/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.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:35:43,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:35:43,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:35:43,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:35:43,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:35:43,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:35:43,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:35:43,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:35:43,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:35:43,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:35:43,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:35:43,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:35:43,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:35:43,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:35:43,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:35:43,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:35:43,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:35:43,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:35:43,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:35:43,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:35:43,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:35:43,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:35:43,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:35:43,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:35:43,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:35:43,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:35:43,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:35:43,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:35:43,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:35:43,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:35:43,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:35:43,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:35:43,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:35:43,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:35:43,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:35:43,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:35:43,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:35:43,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:35:43,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:35:43,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:35:43,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:35:43,329 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:35:43,357 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:35:43,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:35:43,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:35:43,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:35:43,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:35:43,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:35:43,359 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:35:43,360 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:35:43,360 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:35:43,360 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:35:43,360 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:35:43,361 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:35:43,361 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:35:43,361 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:35:43,361 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:35:43,361 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:35:43,361 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:35:43,361 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:35:43,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:35:43,362 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:35:43,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:35:43,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:35:43,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:35:43,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:35:43,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:35:43,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:35:43,363 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:35:43,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:35:43,363 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:35:43,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:35:43,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:35:43,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:35:43,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:35:43,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:35:43,364 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:35:43,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:35:43,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:35:43,364 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:35:43,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:35:43,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:35:43,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:35:43,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:35:43,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:35:43,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:35:43,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:35:43,619 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:35:43,620 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:35:43,620 INFO L432 ainManager$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.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2023-04-03 02:35:44,793 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:35:45,077 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:35:45,077 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2023-04-03 02:35:45,094 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d05af121/4e6884d317ef4ac98512cc072256ee14/FLAGacdbbb6ba [2023-04-03 02:35:45,107 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d05af121/4e6884d317ef4ac98512cc072256ee14 [2023-04-03 02:35:45,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:35:45,110 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:35:45,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:35:45,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:35:45,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:35:45,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:35:45" (1/1) ... [2023-04-03 02:35:45,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4349fad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:45, skipping insertion in model container [2023-04-03 02:35:45,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:35:45" (1/1) ... [2023-04-03 02:35:45,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:35:45,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:35:45,376 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.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[8635,8648] [2023-04-03 02:35:45,411 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.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15820,15833] [2023-04-03 02:35:45,424 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.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[18017,18030] [2023-04-03 02:35:45,429 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.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[19041,19054] [2023-04-03 02:35:45,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:35:45,682 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:35:45,741 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.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[8635,8648] [2023-04-03 02:35:45,782 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.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[15820,15833] [2023-04-03 02:35:45,795 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.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[18017,18030] [2023-04-03 02:35:45,804 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.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[19041,19054] [2023-04-03 02:35:45,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:35:45,913 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:35:45,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:45 WrapperNode [2023-04-03 02:35:45,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:35:45,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:35:45,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:35:45,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:35:45,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:45" (1/1) ... [2023-04-03 02:35:45,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:45" (1/1) ... [2023-04-03 02:35:45,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:45" (1/1) ... [2023-04-03 02:35:45,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:45" (1/1) ... [2023-04-03 02:35:46,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:45" (1/1) ... [2023-04-03 02:35:46,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:45" (1/1) ... [2023-04-03 02:35:46,060 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:45" (1/1) ... [2023-04-03 02:35:46,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:45" (1/1) ... [2023-04-03 02:35:46,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:35:46,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:35:46,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:35:46,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:35:46,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:45" (1/1) ... [2023-04-03 02:35:46,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:35:46,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:35:46,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:35:46,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:35:46,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:35:46,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:35:46,161 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:35:46,161 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:35:46,161 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:35:46,161 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:35:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:35:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:35:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:35:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:35:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:35:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:35:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:35:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:35:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:35:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:35:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:35:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:35:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:35:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:35:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:35:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:35:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:35:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:35:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:35:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:35:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:35:46,407 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:35:46,409 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:35:47,647 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:35:47,766 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:35:47,766 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:35:47,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:35:47 BoogieIcfgContainer [2023-04-03 02:35:47,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:35:47,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:35:47,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:35:47,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:35:47,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:35:45" (1/3) ... [2023-04-03 02:35:47,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47d27345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:35:47, skipping insertion in model container [2023-04-03 02:35:47,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:35:45" (2/3) ... [2023-04-03 02:35:47,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47d27345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:35:47, skipping insertion in model container [2023-04-03 02:35:47,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:35:47" (3/3) ... [2023-04-03 02:35:47,780 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2023-04-03 02:35:47,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:35:47,796 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-04-03 02:35:47,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:35:47,872 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;@5923c092, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:35:47,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-04-03 02:35:47,882 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 428 states have (on average 1.852803738317757) internal successors, (793), 432 states have internal predecessors, (793), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:35:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:35:47,897 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:47,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:47,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:47,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:47,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1495070188, now seen corresponding path program 1 times [2023-04-03 02:35:47,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:47,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349689350] [2023-04-03 02:35:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:47,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:48,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:48,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349689350] [2023-04-03 02:35:48,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349689350] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:48,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:48,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:35:48,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873300777] [2023-04-03 