/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:31:40,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:31:41,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:31:41,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:31:41,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:31:41,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:31:41,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:31:41,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:31:41,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:31:41,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:31:41,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:31:41,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:31:41,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:31:41,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:31:41,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:31:41,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:31:41,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:31:41,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:31:41,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:31:41,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:31:41,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:31:41,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:31:41,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:31:41,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:31:41,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:31:41,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:31:41,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:31:41,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:31:41,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:31:41,050 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:31:41,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:31:41,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:31:41,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:31:41,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:31:41,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:31:41,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:31:41,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:31:41,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:31:41,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:31:41,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:31:41,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:31:41,057 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 02:31:41,082 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:31:41,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:31:41,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:31:41,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:31:41,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:31:41,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:31:41,085 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:31:41,085 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:31:41,085 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:31:41,086 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:31:41,086 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:31:41,086 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:31:41,087 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:31:41,087 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:31:41,087 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:31:41,087 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:31:41,087 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:31:41,087 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:31:41,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:31:41,088 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:31:41,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:31:41,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:31:41,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:31:41,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:31:41,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:31:41,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:31:41,089 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:31:41,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:31:41,090 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:31:41,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:31:41,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:31:41,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:31:41,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:31:41,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:31:41,091 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:31:41,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:31:41,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:31:41,091 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:31:41,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:31:41,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:31:41,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:31:41,092 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:31:41,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:31:41,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:31:41,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:31:41,351 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:31:41,351 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:31:41,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-03 02:31:42,494 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:31:42,772 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:31:42,773 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-03 02:31:42,784 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/202387a33/a3b48454b1e04791ab8fe7d09c78810f/FLAGee3bfb471 [2023-04-03 02:31:42,795 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/202387a33/a3b48454b1e04791ab8fe7d09c78810f [2023-04-03 02:31:42,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:31:42,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:31:42,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:31:42,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:31:42,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:31:42,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:31:42" (1/1) ... [2023-04-03 02:31:42,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2de0d8c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:42, skipping insertion in model container [2023-04-03 02:31:42,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:31:42" (1/1) ... [2023-04-03 02:31:42,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:31:42,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:31:43,113 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8127,8140] [2023-04-03 02:31:43,170 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14997,15010] [2023-04-03 02:31:43,180 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17084,17097] [2023-04-03 02:31:43,185 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18108,18121] [2023-04-03 02:31:43,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:31:43,408 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:31:43,467 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8127,8140] [2023-04-03 02:31:43,506 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14997,15010] [2023-04-03 02:31:43,518 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17084,17097] [2023-04-03 02:31:43,530 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18108,18121] [2023-04-03 02:31:43,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:31:43,687 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:31:43,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:43 WrapperNode [2023-04-03 02:31:43,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:31:43,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:31:43,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:31:43,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:31:43,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:43" (1/1) ... [2023-04-03 02:31:43,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:43" (1/1) ... [2023-04-03 02:31:43,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:43" (1/1) ... [2023-04-03 02:31:43,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:43" (1/1) ... [2023-04-03 02:31:43,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:43" (1/1) ... [2023-04-03 02:31:43,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:43" (1/1) ... [2023-04-03 02:31:43,804 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:43" (1/1) ... [2023-04-03 02:31:43,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:43" (1/1) ... [2023-04-03 02:31:43,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:31:43,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:31:43,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:31:43,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:31:43,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:43" (1/1) ... [2023-04-03 02:31:43,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:31:43,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:31:43,867 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 02:31:43,875 