06:31:29,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:29,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 06:31:29,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:29,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 06:31:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 06:31:29,649 INFO L87 Difference]: Start difference. First operand 2662 states and 3469 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 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) [2023-04-01 06:31:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:31,795 INFO L93 Difference]: Finished difference Result 4420 states and 5794 transitions. [2023-04-01 06:31:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 06:31:31,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 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 [2023-04-01 06:31:31,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:31,800 INFO L225 Difference]: With dead ends: 4420 [2023-04-01 06:31:31,801 INFO L226 Difference]: Without dead ends: 3922 [2023-04-01 06:31:31,802 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 [2023-04-01 06:31:31,802 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 1842 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1842 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:31,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1842 Valid, 1597 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:31:31,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3922 states. [2023-04-01 06:31:32,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3922 to 2604. [2023-04-01 06:31:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2599 states have (on average 1.305886879569065) internal successors, (3394), 2600 states have internal predecessors, (3394), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 3397 transitions. [2023-04-01 06:31:32,728 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 3397 transitions. Word has length 60 [2023-04-01 06:31:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:32,728 INFO L495 AbstractCegarLoop]: Abstraction has 2604 states and 3397 transitions. [2023-04-01 06:31:32,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 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) [2023-04-01 06:31:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 3397 transitions. [2023-04-01 06:31:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 06:31:32,730 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:32,730 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] [2023-04-01 06:31:32,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 06:31:32,731 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:32,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2011747672, now seen corresponding path program 1 times [2023-04-01 06:31:32,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:32,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711632844] [2023-04-01 06:31:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:32,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:32,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:32,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711632844] [2023-04-01 06:31:32,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711632844] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:32,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:32,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:31:32,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135607494] [2023-04-01 06:31:32,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:32,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:31:32,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:32,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:31:32,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:32,787 INFO L87 Difference]: Start difference. First operand 2604 states and 3397 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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) [2023-04-01 06:31:34,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:34,087 INFO L93 Difference]: Finished difference Result 4359 states and 5705 transitions. [2023-04-01 06:31:34,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:31:34,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 [2023-04-01 06:31:34,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:34,092 INFO L225 Difference]: With dead ends: 4359 [2023-04-01 06:31:34,092 INFO L226 Difference]: Without dead ends: 2998 [2023-04-01 06:31:34,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:34,095 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 215 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:34,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 342 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:31:34,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2023-04-01 06:31:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2447. [2023-04-01 06:31:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2443 states have (on average 1.3057715923045436) internal successors, (3190), 2443 states have internal predecessors, (3190), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3193 transitions. [2023-04-01 06:31:34,890 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3193 transitions. Word has length 60 [2023-04-01 06:31:34,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:34,890 INFO L495 AbstractCegarLoop]: Abstraction has 2447 states and 3193 transitions. [2023-04-01 06:31:34,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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) [2023-04-01 06:31:34,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3193 transitions. [2023-04-01 06:31:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 06:31:34,893 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:34,893 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] [2023-04-01 06:31:34,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 06:31:34,894 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:34,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:34,894 INFO L85 PathProgramCache]: Analyzing trace with hash 876443249, now seen corresponding path program 1 times [2023-04-01 06:31:34,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:34,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137173636] [2023-04-01 06:31:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:34,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:34,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:34,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137173636] [2023-04-01 06:31:35,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137173636] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:35,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:35,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:31:35,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953152910] [2023-04-01 06:31:35,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:35,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:31:35,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:35,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:31:35,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:31:35,001 INFO L87 Difference]: Start difference. First operand 2447 states and 3193 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 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) [2023-04-01 06:31:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:35,939 INFO L93 Difference]: Finished difference Result 2453 states and 3196 transitions. [2023-04-01 06:31:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:31:35,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 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 [2023-04-01 06:31:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:35,943 INFO L225 Difference]: With dead ends: 2453 [2023-04-01 06:31:35,943 INFO L226 Difference]: Without dead ends: 2126 [2023-04-01 06:31:35,944 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 [2023-04-01 06:31:35,947 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 442 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:35,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 