02:35:48,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:48,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:35:48,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:48,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:35:48,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:48,444 INFO L87 Difference]: Start difference. First operand has 437 states, 428 states have (on average 1.852803738317757) internal successors, (793), 432 states have internal predecessors, (793), 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 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:48,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:48,588 INFO L93 Difference]: Finished difference Result 661 states and 1152 transitions. [2023-04-03 02:35:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:35:48,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 54 [2023-04-03 02:35:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:48,612 INFO L225 Difference]: With dead ends: 661 [2023-04-03 02:35:48,612 INFO L226 Difference]: Without dead ends: 528 [2023-04-03 02:35:48,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:48,623 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 401 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1319 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 [2023-04-03 02:35:48,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 1319 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:35:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-04-03 02:35:48,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 522. [2023-04-03 02:35:48,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 515 states have (on average 1.3067961165048543) internal successors, (673), 518 states have internal predecessors, (673), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:48,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 676 transitions. [2023-04-03 02:35:48,725 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 676 transitions. Word has length 54 [2023-04-03 02:35:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:48,726 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 676 transitions. [2023-04-03 02:35:48,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:48,727 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 676 transitions. [2023-04-03 02:35:48,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:35:48,734 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:48,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:48,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:35:48,735 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:48,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:48,735 INFO L85 PathProgramCache]: Analyzing trace with hash -441009604, now seen corresponding path program 1 times [2023-04-03 02:35:48,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:48,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780029299] [2023-04-03 02:35:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:48,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:49,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:49,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780029299] [2023-04-03 02:35:49,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780029299] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:49,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:49,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:35:49,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322579688] [2023-04-03 02:35:49,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:49,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:35:49,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:49,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:35:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:35:49,029 INFO L87 Difference]: Start difference. First operand 522 states and 676 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:49,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:49,463 INFO L93 Difference]: Finished difference Result 929 states and 1223 transitions. [2023-04-03 02:35:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:35:49,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-03 02:35:49,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:49,467 INFO L225 Difference]: With dead ends: 929 [2023-04-03 02:35:49,467 INFO L226 Difference]: Without dead ends: 620 [2023-04-03 02:35:49,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:35:49,471 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 1593 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:49,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1593 Valid, 361 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:35:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2023-04-03 02:35:49,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 613. [2023-04-03 02:35:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 606 states have (on average 1.3003300330033003) internal successors, (788), 609 states have internal predecessors, (788), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:49,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 791 transitions. [2023-04-03 02:35:49,536 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 791 transitions. Word has length 54 [2023-04-03 02:35:49,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:49,537 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 791 transitions. [2023-04-03 02:35:49,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:49,537 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 791 transitions. [2023-04-03 02:35:49,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:35:49,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:49,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:49,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:35:49,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:49,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:49,541 INFO L85 PathProgramCache]: Analyzing trace with hash -334968673, now seen corresponding path program 1 times [2023-04-03 02:35:49,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:49,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739207161] [2023-04-03 02:35:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:49,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:49,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:49,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739207161] [2023-04-03 02:35:49,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739207161] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:49,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:49,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:35:49,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747351260] [2023-04-03 02:35:49,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:49,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:35:49,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:49,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:35:49,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:49,651 INFO L87 Difference]: Start difference. First operand 613 states and 791 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:49,769 INFO L93 Difference]: Finished difference Result 1090 states and 1460 transitions. [2023-04-03 02:35:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:35:49,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 54 [2023-04-03 02:35:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:49,777 INFO L225 Difference]: With dead ends: 1090 [2023-04-03 02:35:49,777 INFO L226 Difference]: Without dead ends: 846 [2023-04-03 02:35:49,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:49,780 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 266 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 809 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 [2023-04-03 02:35:49,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 809 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:35:49,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2023-04-03 02:35:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 839. [2023-04-03 02:35:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 832 states have (on average 1.3269230769230769) internal successors, (1104), 835 states have internal predecessors, (1104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1107 transitions. [2023-04-03 02:35:49,845 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1107 transitions. Word has length 54 [2023-04-03 02:35:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:49,847 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1107 transitions. [2023-04-03 02:35:49,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1107 transitions. [2023-04-03 02:35:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:35:49,849 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:49,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:49,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:35:49,851 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:49,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash 183427920, now seen corresponding path program 1 times [2023-04-03 02:35:49,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:49,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028878533] [2023-04-03 02:35:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:49,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:50,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:50,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028878533] [2023-04-03 02:35:50,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028878533] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:50,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:50,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:35:50,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491015971] [2023-04-03 02:35:50,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:50,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:35:50,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:50,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:35:50,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:35:50,016 INFO L87 Difference]: Start difference. First operand 839 states and 1107 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:50,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:50,388 INFO L93 Difference]: Finished difference Result 1843 states and 2498 transitions. [2023-04-03 02:35:50,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:35:50,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-03 02:35:50,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:50,394 INFO L225 Difference]: With dead ends: 1843 [2023-04-03 02:35:50,394 INFO L226 Difference]: Without dead ends: 1160 [2023-04-03 02:35:50,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:35:50,401 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 1421 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:50,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1421 Valid, 350 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:35:50,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2023-04-03 02:35:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1154. [2023-04-03 02:35:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1147 states have (on average 1.3548387096774193) internal successors, (1554), 1150 states have internal predecessors, (1554), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:50,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1557 transitions. [2023-04-03 02:35:50,507 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1557 transitions. Word has length 54 [2023-04-03 02:35:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:50,509 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1557 transitions. [2023-04-03 02:35:50,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1557 transitions. [2023-04-03 02:35:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:35:50,511 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:50,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:50,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:35:50,512 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:50,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:50,513 INFO L85 PathProgramCache]: Analyzing trace with hash 80030381, now seen corresponding path program 1 times [2023-04-03 02:35:50,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:50,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516635694] [2023-04-03 02:35:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:50,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:50,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:50,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516635694] [2023-04-03 02:35:50,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516635694] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:50,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:50,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:35:50,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819538593] [2023-04-03 02:35:50,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:50,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:35:50,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:50,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:35:50,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:35:50,703 INFO L87 Difference]: Start difference. First operand 1154 states and 1557 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:51,195 INFO L93 Difference]: Finished difference Result 2964 states and 4081 transitions. [2023-04-03 02:35:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:35:51,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-03 02:35:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:51,203 INFO L225 Difference]: With dead ends: 2964 [2023-04-03 02:35:51,203 INFO L226 Difference]: Without dead ends: 1901 [2023-04-03 02:35:51,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:35:51,205 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 1194 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 318 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 [2023-04-03 02:35:51,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1194 Valid, 318 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:35:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2023-04-03 02:35:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1895. [2023-04-03 02:35:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1888 states have (on average 1.3601694915254237) internal successors, (2568), 1891 states have internal predecessors, (2568), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:51,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2571 