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 02:31:43,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:31:43,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:31:43,907 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:31:43,907 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:31:43,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:31:43,907 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:31:43,907 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:31:43,907 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:31:43,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:31:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:31:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:31:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:31:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:31:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:31:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:31:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:31:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:31:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:31:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:31:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:31:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:31:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:31:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:31:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:31:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:31:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:31:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:31:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:31:44,079 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:31:44,081 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:31:45,457 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:31:45,577 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:31:45,578 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:31:45,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:31:45 BoogieIcfgContainer [2023-04-03 02:31:45,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:31:45,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:31:45,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:31:45,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:31:45,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:31:42" (1/3) ... [2023-04-03 02:31:45,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae59a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:31:45, skipping insertion in model container [2023-04-03 02:31:45,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:43" (2/3) ... [2023-04-03 02:31:45,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae59a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:31:45, skipping insertion in model container [2023-04-03 02:31:45,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:31:45" (3/3) ... [2023-04-03 02:31:45,597 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-03 02:31:45,612 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:31:45,613 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-04-03 02:31:45,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:31:45,689 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;@19dafbc6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:31:45,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-04-03 02:31:45,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 423 states have (on average 1.8557919621749408) internal successors, (785), 427 states have internal predecessors, (785), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:31:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:31:45,725 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:45,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:31:45,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:45,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:45,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1562041499, now seen corresponding path program 1 times [2023-04-03 02:31:45,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:45,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687748112] [2023-04-03 02:31:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:45,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:46,313 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 02:31:46,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:46,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687748112] [2023-04-03 02:31:46,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687748112] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:46,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:46,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:31:46,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166988111] [2023-04-03 02:31:46,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:46,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:31:46,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:46,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:31:46,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:31:46,366 INFO L87 Difference]: Start difference. First operand has 432 states, 423 states have (on average 1.8557919621749408) internal successors, (785), 427 states have internal predecessors, (785), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:46,519 INFO L93 Difference]: Finished difference Result 648 states and 1132 transitions. [2023-04-03 02:31:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:31:46,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-03 02:31:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:46,540 INFO L225 Difference]: With dead ends: 648 [2023-04-03 02:31:46,540 INFO L226 Difference]: Without dead ends: 519 [2023-04-03 02:31:46,545 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 02:31:46,549 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 397 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:46,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1300 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:31:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-04-03 02:31:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 513. [2023-04-03 02:31:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 506 states have (on average 1.3122529644268774) internal successors, (664), 509 states have internal predecessors, (664), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:46,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 667 transitions. [2023-04-03 02:31:46,634 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 667 transitions. Word has length 53 [2023-04-03 02:31:46,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:46,635 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 667 transitions. [2023-04-03 02:31:46,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:46,635 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 667 transitions. [2023-04-03 02:31:46,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:31:46,637 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:46,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:31:46,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:31:46,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:46,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:46,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1181913160, now seen corresponding path program 1 times [2023-04-03 02:31:46,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:46,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998292299] [2023-04-03 02:31:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:46,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:46,895 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 02:31:46,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:46,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998292299] [2023-04-03 02:31:46,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998292299] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:46,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:46,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:31:46,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624913584] [2023-04-03 02:31:46,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:46,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:31:46,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:46,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:31:46,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:46,905 INFO L87 Difference]: Start difference. First operand 513 states and 667 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:47,311 INFO L93 Difference]: Finished difference Result 904 states and 1198 transitions. [2023-04-03 02:31:47,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:31:47,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-03 02:31:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:47,315 INFO L225 Difference]: With dead ends: 904 [2023-04-03 02:31:47,316 INFO L226 Difference]: Without dead ends: 603 [2023-04-03 02:31:47,319 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 02:31:47,320 