670 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:31:35,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2023-04-01 06:31:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 2122. [2023-04-01 06:31:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2118 states have (on average 1.3031161473087818) internal successors, (2760), 2118 states have internal predecessors, (2760), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:36,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 2763 transitions. [2023-04-01 06:31:36,742 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 2763 transitions. Word has length 60 [2023-04-01 06:31:36,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:36,743 INFO L495 AbstractCegarLoop]: Abstraction has 2122 states and 2763 transitions. [2023-04-01 06:31:36,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 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) [2023-04-01 06:31:36,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 2763 transitions. [2023-04-01 06:31:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 06:31:36,747 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:36,747 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] [2023-04-01 06:31:36,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-01 06:31:36,747 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:36,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:36,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1569536683, now seen corresponding path program 1 times [2023-04-01 06:31:36,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:36,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720138139] [2023-04-01 06:31:36,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:36,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:36,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:36,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720138139] [2023-04-01 06:31:36,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720138139] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:36,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:36,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:31:36,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960986998] [2023-04-01 06:31:36,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:36,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:31:36,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:36,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:31:36,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:36,916 INFO L87 Difference]: Start difference. First operand 2122 states and 2763 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) [2023-04-01 06:31:38,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:38,025 INFO L93 Difference]: Finished difference Result 3894 states and 5173 transitions. [2023-04-01 06:31:38,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:31:38,025 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 [2023-04-01 06:31:38,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:38,028 INFO L225 Difference]: With dead ends: 3894 [2023-04-01 06:31:38,028 INFO L226 Difference]: Without dead ends: 2876 [2023-04-01 06:31:38,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:38,030 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 113 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:38,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 470 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:31:38,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2023-04-01 06:31:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2682. [2023-04-01 06:31:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2678 states have (on average 1.2976101568334577) internal successors, (3475), 2678 states have internal predecessors, (3475), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 3478 transitions. [2023-04-01 06:31:39,018 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 3478 transitions. Word has length 61 [2023-04-01 06:31:39,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:39,018 INFO L495 AbstractCegarLoop]: Abstraction has 2682 states and 3478 transitions. [2023-04-01 06:31:39,018 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) [2023-04-01 06:31:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 3478 transitions. [2023-04-01 06:31:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 06:31:39,020 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:39,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:31:39,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-01 06:31:39,020 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:39,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:39,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1583937969, now seen corresponding path program 1 times [2023-04-01 06:31:39,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:31:39,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332456767] [2023-04-01 06:31:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:31:39,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:31:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:31:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:31:39,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:31:39,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332456767] [2023-04-01 06:31:39,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332456767] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:31:39,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:31:39,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:31:39,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506581143] [2023-04-01 06:31:39,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:31:39,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:31:39,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:39,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:31:39,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:39,145 INFO L87 Difference]: Start difference. First operand 2682 states and 3478 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:31:40,741 INFO L93 Difference]: Finished difference Result 5296 states and 7007 transitions. [2023-04-01 06:31:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:31:40,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2023-04-01 06:31:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:31:40,747 INFO L225 Difference]: With dead ends: 5296 [2023-04-01 06:31:40,747 INFO L226 Difference]: Without dead ends: 3858 [2023-04-01 06:31:40,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:31:40,750 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 101 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:31:40,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 458 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:31:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3858 states. [2023-04-01 06:31:42,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3858 to 3448. [2023-04-01 06:31:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3444 states have (on average 1.2944250871080138) internal successors, (4458), 3444 states have internal predecessors, (4458), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 4461 transitions. [2023-04-01 06:31:42,092 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 4461 transitions. Word has length 64 [2023-04-01 06:31:42,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:31:42,092 INFO L495 AbstractCegarLoop]: Abstraction has 3448 states and 4461 transitions. [2023-04-01 06:31:42,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:31:42,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 4461 transitions. [2023-04-01 06:31:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 06:31:42,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:31:42,094 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] [2023-04-01 06:31:42,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-01 06:31:42,095 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:31:42,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:31:42,095 INFO L85 PathProgramCache]: Analyzing trace with hash 138520932, now seen corresponding path program 1 times