transitions. [2023-04-03 02:35:51,446 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2571 transitions. Word has length 55 [2023-04-03 02:35:51,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:51,447 INFO L495 AbstractCegarLoop]: Abstraction has 1895 states and 2571 transitions. [2023-04-03 02:35:51,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:51,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2571 transitions. [2023-04-03 02:35:51,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:35:51,449 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:51,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:51,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:35:51,449 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:51,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:51,450 INFO L85 PathProgramCache]: Analyzing trace with hash 583459859, now seen corresponding path program 1 times [2023-04-03 02:35:51,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:51,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836479543] [2023-04-03 02:35:51,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:51,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:51,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:51,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836479543] [2023-04-03 02:35:51,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836479543] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:51,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:51,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:35:51,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446423750] [2023-04-03 02:35:51,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:51,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:35:51,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:51,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:35:51,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:51,596 INFO L87 Difference]: Start difference. First operand 1895 states and 2571 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:51,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:51,976 INFO L93 Difference]: Finished difference Result 4451 states and 6066 transitions. [2023-04-03 02:35:51,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:35:51,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 56 [2023-04-03 02:35:51,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:51,987 INFO L225 Difference]: With dead ends: 4451 [2023-04-03 02:35:51,987 INFO L226 Difference]: Without dead ends: 2929 [2023-04-03 02:35:51,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:51,990 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 251 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 675 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 [2023-04-03 02:35:51,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 675 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:35:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2023-04-03 02:35:52,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 2923. [2023-04-03 02:35:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2916 states have (on average 1.3401920438957475) internal successors, (3908), 2919 states have internal predecessors, (3908), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 3911 transitions. [2023-04-03 02:35:52,340 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 3911 transitions. Word has length 56 [2023-04-03 02:35:52,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:52,340 INFO L495 AbstractCegarLoop]: Abstraction has 2923 states and 3911 transitions. [2023-04-03 02:35:52,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 3911 transitions. [2023-04-03 02:35:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:35:52,342 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:52,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:52,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:35:52,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:52,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:52,344 INFO L85 PathProgramCache]: Analyzing trace with hash 87247720, now seen corresponding path program 1 times [2023-04-03 02:35:52,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:52,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462669010] [2023-04-03 02:35:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:52,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:52,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:52,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462669010] [2023-04-03 02:35:52,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462669010] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:52,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:52,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:35:52,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945025804] [2023-04-03 02:35:52,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:52,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:35:52,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:52,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:35:52,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:35:52,532 INFO L87 Difference]: Start difference. First operand 2923 states and 3911 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 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) [2023-04-03 02:35:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:54,170 INFO L93 Difference]: Finished difference Result 10106 states and 13676 transitions. [2023-04-03 02:35:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:35:54,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 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 [2023-04-03 02:35:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:54,206 INFO L225 Difference]: With dead ends: 10106 [2023-04-03 02:35:54,207 INFO L226 Difference]: Without dead ends: 8923 [2023-04-03 02:35:54,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:35:54,215 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 2316 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2316 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:54,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2316 Valid, 529 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:35:54,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8923 states. [2023-04-03 02:35:54,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8923 to 2937. [2023-04-03 02:35:54,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2937 states, 2930 states have (on average 1.3399317406143345) internal successors, (3926), 2933 states have internal predecessors, (3926), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2937 states to 2937 states and 3929 transitions. [2023-04-03 02:35:54,742 INFO L78 Accepts]: Start accepts. Automaton has 2937 states and 3929 transitions. Word has length 57 [2023-04-03 02:35:54,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:54,742 INFO L495 AbstractCegarLoop]: Abstraction has 2937 states and 3929 transitions. [2023-04-03 02:35:54,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 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) [2023-04-03 02:35:54,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2937 states and 3929 transitions. [2023-04-03 02:35:54,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:35:54,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:54,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:54,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:35:54,745 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:54,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:54,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1572039709, now seen corresponding path program 1 times [2023-04-03 02:35:54,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:54,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50069101] [2023-04-03 02:35:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:54,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:54,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:54,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50069101] [2023-04-03 02:35:54,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50069101] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:54,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:54,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:35:54,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706724997] [2023-04-03 02:35:54,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:54,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:35:54,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:54,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:35:54,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:35:54,917 INFO L87 Difference]: Start difference. First operand 2937 states and 3929 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 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) [2023-04-03 02:35:57,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:57,133 INFO L93 Difference]: Finished difference Result 11200 states and 15281 transitions. [2023-04-03 02:35:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:35:57,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 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 [2023-04-03 02:35:57,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:57,173 INFO L225 Difference]: With dead ends: 11200 [2023-04-03 02:35:57,173 INFO L226 Difference]: Without dead ends: 10188 [2023-04-03 02:35:57,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:35:57,180 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1799 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1799 SdHoareTripleChecker+Valid, 623 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 [2023-04-03 02:35:57,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1799 Valid, 623 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:35:57,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10188 states. [2023-04-03 02:35:57,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10188 to 2959. [2023-04-03 02:35:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2952 states have (on average 1.3404471544715446) internal successors, (3957), 2955 states have internal predecessors, (3957), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:57,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 3960 transitions. [2023-04-03 02:35:57,808 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 3960 transitions. Word has length 57 [2023-04-03 02:35:57,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:57,809 INFO L495 AbstractCegarLoop]: Abstraction has 2959 states and 3960 transitions. [2023-04-03 02:35:57,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 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) [2023-04-03 02:35:57,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 3960 transitions. [2023-04-03 02:35:57,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:35:57,811 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:57,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:35:57,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:35:57,811 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:57,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:57,812 INFO L85 PathProgramCache]: Analyzing trace with hash -112438110, now seen corresponding path program 1 times [2023-04-03 02:35:57,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:57,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440566881] [2023-04-03 02:35:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:57,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:35:57,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:57,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440566881] [2023-04-03 02:35:57,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440566881] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:57,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:57,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:35:57,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922432537] [2023-04-03 02:35:57,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:57,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:35:57,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:57,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:35:57,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:35:57,985 INFO L87 Difference]: Start difference. First operand 2959 states and 3960 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 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) [2023-04-03 02:36:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:00,498 INFO L93 Difference]: Finished difference Result 13419 states and 18287 transitions. [2023-04-03 02:36:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:36:00,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 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 [2023-04-03 02:36:00,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:00,538 INFO L225 Difference]: With dead ends: 13419 [2023-04-03 02:36:00,538 INFO L226 Difference]: Without dead ends: 12289 [2023-04-03 02:36:00,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:36:00,547 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 2647 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2647 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:00,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2647 Valid, 563 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:36:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12289 states. [2023-04-03 02:36:01,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12289 to 2993. [2023-04-03 02:36:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2986 states have (on average 1.339919624916276) internal successors, (4001), 2989 states have internal predecessors, (4001), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4004 transitions. [2023-04-03 02:36:01,176 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4004 transitions. Word has length 57 [2023-04-03 02:36:01,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:01,176 INFO L495 AbstractCegarLoop]: Abstraction has 2993 states and 4004 transitions. [2023-04-03 02:36:01,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 6 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) [2023-04-03 02:36:01,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4004 transitions. [2023-04-03 02:36:01,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:36:01,179 