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1575 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1575 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:47,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1575 Valid, 351 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:31:47,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-04-03 02:31:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 596. [2023-04-03 02:31:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 589 states have (on average 1.3089983022071308) internal successors, (771), 592 states have internal predecessors, (771), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:47,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 774 transitions. [2023-04-03 02:31:47,375 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 774 transitions. Word has length 53 [2023-04-03 02:31:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:47,376 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 774 transitions. [2023-04-03 02:31:47,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 774 transitions. [2023-04-03 02:31:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:31:47,380 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:47,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:31:47,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:31:47,380 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:47,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1075872229, now seen corresponding path program 1 times [2023-04-03 02:31:47,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:47,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129161289] [2023-04-03 02:31:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:47,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:47,468 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 02:31:47,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:47,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129161289] [2023-04-03 02:31:47,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129161289] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:47,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:47,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:31:47,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466767529] [2023-04-03 02:31:47,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:47,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:31:47,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:47,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:31:47,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:31:47,475 INFO L87 Difference]: Start difference. First operand 596 states and 774 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:47,641 INFO L93 Difference]: Finished difference Result 1049 states and 1419 transitions. [2023-04-03 02:31:47,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:31:47,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-03 02:31:47,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:47,645 INFO L225 Difference]: With dead ends: 1049 [2023-04-03 02:31:47,645 INFO L226 Difference]: Without dead ends: 817 [2023-04-03 02:31:47,646 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 02:31:47,647 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 262 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:47,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 797 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:31:47,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-04-03 02:31:47,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 810. [2023-04-03 02:31:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 803 states have (on average 1.3387297633872977) internal successors, (1075), 806 states have internal predecessors, (1075), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1078 transitions. [2023-04-03 02:31:47,704 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1078 transitions. Word has length 53 [2023-04-03 02:31:47,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:47,704 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1078 transitions. [2023-04-03 02:31:47,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:47,705 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1078 transitions. [2023-04-03 02:31:47,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:31:47,706 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:47,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:31:47,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:31:47,707 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:47,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:47,707 INFO L85 PathProgramCache]: Analyzing trace with hash -557475636, now seen corresponding path program 1 times [2023-04-03 02:31:47,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:47,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692663333] [2023-04-03 02:31:47,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:47,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:47,852 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 02:31:47,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:47,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692663333] [2023-04-03 02:31:47,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692663333] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:47,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:47,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:31:47,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914750824] [2023-04-03 02:31:47,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:47,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:31:47,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:47,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:31:47,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:47,854 INFO L87 Difference]: Start difference. First operand 810 states and 1078 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:48,228 INFO L93 Difference]: Finished difference Result 1764 states and 2419 transitions. [2023-04-03 02:31:48,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:31:48,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-03 02:31:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:48,233 INFO L225 Difference]: With dead ends: 1764 [2023-04-03 02:31:48,233 INFO L226 Difference]: Without dead ends: 1109 [2023-04-03 02:31:48,235 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 02:31:48,236 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 1401 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:48,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1401 Valid, 341 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:31:48,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2023-04-03 02:31:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1103. [2023-04-03 02:31:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1096 states have (on average 1.3713503649635037) internal successors, (1503), 1099 states have internal predecessors, (1503), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1506 transitions. [2023-04-03 02:31:48,371 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1506 transitions. Word has length 53 [2023-04-03 02:31:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:48,373 INFO L495 AbstractCegarLoop]: Abstraction has 1103 states and 1506 transitions. [2023-04-03 02:31:48,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1506 transitions. [2023-04-03 02:31:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:31:48,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:48,376 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 02:31:48,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:31:48,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:48,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:48,377 INFO L85 PathProgramCache]: Analyzing trace with hash 511774487, now seen corresponding path program 1 times [2023-04-03 02:31:48,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:48,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799116515] [2023-04-03 02:31:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:48,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:48,570 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 02:31:48,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:48,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799116515] [2023-04-03 02:31:48,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799116515] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:48,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:48,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:31:48,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857842337] [2023-04-03 02:31:48,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:48,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:31:48,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:48,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:31:48,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:48,579 INFO L87 Difference]: Start difference. First operand 1103 states and 1506 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:48,993 INFO L93 Difference]: Finished difference Result 2817 states and 3934 transitions. [2023-04-03 02:31:48,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:31:48,993 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 02:31:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:49,000 INFO L225 Difference]: With dead ends: 2817 [2023-04-03 02:31:49,001 INFO L226 Difference]: Without dead ends: 1804 [2023-04-03 02:31:49,003 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 02:31:49,004 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 1177 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:49,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1177 Valid, 309 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:31:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2023-04-03 02:31:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1798. [2023-04-03 02:31:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1791 states have (on average 1.379676158570631) internal successors, (2471), 1794 states have internal predecessors, (2471), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2474 transitions. [2023-04-03 02:31:49,253 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2474 transitions. Word has length 54 [2023-04-03 02:31:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:49,254 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 2474 transitions. [2023-04-03 02:31:49,254 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 02:31:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2474 transitions. [2023-04-03 02:31:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:31:49,256 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:49,256 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 02:31:49,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:31:49,256 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:49,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash -235024366, now seen corresponding path program 1 times [2023-04-03 02:31:49,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:49,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614066447] [2023-04-03 02:31:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:49,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:49,383 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 02:31:49,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:49,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614066447] [2023-04-03 02:31:49,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614066447] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:49,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:49,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:31:49,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540228950] [2023-04-03 02:31:49,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:49,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:31:49,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:49,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:31:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:31:49,386 INFO L87 Difference]: Start difference. First operand 1798 states and 2474 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:49,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:49,805 INFO L93 Difference]: Finished difference Result 4562 states and 6318 transitions. [2023-04-03 02:31:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:31:49,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-03 02:31:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:49,818 INFO L225 Difference]: With dead ends: 4562 [2023-04-03 02:31:49,818 INFO L226 Difference]: Without dead ends: 2934 [2023-04-03 02:31:49,821 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 02:31:49,822 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 247 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:49,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 665 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:31:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2023-04-03 02:31:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2928. [2023-04-03 02:31:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2921 states have (on average 1.3622047244094488) internal successors, (3979), 2924 states have internal predecessors, (3979), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 3982 transitions. [2023-04-03 02:31:50,143 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 3982 transitions. Word has length 55 [2023-04-03 02:31:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:50,143 INFO L495 AbstractCegarLoop]: Abstraction has 2928 states and 3982 transitions. [2023-04-03 02:31:50,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 3982 transitions. [2023-04-03 02:31:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:31:50,146 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:50,146 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 02:31:50,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:31:50,147 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:50,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash 902638482, now seen corresponding path program 1 times [2023-04-03 02:31:50,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:50,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149401776] [2023-04-03 02:31:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:50,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:50,311 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 02:31:50,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:50,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149401776] [2023-04-03 02:31:50,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149401776] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:50,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:50,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:31:50,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448678091] [2023-04-03 02:31:50,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:50,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:31:50,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:50,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:31:50,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:31:50,313 INFO L87 Difference]: Start difference. First operand 2928 states and 3982 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:51,882 INFO L93 Difference]: Finished difference Result 9739 states and 13408 transitions. [2023-04-03 02:31:51,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:31:51,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-03 02:31:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:51,919 INFO L225 Difference]: With dead ends: 9739 [2023-04-03 02:31:51,919 INFO L226 Difference]: Without dead ends: 8644 [2023-04-03 02:31:51,925 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 02:31:51,926 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 2286 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2286 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:51,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2286 Valid, 515 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:31:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8644 states. [2023-04-03 02:31:52,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8644 to 2942. [2023-04-03 02:31:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 2935 states have (on average 1.361839863713799) internal successors, (3997), 2938 states have internal predecessors, (3997), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:52,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 4000 transitions. [2023-04-03 02:31:52,457 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 4000 transitions. Word has length 56 [2023-04-03 02:31:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:52,458 INFO L495 AbstractCegarLoop]: Abstraction has 2942 states and 4000 transitions. [2023-04-03 02:31:52,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:52,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 4000 transitions. [2023-04-03 02:31:52,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:31:52,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:52,461 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 02:31:52,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:31:52,462 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:52,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1067316345, now seen corresponding path program 1 times [2023-04-03 02:31:52,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:52,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817751865] [2023-04-03 02:31:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:52,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:52,656 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 02:31:52,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:52,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817751865] [2023-04-03 02:31:52,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817751865] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:52,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:52,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:31:52,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590500657] [2023-04-03 02:31:52,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:52,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:31:52,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:52,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:31:52,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:31:52,658 INFO L87 Difference]: Start difference. First operand 2942 states and 4000 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:54,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:54,774 INFO L93 Difference]: Finished difference Result 10795 states and 14944 transitions. [2023-04-03 02:31:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:31:54,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-03 02:31:54,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:54,813 INFO L225 Difference]: With dead ends: 10795 [2023-04-03 02:31:54,814 INFO L226 Difference]: Without dead ends: 9855 [2023-04-03 02:31:54,820 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 02:31:54,821 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 1772 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:54,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1772 Valid, 607 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:31:54,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2023-04-03 02:31:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 2964. [2023-04-03 02:31:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2964 states, 2957 states have (on average 1.3621914102130537) internal successors, (4028), 2960 states have internal predecessors, (4028), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2964 states to 2964 states and 4031 transitions. [2023-04-03 02:31:55,426 INFO L78 Accepts]: Start accepts. Automaton has 2964 states and 4031 transitions. Word has length 56 [2023-04-03 02:31:55,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:55,427 INFO L495 AbstractCegarLoop]: Abstraction has 2964 states and 4031 transitions. [2023-04-03 02:31:55,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:55,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2964 states and 4031 transitions. [2023-04-03 02:31:55,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:31:55,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:55,430 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 02:31:55,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:31:55,430 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:55,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:55,431 INFO L85 PathProgramCache]: Analyzing trace with hash -269158967, now seen corresponding path program 1 times [2023-04-03 02:31:55,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:55,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49828936] [2023-04-03 02:31:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:55,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:55,625 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 02:31:55,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:55,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49828936] [2023-04-03 02:31:55,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49828936] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:55,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:55,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:31:55,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374404543] [2023-04-03 02:31:55,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:55,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:31:55,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:55,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:31:55,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:31:55,631 INFO L87 Difference]: Start difference. First operand 2964 states and 4031 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:58,104 INFO L93 Difference]: Finished difference Result 12806 states and 17757 transitions. [2023-04-03 02:31:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:31:58,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-03 02:31:58,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:58,134 INFO L225 Difference]: With dead ends: 12806 [2023-04-03 02:31:58,134 INFO L226 Difference]: Without dead ends: 11752 [2023-04-03 02:31:58,143 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 02:31:58,143 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 2602 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2602 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:58,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2602 Valid, 547 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:31:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11752 states. [2023-04-03 02:31:58,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11752 to 2998. [2023-04-03 02:31:58,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2991 states have (on average 1.3614175860916082) internal successors, (4072), 2994 states have internal predecessors, (4072), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 4075 transitions. [2023-04-03 02:31:58,782 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 4075 transitions. Word has length 56 [2023-04-03 02:31:58,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:58,782 INFO L495 AbstractCegarLoop]: Abstraction has 2998 states and 4075 transitions. [2023-04-03 02:31:58,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 4075 transitions. [2023-04-03 02:31:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:31:58,785 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:58,786 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 02:31:58,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:31:58,786 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:58,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:58,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1744464723, now seen corresponding path program 1 times [2023-04-03 02:31:58,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:58,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747541871] [2023-04-03 02:31:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:58,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:59,156 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 02:31:59,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:59,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747541871] [2023-04-03 02:31:59,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747541871] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:59,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:59,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:31:59,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622056214] [2023-04-03 02:31:59,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:59,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:31:59,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:31:59,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:31:59,159 INFO L87 Difference]: Start difference. First operand 2998 states and 4075 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:00,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:00,607 INFO L93 Difference]: Finished difference Result 7050 states and 9709 transitions. [2023-04-03 02:32:00,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 02:32:00,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-03 02:32:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:00,621 INFO L225 Difference]: With dead ends: 7050 [2023-04-03 02:32:00,621 INFO L226 Difference]: Without dead ends: 5018 [2023-04-03 02:32:00,627 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 02:32:00,628 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 1937 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1937 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:00,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1937 Valid, 732 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:32:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2023-04-03 02:32:01,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 2920. [2023-04-03 02:32:01,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2913 states have (on average 1.3601098523858566) internal successors, (3962), 2916 states have internal predecessors, (3962), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 3965 transitions. [2023-04-03 02:32:01,320 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 3965 transitions. Word has length 57 [2023-04-03 02:32:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:01,320 INFO L495 AbstractCegarLoop]: Abstraction has 2920 states and 3965 transitions. [2023-04-03 02:32:01,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:01,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 3965 transitions. [2023-04-03 02:32:01,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:32:01,323 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:01,323 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 02:32:01,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:32:01,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:01,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:01,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1364336384, now