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:01,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:01,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:36:01,179 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:01,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:01,180 INFO L85 PathProgramCache]: Analyzing trace with hash -967421316, now seen corresponding path program 1 times [2023-04-03 02:36:01,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:01,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698315622] [2023-04-03 02:36:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:01,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:01,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:01,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698315622] [2023-04-03 02:36:01,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698315622] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:01,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:01,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:36:01,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308093702] [2023-04-03 02:36:01,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:01,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:36:01,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:01,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:36:01,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:36:01,562 INFO L87 Difference]: Start difference. First operand 2993 states and 4004 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:03,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:03,403 INFO L93 Difference]: Finished difference Result 6288 states and 8432 transitions. [2023-04-03 02:36:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:36:03,403 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 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 58 [2023-04-03 02:36:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:03,418 INFO L225 Difference]: With dead ends: 6288 [2023-04-03 02:36:03,418 INFO L226 Difference]: Without dead ends: 6283 [2023-04-03 02:36:03,420 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 [2023-04-03 02:36:03,421 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 1885 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1885 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:03,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1885 Valid, 1045 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:36:03,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6283 states. [2023-04-03 02:36:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6283 to 2993. [2023-04-03 02:36:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2986 states have (on average 1.3392498325519089) internal successors, (3999), 2989 states have internal predecessors, (3999), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4002 transitions. [2023-04-03 02:36:04,091 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4002 transitions. Word has length 58 [2023-04-03 02:36:04,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:04,091 INFO L495 AbstractCegarLoop]: Abstraction has 2993 states and 4002 transitions. [2023-04-03 02:36:04,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:04,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4002 transitions. [2023-04-03 02:36:04,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:36:04,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:04,094 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] [2023-04-03 02:36:04,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:36:04,094 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:04,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:04,095 INFO L85 PathProgramCache]: Analyzing trace with hash 86639268, now seen corresponding path program 1 times [2023-04-03 02:36:04,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:04,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486155689] [2023-04-03 02:36:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:04,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:04,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:04,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486155689] [2023-04-03 02:36:04,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486155689] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:04,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:04,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:36:04,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334233583] [2023-04-03 02:36:04,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:04,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:36:04,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:04,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:36:04,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:36:04,425 INFO L87 Difference]: Start difference. First operand 2993 states and 4002 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:06,447 INFO L93 Difference]: Finished difference Result 8554 states and 11523 transitions. [2023-04-03 02:36:06,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:36:06,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 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 58 [2023-04-03 02:36:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:06,462 INFO L225 Difference]: With dead ends: 8554 [2023-04-03 02:36:06,462 INFO L226 Difference]: Without dead ends: 6500 [2023-04-03 02:36:06,468 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 [2023-04-03 02:36:06,468 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 1898 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1898 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:06,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1898 Valid, 1100 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:36:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6500 states. [2023-04-03 02:36:07,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6500 to 2964. [2023-04-03 02:36:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2964 states, 2957 states have (on average 1.338518769022658) internal successors, (3958), 2960 states have internal predecessors, (3958), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2964 states to 2964 states and 3961 transitions. [2023-04-03 02:36:07,100 INFO L78 Accepts]: Start accepts. Automaton has 2964 states and 3961 transitions. Word has length 58 [2023-04-03 02:36:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:07,101 INFO L495 AbstractCegarLoop]: Abstraction has 2964 states and 3961 transitions. [2023-04-03 02:36:07,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:07,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2964 states and 3961 transitions. [2023-04-03 02:36:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:36:07,103 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:07,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:07,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:36:07,104 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:07,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2110024847, now seen corresponding path program 1 times [2023-04-03 02:36:07,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:07,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684768806] [2023-04-03 02:36:07,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:07,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:07,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:07,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684768806] [2023-04-03 02:36:07,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684768806] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:07,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:07,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:36:07,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642077061] [2023-04-03 02:36:07,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:07,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:36:07,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:07,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:36:07,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:36:07,386 INFO L87 Difference]: Start difference. First operand 2964 states and 3961 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:09,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:09,186 INFO L93 Difference]: Finished difference Result 7304 states and 9871 transitions. [2023-04-03 02:36:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 02:36:09,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 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 58 [2023-04-03 02:36:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:09,198 INFO L225 Difference]: With dead ends: 7304 [2023-04-03 02:36:09,198 INFO L226 Difference]: Without dead ends: 5108 [2023-04-03 02:36:09,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:36:09,205 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 1949 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1949 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:09,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1949 Valid, 764 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:36:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5108 states. [2023-04-03 02:36:09,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5108 to 2883. [2023-04-03 02:36:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2876 states have (on average 1.3369262865090403) internal successors, (3845), 2879 states have internal predecessors, (3845), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 3848 transitions. [2023-04-03 02:36:09,930 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 3848 transitions. Word has length 58 [2023-04-03 02:36:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:09,930 INFO L495 AbstractCegarLoop]: Abstraction has 2883 states and 3848 transitions. [2023-04-03 02:36:09,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 3848 transitions. [2023-04-03 02:36:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:36:09,934 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:09,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:09,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:36:09,934 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:09,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:09,935 INFO L85 PathProgramCache]: Analyzing trace with hash -878484794, now seen corresponding path program 1 times [2023-04-03 02:36:09,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:09,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137886937] [2023-04-03 02:36:09,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:09,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:10,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:10,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137886937] [2023-04-03 02:36:10,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137886937] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:10,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:10,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:36:10,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539248955] [2023-04-03 02:36:10,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:10,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:36:10,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:10,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:36:10,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:10,012 INFO L87 Difference]: Start difference. First operand 2883 states and 3848 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:10,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:10,935 INFO L93 Difference]: Finished difference Result 3984 states and 5340 transitions. [2023-04-03 02:36:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:36:10,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-03 02:36:10,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:10,941 INFO L225 Difference]: With dead ends: 3984 [2023-04-03 02:36:10,942 INFO L226 Difference]: Without dead ends: 2890 [2023-04-03 02:36:10,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:10,946 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 183 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:10,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 681 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:36:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2023-04-03 02:36:11,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 2883. [2023-04-03 02:36:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2876 states have (on average 1.3216272600834493) internal successors, (3801), 2879 states have internal predecessors, (3801), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 3804 transitions. [2023-04-03 02:36:11,862 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 3804 transitions. Word has length 59 [2023-04-03 02:36:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:11,862 INFO L495 AbstractCegarLoop]: Abstraction has 2883 states and 3804 transitions. [2023-04-03 02:36:11,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 3804 transitions. [2023-04-03 02:36:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:36:11,865 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:11,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:11,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:36:11,866 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:11,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:11,866 INFO L85 PathProgramCache]: Analyzing trace with hash -768728098, now seen corresponding path program 1 times [2023-04-03 02:36:11,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:11,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626589041] [2023-04-03 02:36:11,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:11,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:11,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:11,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626589041] [2023-04-03 02:36:11,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626589041] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:11,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:11,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:36:11,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264623970] [2023-04-03 02:36:11,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:11,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:36:11,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:11,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:36:11,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:11,934 