seen corresponding path program 1 times [2023-04-03 02:32:01,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:01,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348811720] [2023-04-03 02:32:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:01,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:01,635 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 02:32:01,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:01,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348811720] [2023-04-03 02:32:01,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348811720] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:01,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:01,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:32:01,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092439104] [2023-04-03 02:32:01,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:01,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:32:01,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:01,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:32:01,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:32:01,638 INFO L87 Difference]: Start difference. First operand 2920 states and 3965 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:04,525 INFO L93 Difference]: Finished difference Result 10791 states and 14878 transitions. [2023-04-03 02:32:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:32:04,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-03 02:32:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:04,548 INFO L225 Difference]: With dead ends: 10791 [2023-04-03 02:32:04,549 INFO L226 Difference]: Without dead ends: 8889 [2023-04-03 02:32:04,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:32:04,557 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 1386 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:04,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1386 Valid, 1385 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:32:04,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8889 states. [2023-04-03 02:32:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8889 to 2891. [2023-04-03 02:32:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2884 states have (on average 1.3595700416088765) internal successors, (3921), 2887 states have internal predecessors, (3921), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 3924 transitions. [2023-04-03 02:32:05,266 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 3924 transitions. Word has length 57 [2023-04-03 02:32:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:05,266 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 3924 transitions. [2023-04-03 02:32:05,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:05,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 3924 transitions. [2023-04-03 02:32:05,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:32:05,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:05,269 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 02:32:05,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:32:05,269 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:05,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:05,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1876570328, now seen corresponding path program 1 times [2023-04-03 02:32:05,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:05,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257993405] [2023-04-03 02:32:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:05,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:05,561 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 02:32:05,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:05,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257993405] [2023-04-03 02:32:05,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257993405] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:05,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:05,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:32:05,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983983628] [2023-04-03 02:32:05,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:05,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:32:05,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:05,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:32:05,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:32:05,563 INFO L87 Difference]: Start difference. First operand 2891 states and 3924 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:07,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:07,539 INFO L93 Difference]: Finished difference Result 6009 states and 8187 transitions. [2023-04-03 02:32:07,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:32:07,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-03 02:32:07,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:07,553 INFO L225 Difference]: With dead ends: 6009 [2023-04-03 02:32:07,553 INFO L226 Difference]: Without dead ends: 6004 [2023-04-03 02:32:07,555 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 02:32:07,556 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 1795 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:07,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1795 Valid, 1069 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:32:07,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6004 states. [2023-04-03 02:32:08,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6004 to 2891. [2023-04-03 02:32:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2884 states have (on average 1.358876560332871) internal successors, (3919), 2887 states have internal predecessors, (3919), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 3922 transitions. [2023-04-03 02:32:08,409 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 3922 transitions. Word has length 57 [2023-04-03 02:32:08,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:08,410 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 3922 transitions. [2023-04-03 02:32:08,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:08,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 3922 transitions. [2023-04-03 02:32:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:32:08,412 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:08,412 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 02:32:08,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:32:08,412 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:08,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:08,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1385910251, now seen corresponding path program 1 times [2023-04-03 02:32:08,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:08,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103719601] [2023-04-03 02:32:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:08,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:08,475 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 02:32:08,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:08,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103719601] [2023-04-03 02:32:08,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103719601] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:08,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:08,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:08,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102393297] [2023-04-03 02:32:08,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:08,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:08,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:08,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:08,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:08,477 INFO L87 Difference]: Start difference. First operand 2891 states and 3922 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:09,433 INFO L93 Difference]: Finished difference Result 3950 states and 5384 transitions. [2023-04-03 02:32:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:09,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-03 02:32:09,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:09,441 INFO L225 Difference]: With dead ends: 3950 [2023-04-03 02:32:09,441 INFO L226 Difference]: Without dead ends: 2898 [2023-04-03 02:32:09,444 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 02:32:09,445 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 180 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:09,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 673 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:09,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2023-04-03 02:32:10,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2891. [2023-04-03 02:32:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2884 states have (on average 1.3422330097087378) internal successors, (3871), 2887 states have internal predecessors, (3871), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 3874 transitions. [2023-04-03 02:32:10,307 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 3874 transitions. Word has length 58 [2023-04-03 02:32:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:10,308 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 3874 transitions. [2023-04-03 02:32:10,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 3874 transitions. [2023-04-03 02:32:10,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:32:10,311 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:10,311 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 02:32:10,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:32:10,311 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:10,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:10,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1495666947, now seen corresponding path program 1 times [2023-04-03 02:32:10,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:10,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357936844] [2023-04-03 02:32:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:10,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:10,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:10,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357936844] [2023-04-03 02:32:10,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357936844] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:10,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:10,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746388914] [2023-04-03 02:32:10,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:10,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:10,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:10,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:10,377 INFO L87 Difference]: Start difference. First operand 2891 states and 3874 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:11,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:11,308 INFO L93 Difference]: Finished difference Result 4011 states and 5400 transitions. [2023-04-03 02:32:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:11,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-03 02:32:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:11,315 INFO L225 Difference]: With dead ends: 4011 [2023-04-03 02:32:11,315 INFO L226 Difference]: Without dead ends: 2897 [2023-04-03 02:32:11,318 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 02:32:11,319 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 196 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:11,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 679 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:11,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2023-04-03 02:32:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2891. [2023-04-03 02:32:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2884 states have (on average 1.3269764216366158) internal successors, (3827), 2887 states have internal predecessors, (3827), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 3830 transitions. [2023-04-03 02:32:12,271 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 3830 transitions. Word has length 58 [2023-04-03 02:32:12,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:12,271 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 3830 transitions. [2023-04-03 02:32:12,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 3830 transitions. [2023-04-03 02:32:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:32:12,274 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:12,274 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 02:32:12,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:32:12,275 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:12,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash 958916556, now seen corresponding path program 1 times [2023-04-03 02:32:12,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:12,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214352244] [2023-04-03 02:32:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:12,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:12,345 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 02:32:12,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:12,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214352244] [2023-04-03 02:32:12,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214352244] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:12,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:12,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:12,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62762115] [2023-04-03 02:32:12,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:12,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:12,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:12,347 INFO L87 Difference]: Start difference. First operand 2891 states and 3830 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:13,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:13,243 INFO L93 Difference]: Finished difference Result 4040 states and 5383 transitions. [2023-04-03 02:32:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:13,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-03 02:32:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:13,249 INFO L225 Difference]: With dead ends: 4040 [2023-04-03 02:32:13,250 INFO L226 Difference]: Without dead ends: 2882 [2023-04-03 02:32:13,253 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 02:32:13,254 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 216 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:13,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 699 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:13,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2023-04-03 02:32:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2876. [2023-04-03 02:32:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2869 states have (on average 1.3067270826071802) internal successors, (3749), 2872 states have internal predecessors, (3749), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 3752 transitions. [2023-04-03 02:32:14,096 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 3752 transitions. Word has length 58 [2023-04-03 02:32:14,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:14,096 INFO L495 AbstractCegarLoop]: Abstraction has 2876 states and 3752 transitions. [2023-04-03 02:32:14,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 3752 transitions. [2023-04-03 02:32:14,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:32:14,100 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:14,100 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 02:32:14,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:32:14,100 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:14,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:14,101 INFO L85 PathProgramCache]: Analyzing trace with hash -172349180, now seen corresponding path program 1 times [2023-04-03 02:32:14,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:14,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476264991] [2023-04-03 02:32:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:14,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:14,152 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 02:32:14,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:14,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476264991] [2023-04-03 02:32:14,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476264991] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:14,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:14,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:14,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592877526] [2023-04-03 02:32:14,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:14,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:14,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:14,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:14,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:14,154 INFO L87 Difference]: Start difference. First operand 2876 states and 3752 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:15,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:15,036 INFO L93 Difference]: Finished difference Result 4523 states and 5951 transitions. [2023-04-03 02:32:15,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:15,036 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 02:32:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:15,041 INFO L225 Difference]: With dead ends: 4523 [2023-04-03 02:32:15,041 INFO L226 Difference]: Without dead ends: 3222 [2023-04-03 02:32:15,045 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 02:32:15,046 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 284 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:15,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 481 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:15,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2023-04-03 02:32:15,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 2666. [2023-04-03 02:32:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2659 states have (on average 1.305377961639714) internal successors, (3471), 2662 states have internal