INFO L87 Difference]: Start difference. First operand 2883 states and 3804 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:12,819 INFO L93 Difference]: Finished difference Result 4037 states and 5348 transitions. [2023-04-03 02:36:12,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:36:12,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-03 02:36:12,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:12,824 INFO L225 Difference]: With dead ends: 4037 [2023-04-03 02:36:12,824 INFO L226 Difference]: Without dead ends: 2889 [2023-04-03 02:36:12,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:12,827 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 199 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 687 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 [2023-04-03 02:36:12,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 687 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:36:12,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2023-04-03 02:36:13,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2883. [2023-04-03 02:36:13,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2876 states have (on average 1.3070236439499305) internal successors, (3759), 2879 states have internal predecessors, (3759), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 3762 transitions. [2023-04-03 02:36:13,482 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 3762 transitions. Word has length 59 [2023-04-03 02:36:13,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:13,482 INFO L495 AbstractCegarLoop]: Abstraction has 2883 states and 3762 transitions. [2023-04-03 02:36:13,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 3762 transitions. [2023-04-03 02:36:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:36:13,485 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:13,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:13,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:36:13,485 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:13,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash -343722844, now seen corresponding path program 1 times [2023-04-03 02:36:13,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:13,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607594547] [2023-04-03 02:36:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:13,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:13,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:13,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607594547] [2023-04-03 02:36:13,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607594547] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:13,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:13,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:36:13,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141118022] [2023-04-03 02:36:13,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:13,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:36:13,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:13,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:36:13,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:13,551 INFO L87 Difference]: Start difference. First operand 2883 states and 3762 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:14,323 INFO L93 Difference]: Finished difference Result 4123 states and 5406 transitions. [2023-04-03 02:36:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:36:14,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-03 02:36:14,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:14,328 INFO L225 Difference]: With dead ends: 4123 [2023-04-03 02:36:14,328 INFO L226 Difference]: Without dead ends: 2874 [2023-04-03 02:36:14,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:14,334 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 219 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 709 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 [2023-04-03 02:36:14,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 709 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:36:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2023-04-03 02:36:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2868. [2023-04-03 02:36:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2861 states have (on average 1.2897588255854597) internal successors, (3690), 2864 states have internal predecessors, (3690), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 3693 transitions. [2023-04-03 02:36:15,127 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 3693 transitions. Word has length 59 [2023-04-03 02:36:15,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:15,127 INFO L495 AbstractCegarLoop]: Abstraction has 2868 states and 3693 transitions. [2023-04-03 02:36:15,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 3693 transitions. [2023-04-03 02:36:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:36:15,129 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:15,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:15,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:36:15,130 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:15,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:15,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1423291097, now seen corresponding path program 1 times [2023-04-03 02:36:15,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:15,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574682214] [2023-04-03 02:36:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:15,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:15,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:15,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574682214] [2023-04-03 02:36:15,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574682214] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:15,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:15,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:36:15,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414930803] [2023-04-03 02:36:15,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:15,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:36:15,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:15,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:36:15,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:15,205 INFO L87 Difference]: Start difference. First operand 2868 states and 3693 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) [2023-04-03 02:36:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:16,151 INFO L93 Difference]: Finished difference Result 4741 states and 6135 transitions. [2023-04-03 02:36:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:36:16,151 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 [2023-04-03 02:36:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:16,156 INFO L225 Difference]: With dead ends: 4741 [2023-04-03 02:36:16,156 INFO L226 Difference]: Without dead ends: 3343 [2023-04-03 02:36:16,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:16,159 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 308 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:16,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 510 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:36:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2023-04-03 02:36:16,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 2658. [2023-04-03 02:36:16,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2651 states have (on average 1.2870614862316108) internal successors, (3412), 2654 states have internal predecessors, (3412), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3415 transitions. [2023-04-03 02:36:16,983 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3415 transitions. Word has length 60 [2023-04-03 02:36:16,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:16,983 INFO L495 AbstractCegarLoop]: Abstraction has 2658 states and 3415 transitions. [2023-04-03 02:36:16,983 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) [2023-04-03 02:36:16,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3415 transitions. [2023-04-03 02:36:16,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-03 02:36:16,985 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:16,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:16,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:36:16,986 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:16,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:16,986 INFO L85 PathProgramCache]: Analyzing trace with hash 344858694, now seen corresponding path program 1 times [2023-04-03 02:36:16,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:16,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906481794] [2023-04-03 02:36:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:16,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:18,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:18,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906481794] [2023-04-03 02:36:18,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906481794] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:18,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:18,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:36:18,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422138730] [2023-04-03 02:36:18,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:18,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:36:18,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:36:18,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:36:18,163 INFO L87 Difference]: Start difference. First operand 2658 states and 3415 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:21,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:21,212 INFO L93 Difference]: Finished difference Result 4533 states and 5792 transitions. [2023-04-03 02:36:21,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:36:21,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-03 02:36:21,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:21,219 INFO L225 Difference]: With dead ends: 4533 [2023-04-03 02:36:21,219 INFO L226 Difference]: Without dead ends: 4529 [2023-04-03 02:36:21,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2023-04-03 02:36:21,221 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 2883 mSDsluCounter, 4191 mSDsCounter, 0 mSdLazyCounter, 2245 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2883 SdHoareTripleChecker+Valid, 4645 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:21,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2883 Valid, 4645 Invalid, 2279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2245 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-03 02:36:21,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4529 states. [2023-04-03 02:36:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4529 to 2670. [2023-04-03 02:36:22,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2670 states, 2663 states have (on average 1.2876455125797972) internal successors, (3429), 2666 states have internal predecessors, (3429), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2670 states to 2670 states and 3432 transitions. [2023-04-03 02:36:22,060 INFO L78 Accepts]: Start accepts. Automaton has 2670 states and 3432 transitions. Word has length 61 [2023-04-03 02:36:22,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:22,060 INFO L495 AbstractCegarLoop]: Abstraction has 2670 states and 3432 transitions. [2023-04-03 02:36:22,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:22,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2670 states and 3432 transitions. [2023-04-03 02:36:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-03 02:36:22,062 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:22,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:22,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:36:22,063 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:22,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:22,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1361898426, now seen corresponding path program 1 times [2023-04-03 02:36:22,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:22,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433169910] [2023-04-03 02:36:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:22,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:22,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:22,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433169910] [2023-04-03 02:36:22,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433169910] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:22,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:22,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-03 02:36:22,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543371188] [2023-04-03 02:36:22,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:22,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-03 02:36:22,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:22,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-03 02:36:22,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-03 02:36:22,545 INFO L87 Difference]: Start difference. First operand 2670 states and 3432 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:24,550 INFO L93 Difference]: Finished difference Result 5009 states and 6451 transitions. [2023-04-03 02:36:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 02:36:24,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-03 02:36:24,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:24,556 INFO L225 Difference]: With dead ends: 5009 [2023-04-03 02:36:24,556 INFO L226 Difference]: Without dead ends: 4473 [2023-04-03 02:36:24,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:36:24,558 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 2149 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2149 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:24,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2149 Valid, 1920 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:36:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2023-04-03 02:36:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 2612. [2023-04-03 02:36:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2612 states, 2606 states have (on average 1.2881811204911742) internal successors, (3357), 2608 states have internal predecessors, (3357), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2612 states to 2612 states and 3360 transitions. [2023-04-03 02:36:25,394 INFO L78 Accepts]: Start accepts. Automaton has 2612 states and 3360 transitions. Word has length 61 [2023-04-03 02:36:25,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:25,394 INFO L495 AbstractCegarLoop]: Abstraction has 2612 states and 3360 transitions. [2023-04-03 02:36:25,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2612 states and 3360 transitions. [2023-04-03 02:36:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-03 02:36:25,396 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:25,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:25,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:36:25,396 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:25,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:25,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1560350621, now seen corresponding path program 1 times [2023-04-03 02:36:25,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:25,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571772374] [2023-04-03 02:36:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:25,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:25,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:25,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571772374] [2023-04-03 02:36:25,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571772374] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:25,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:25,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:36:25,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324577215] [2023-04-03 02:36:25,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:36:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:25,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:36:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:25,463 INFO L87 Difference]: Start difference. First operand 2612 states and 3360 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:26,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:26,628 INFO L93 Difference]: Finished difference Result 4373 states and 5639 transitions. [2023-04-03 02:36:26,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:36:26,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-03 02:36:26,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:26,632 INFO L225 Difference]: With dead ends: 4373 [2023-04-03 02:36:26,632 INFO L226 Difference]: Without dead ends: 3014 [2023-04-03 02:36:26,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:26,635 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 222 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:26,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 354 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:36:26,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2023-04-03 02:36:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 2457. [2023-04-03 02:36:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2457 states, 2452 states have (on average 1.286704730831974) internal successors, (3155), 2453 states have internal predecessors, (3155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 3158 transitions. [2023-04-03 02:36:27,429 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 3158 transitions. Word has length 61 [2023-04-03 02:36:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:27,429 INFO L495 AbstractCegarLoop]: Abstraction has 2457 states and 3158 transitions. [2023-04-03 02:36:27,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 3158 transitions. [2023-04-03 02:36:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:36:27,432 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:27,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:27,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:36:27,432 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:27,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:27,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1381796618, now seen corresponding path program 1 times [2023-04-03 02:36:27,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:27,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999145085] [2023-04-03 02:36:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:27,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:27,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:27,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999145085] [2023-04-03 02:36:27,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999145085] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:27,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:28,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:36:28,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899936746] [2023-04-03 02:36:28,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:28,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:36:28,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:28,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:36:28,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:36:28,001 INFO L87 Difference]: Start difference. First operand 2457 states and 3158 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:30,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:30,310 INFO L93 Difference]: Finished difference Result 4709 states and 6054 transitions. [2023-04-03 02:36:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:36:30,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-03 02:36:30,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:30,315 INFO L225 Difference]: With dead ends: 4709 [2023-04-03 02:36:30,315 INFO L226 Difference]: Without dead ends: 4204 [2023-04-03 02:36:30,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:36:30,316 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 1496 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:30,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1496 Valid, 3214 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:36:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2023-04-03 02:36:31,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 2420. [2023-04-03 02:36:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2416 states have (on average 1.2864238410596027) internal successors, (3108), 2416 states have internal predecessors, (3108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 3111 transitions. [2023-04-03 02:36:31,192 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 3111 transitions. Word has length 62 [2023-04-03 02:36:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:31,194 INFO L495 AbstractCegarLoop]: Abstraction has 2420 states and 3111 transitions. [2023-04-03 02:36:31,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:31,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 3111 transitions. [2023-04-03 02:36:31,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-03 02:36:31,199 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:31,199 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] [2023-04-03 02:36:31,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:36:31,199 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:31,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:31,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1168636020, now seen corresponding path program 1 times [2023-04-03 02:36:31,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:31,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090188768] [2023-04-03 02:36:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:31,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:31,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:31,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090188768] [2023-04-03 02:36:31,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090188768] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:31,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:31,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:36:31,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057182625] [2023-04-03 02:36:31,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:31,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:36:31,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:31,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:36:31,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:36:31,323 INFO L87 Difference]: Start difference. First operand 2420 states and 3111 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:32,507 INFO L93 Difference]: Finished difference Result 2426 states and 3114 transitions. [2023-04-03 02:36:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:36:32,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 63 [2023-04-03 02:36:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:32,510 INFO L225 Difference]: With dead ends: 2426 [2023-04-03 02:36:32,510 INFO L226 Difference]: Without dead ends: 2067 [2023-04-03 02:36:32,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:36:32,512 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 567 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:32,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 558 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:36:32,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2023-04-03 02:36:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 2063. [2023-04-03 02:36:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2059 states have (on average 1.2850898494414764) internal successors, (2646), 2059 states have internal predecessors, (2646), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:33,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 2649 transitions. [2023-04-03 02:36:33,398 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 2649 transitions. Word has length 63 [2023-04-03 02:36:33,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:33,398 INFO L495 AbstractCegarLoop]: Abstraction has 2063 states and 2649 transitions. [2023-04-03 02:36:33,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 2649 transitions. [2023-04-03 02:36:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 02:36:33,400 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:33,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:33,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-03 02:36:33,401 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:33,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:33,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1437696197, now seen corresponding path program 1 times [2023-04-03 02:36:33,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:33,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693398420] [2023-04-03 02:36:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:33,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:33,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:33,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693398420] [2023-04-03 02:36:33,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693398420] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:33,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:33,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:36:33,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546539143] [2023-04-03 02:36:33,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:33,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:36:33,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:33,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:36:33,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:33,535 INFO L87 Difference]: Start difference. First operand 2063 states and 2649 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:34,998 INFO L93 Difference]: Finished difference Result 3976 states and 5200 transitions. [2023-04-03 02:36:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:36:34,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2023-04-03 02:36:34,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:35,002 INFO L225 Difference]: With dead ends: 3976 [2023-04-03 02:36:35,002 INFO L226 Difference]: Without dead ends: 2864 [2023-04-03 02:36:35,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:35,004 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 100 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 464 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 [2023-04-03 02:36:35,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 464 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:36:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2023-04-03 02:36:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2670. [2023-04-03 02:36:36,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2670 states, 2666 states have (on average 1.281695423855964) internal successors, (3417), 2666 states have internal predecessors, (3417), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2670 states to 2670 states and 3420 transitions. [2023-04-03 02:36:36,045 INFO L78 Accepts]: Start accepts. Automaton has 2670 states and 3420 transitions. Word has length 64 [2023-04-03 02:36:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:36,045 INFO L495 AbstractCegarLoop]: Abstraction has 2670 states and 3420 transitions. [2023-04-03 02:36:36,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2670 states and 3420 transitions. [2023-04-03 02:36:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-03 02:36:36,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:36,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:36,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:36:36,047 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:36,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash 600195030, now seen corresponding path program 1 times [2023-04-03 02:36:36,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:36,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023617251] [2023-04-03 02:36:36,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:36,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:36,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:36,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023617251] [2023-04-03 02:36:36,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023617251] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:36,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:36,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:36:36,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438175217] [2023-04-03 02:36:36,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:36,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:36:36,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:36,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:36:36,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:36,171 INFO L87 Difference]: Start difference. First operand 2670 states and 3420 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:37,903 INFO L93 Difference]: Finished difference Result 5440 states and 7090 transitions. [2023-04-03 02:36:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:36:37,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-03 02:36:37,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:37,908 INFO L225 Difference]: With dead ends: 5440 [2023-04-03 02:36:37,908 INFO L226 Difference]: Without dead ends: 3882 [2023-04-03 02:36:37,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:37,911 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 89 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:37,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 452 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:36:37,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2023-04-03 02:36:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3508. [2023-04-03 02:36:39,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3508 states, 3504 states have (on average 1.2762557077625571) internal successors, (4472), 3504 states have internal predecessors, (4472), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:39,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3508 states to 3508 states and 4475 transitions. [2023-04-03 02:36:39,361 INFO L78 Accepts]: Start accepts. Automaton has 3508 states and 4475 transitions. Word has length 67 [2023-04-03 02:36:39,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:39,361 INFO L495 AbstractCegarLoop]: Abstraction has 3508 states and 4475 transitions. [2023-04-03 02:36:39,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3508 states and 4475 transitions. [2023-04-03 02:36:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-03 02:36:39,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:39,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:39,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-03 02:36:39,364 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:39,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1904679361, now seen corresponding path program 1 times [2023-04-03 02:36:39,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:39,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778447575] [2023-04-03 02:36:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:39,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:39,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:39,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778447575] [2023-04-03 02:36:39,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778447575] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:39,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:39,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:36:39,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635366802] [2023-04-03 02:36:39,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:39,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:36:39,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:39,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:36:39,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:39,484 INFO L87 Difference]: Start difference. First operand 3508 states and 4475 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:41,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:41,661 INFO L93 Difference]: Finished difference Result 7376 states and 9554 transitions. [2023-04-03 02:36:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:36:41,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 71 [2023-04-03 02:36:41,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:41,667 INFO L225 Difference]: With dead ends: 7376 [2023-04-03 02:36:41,667 INFO L226 Difference]: Without dead ends: 5268 [2023-04-03 02:36:41,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:41,670 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 76 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:41,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 436 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:36:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2023-04-03 02:36:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 4770. [2023-04-03 02:36:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 4766 states have (on average 1.2696181284095678) internal successors, (6051), 4766 states have internal predecessors, (6051), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 6054 transitions. [2023-04-03 02:36:43,678 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 6054 transitions. Word has length 71 [2023-04-03 02:36:43,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:43,679 INFO L495 AbstractCegarLoop]: Abstraction has 4770 states and 6054 transitions. [2023-04-03 02:36:43,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:43,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 6054 transitions. [2023-04-03 02:36:43,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:36:43,681 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:43,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:43,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-03 02:36:43,681 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:43,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:43,682 INFO L85 PathProgramCache]: Analyzing trace with hash -2013365517, now seen corresponding path program 1 times [2023-04-03 02:36:43,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:43,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958687274] [2023-04-03 02:36:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:43,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:44,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958687274] [2023-04-03 02:36:44,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958687274] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:44,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:44,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:36:44,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253641403] [2023-04-03 02:36:44,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:44,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:36:44,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:44,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:36:44,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:36:44,035 INFO L87 Difference]: Start difference. First operand 4770 states and 6054 transitions. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:48,081 INFO L93 Difference]: Finished difference Result 8160 states and 10380 transitions. [2023-04-03 02:36:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:36:48,081 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-03 02:36:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:48,089 INFO L225 Difference]: With dead ends: 8160 [2023-04-03 02:36:48,089 INFO L226 Difference]: Without dead ends: 8158 [2023-04-03 02:36:48,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:36:48,091 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 1218 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:48,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1218 Valid, 1396 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:36:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8158 states. [2023-04-03 02:36:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8158 to 5501. [2023-04-03 02:36:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5501 states, 5497 states have (on average 1.2659632526832818) internal successors, (6959), 5497 states have internal predecessors, (6959), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:50,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5501 states to 5501 states and 6962 transitions. [2023-04-03 02:36:50,618 INFO L78 Accepts]: Start accepts. Automaton has 5501 states and 6962 transitions. Word has length 75 [2023-04-03 02:36:50,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:50,619 INFO L495 AbstractCegarLoop]: Abstraction has 5501 states and 6962 transitions. [2023-04-03 02:36:50,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:50,619 INFO L276 IsEmpty]: Start isEmpty. Operand 5501 states and 6962 transitions. [2023-04-03 02:36:50,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:36:50,621 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:50,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:36:50,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-03 02:36:50,621 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:50,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:50,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1868624129, now seen corresponding path program 1 times [2023-04-03 02:36:50,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:50,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856105601] [2023-04-03 02:36:50,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:50,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:36:50,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:50,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856105601] [2023-04-03 02:36:50,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856105601] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:50,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:50,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:36:50,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546573381] [2023-04-03 02:36:50,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:50,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:36:50,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:50,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:36:50,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:36:50,745 INFO L87 Difference]: Start difference. First operand 5501 states and 6962 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:58,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:58,330 INFO L93 Difference]: Finished difference Result 16733 states and 21324 transitions. [2023-04-03 02:36:58,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:36:58,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 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 78 [2023-04-03 02:36:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:58,348 INFO L225 Difference]: With dead ends: 16733 [2023-04-03 02:36:58,348 INFO L226 Difference]: Without dead ends: 15099 [2023-04-03 02:36:58,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:36:58,354 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 1815 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1815 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:58,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1815 Valid, 432 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:36:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15099 states. [2023-04-03 02:37:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15099 to 5546. [2023-04-03 02:37:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5546 states, 5542 states have (on average 1.2650667629014796) internal successors, (7011), 5542 states have internal predecessors, (7011), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5546 states to 5546 states and 7014 transitions. [2023-04-03 02:37:01,048 INFO L78 Accepts]: Start accepts. Automaton has 5546 states and 7014 transitions. Word has length 78 [2023-04-03 02:37:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:01,048 INFO L495 AbstractCegarLoop]: Abstraction has 5546 states and 7014 transitions. [2023-04-03 02:37:01,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:01,048 INFO L276 IsEmpty]: Start isEmpty. Operand 5546 states and 7014 transitions. [2023-04-03 02:37:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-03 02:37:01,050 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:01,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:01,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-03 02:37:01,051 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:01,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:01,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1877378374, now seen corresponding path program 1 times [2023-04-03 02:37:01,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:01,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665699365] [2023-04-03 02:37:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:01,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:01,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:01,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665699365] [2023-04-03 02:37:01,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665699365] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:01,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:01,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:37:01,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32601372] [2023-04-03 02:37:01,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:01,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:37:01,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:01,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:37:01,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:37:01,109 INFO L87 Difference]: Start difference. First operand 5546 states and 7014 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:03,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:03,995 INFO L93 Difference]: Finished difference Result 8352 states and 10586 transitions. [2023-04-03 02:37:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:37:03,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2023-04-03 02:37:03,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:04,001 INFO L225 Difference]: With dead ends: 8352 [2023-04-03 02:37:04,002 INFO L226 Difference]: Without dead ends: 5823 [2023-04-03 02:37:04,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:37:04,005 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 173 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:04,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 297 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:37:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5823 states. [2023-04-03 02:37:06,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5823 to 5205. [2023-04-03 02:37:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5205 states, 5201 states have (on average 1.2603345510478754) internal successors, (6555), 5201 states have internal predecessors, (6555), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:06,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5205 states to 5205 states and 6558 transitions. [2023-04-03 02:37:06,443 INFO L78 Accepts]: Start accepts. Automaton has 5205 states and 6558 transitions. Word has length 81 [2023-04-03 02:37:06,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:06,443 INFO L495 AbstractCegarLoop]: Abstraction has 5205 states and 6558 transitions. [2023-04-03 02:37:06,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:06,443 INFO L276 IsEmpty]: Start isEmpty. Operand 5205 states and 6558 transitions. [2023-04-03 02:37:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-03 02:37:06,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:06,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:06,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-04-03 02:37:06,446 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:06,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:06,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1244409813, now seen corresponding path program 1 times [2023-04-03 02:37:06,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:06,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264872494] [2023-04-03 02:37:06,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:06,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:06,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:06,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264872494] [2023-04-03 02:37:06,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264872494] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:06,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:37:06,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:37:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820395582] [2023-04-03 02:37:06,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:06,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:37:06,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:37:06,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:37:06,805 INFO L87 Difference]: Start difference. First operand 5205 states and 6558 transitions. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:10,545 INFO L93 Difference]: Finished difference Result 7370 states and 9335 transitions. [2023-04-03 02:37:10,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-03 02:37:10,546 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2023-04-03 02:37:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:10,555 INFO L225 Difference]: With dead ends: 7370 [2023-04-03 02:37:10,555 INFO L226 Difference]: Without dead ends: 7368 [2023-04-03 02:37:10,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:37:10,557 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 690 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:10,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 1625 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:37:10,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7368 states. [2023-04-03 02:37:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7368 to 5405. [2023-04-03 02:37:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 5401 states have (on average 1.2593964080725792) internal successors, (6802), 5401 states have internal predecessors, (6802), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 6805 transitions. [2023-04-03 02:37:13,146 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 6805 transitions. Word has length 81 [2023-04-03 02:37:13,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:13,146 INFO L495 AbstractCegarLoop]: Abstraction has 5405 states and 6805 transitions. [2023-04-03 02:37:13,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 6805 transitions. [2023-04-03 02:37:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 02:37:13,148 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:13,148 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:13,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-04-03 02:37:13,148 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:13,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:13,149 INFO L85 PathProgramCache]: Analyzing trace with hash -370681097, now seen corresponding path program 1 times [2023-04-03 02:37:13,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:13,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676073244] [2023-04-03 02:37:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:13,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:14,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:14,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676073244] [2023-04-03 02:37:14,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676073244] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:37:14,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678384485] [2023-04-03 02:37:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:14,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:37:14,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:37:14,065 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:37:14,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:37:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:14,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-03 02:37:14,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:37:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-03 02:37:14,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:37:14,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678384485] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:14,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:37:14,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16] total 26 [2023-04-03 02:37:14,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119107175] [2023-04-03 02:37:14,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:14,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:37:14,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:14,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:37:14,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2023-04-03 02:37:14,911 INFO L87 Difference]: Start difference. First operand 5405 states and 6805 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:19,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:19,201 INFO L93 Difference]: Finished difference Result 9360 states and 11799 transitions. [2023-04-03 02:37:19,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-03 02:37:19,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2023-04-03 02:37:19,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:19,210 INFO L225 Difference]: With dead ends: 9360 [2023-04-03 02:37:19,210 INFO L226 Difference]: Without dead ends: 6669 [2023-04-03 02:37:19,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2023-04-03 02:37:19,215 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 1262 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:19,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 802 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:37:19,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6669 states. [2023-04-03 02:37:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6669 to 5373. [2023-04-03 02:37:21,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5373 states, 5369 states have (on average 1.2600111752654126) internal successors, (6765), 5369 states have internal predecessors, (6765), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5373 states to 5373 states and 6768 transitions. [2023-04-03 02:37:21,861 INFO L78 Accepts]: Start accepts. Automaton has 5373 states and 6768 transitions. Word has length 85 [2023-04-03 02:37:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:21,861 INFO L495 AbstractCegarLoop]: Abstraction has 5373 states and 6768 transitions. [2023-04-03 02:37:21,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 5373 states and 6768 transitions. [2023-04-03 02:37:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 02:37:21,863 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:21,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:21,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 02:37:22,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-04-03 02:37:22,072 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:22,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash -743914253, now seen corresponding path program 1 times [2023-04-03 02:37:22,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:22,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900056513] [2023-04-03 02:37:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:22,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:22,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:22,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900056513] [2023-04-03 02:37:22,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900056513] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:37:22,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138213026] [2023-04-03 02:37:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:22,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:37:22,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:37:22,993 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:37:23,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:37:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:23,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-03 02:37:23,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:37:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-03 02:37:23,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:37:23,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138213026] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:37:23,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:37:23,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2023-04-03 02:37:23,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795708463] [2023-04-03 02:37:23,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:37:23,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:37:23,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:37:23,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:37:23,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:37:23,605 INFO L87 Difference]: Start difference. First operand 5373 states and 6768 transitions. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:28,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:37:28,391 INFO L93 Difference]: Finished difference Result 11313 states and 14350 transitions. [2023-04-03 02:37:28,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 02:37:28,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2023-04-03 02:37:28,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:37:28,400 INFO L225 Difference]: With dead ends: 11313 [2023-04-03 02:37:28,401 INFO L226 Difference]: Without dead ends: 8749 [2023-04-03 02:37:28,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:37:28,405 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 641 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:37:28,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 780 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:37:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8749 states. [2023-04-03 02:37:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8749 to 5335. [2023-04-03 02:37:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5335 states, 5331 states have (on average 1.2603639092102794) internal successors, (6719), 5331 states have internal predecessors, (6719), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5335 states to 5335 states and 6722 transitions. [2023-04-03 02:37:31,158 INFO L78 Accepts]: Start accepts. Automaton has 5335 states and 6722 transitions. Word has length 85 [2023-04-03 02:37:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:37:31,159 INFO L495 AbstractCegarLoop]: Abstraction has 5335 states and 6722 transitions. [2023-04-03 02:37:31,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:37:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 5335 states and 6722 transitions. [2023-04-03 02:37:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:37:31,161 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:37:31,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:37:31,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 02:37:31,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:37:31,362 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:37:31,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:37:31,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1705743132, now seen corresponding path program 1 times [2023-04-03 02:37:31,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:37:31,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617552212] [2023-04-03 02:37:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:31,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:37:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:32,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:37:32,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617552212] [2023-04-03 02:37:32,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617552212] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:37:32,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325226905] [2023-04-03 02:37:32,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:37:32,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:37:32,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:37:32,721 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:37:32,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 02:37:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:37:33,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-03 02:37:33,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:37:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:34,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:37:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:37:38,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325226905] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:37:38,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1726516044] [2023-04-03 02:37:38,466 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2023-04-03 02:37:38,466 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:37:38,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:37:38,474 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:37:38,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:37:40,869 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 360 for LOIs [2023-04-03 02:38:00,680 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-03 02:38:01,353 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7