predecessors, (3471), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 3474 transitions. [2023-04-03 02:32:15,740 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 3474 transitions. Word has length 59 [2023-04-03 02:32:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:15,740 INFO L495 AbstractCegarLoop]: Abstraction has 2666 states and 3474 transitions. [2023-04-03 02:32:15,740 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 02:32:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 3474 transitions. [2023-04-03 02:32:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:32:15,742 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:15,742 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 02:32:15,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:32:15,743 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:15,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:15,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1005451477, now seen corresponding path program 1 times [2023-04-03 02:32:15,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:15,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189300696] [2023-04-03 02:32:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:15,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:16,376 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 02:32:16,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:16,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189300696] [2023-04-03 02:32:16,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189300696] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:16,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:16,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:32:16,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852157353] [2023-04-03 02:32:16,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:16,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:32:16,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:16,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:32:16,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:32:16,379 INFO L87 Difference]: Start difference. First operand 2666 states and 3474 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:18,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:18,405 INFO L93 Difference]: Finished difference Result 4161 states and 5441 transitions. [2023-04-03 02:32:18,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-03 02:32:18,405 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-03 02:32:18,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:18,410 INFO L225 Difference]: With dead ends: 4161 [2023-04-03 02:32:18,410 INFO L226 Difference]: Without dead ends: 4157 [2023-04-03 02:32:18,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:32:18,411 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 1975 mSDsluCounter, 2396 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 2874 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:18,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1975 Valid, 2874 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:32:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2023-04-03 02:32:19,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 2662. [2023-04-03 02:32:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2656 states have (on average 1.3049698795180722) internal successors, (3466), 2658 states have internal predecessors, (3466), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3469 transitions. [2023-04-03 02:32:19,140 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3469 transitions. Word has length 60 [2023-04-03 02:32:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:19,140 INFO L495 AbstractCegarLoop]: Abstraction has 2662 states and 3469 transitions. [2023-04-03 02:32:19,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3469 transitions. [2023-04-03 02:32:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:32:19,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:19,143 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 02:32:19,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:32:19,143 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:19,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:19,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1468288075, now seen corresponding path program 1 times [2023-04-03 02:32:19,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:19,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806357220] [2023-04-03 02:32:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:19,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:19,661 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 02:32:19,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:19,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806357220] [2023-04-03 02:32:19,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806357220] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:19,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:19,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-03 02:32:19,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606904650] [2023-04-03 02:32:19,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:19,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-03 02:32:19,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:19,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-03 02:32:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-03 02:32:19,664 INFO L87 Difference]: Start difference. First operand 2662 states and 3469 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:21,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:21,683 INFO L93 Difference]: Finished difference Result 4420 states and 5794 transitions. [2023-04-03 02:32:21,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 02:32:21,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-03 02:32:21,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:21,688 INFO L225 Difference]: With dead ends: 4420 [2023-04-03 02:32:21,688 INFO L226 Difference]: Without dead ends: 3922 [2023-04-03 02:32:21,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:32:21,691 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 1842 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1842 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:21,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1842 Valid, 1597 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:32:21,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3922 states. [2023-04-03 02:32:22,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3922 to 2604. [2023-04-03 02:32:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2599 states have (on average 1.305886879569065) internal successors, (3394), 2600 states have internal predecessors, (3394), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 3397 transitions. [2023-04-03 02:32:22,534 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 3397 transitions. Word has length 60 [2023-04-03 02:32:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:22,534 INFO L495 AbstractCegarLoop]: Abstraction has 2604 states and 3397 transitions. [2023-04-03 02:32:22,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 3397 transitions. [2023-04-03 02:32:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:32:22,536 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:22,536 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 02:32:22,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:32:22,537 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:22,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:22,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2011747672, now seen corresponding path program 1 times [2023-04-03 02:32:22,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:22,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814579493] [2023-04-03 02:32:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:22,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:22,603 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 02:32:22,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:22,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814579493] [2023-04-03 02:32:22,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814579493] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:22,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:22,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:22,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420824012] [2023-04-03 02:32:22,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:22,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:22,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:22,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:22,605 INFO L87 Difference]: Start difference. First operand 2604 states and 3397 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:24,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:24,022 INFO L93 Difference]: Finished difference Result 4359 states and 5705 transitions. [2023-04-03 02:32:24,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:24,022 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 02:32:24,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:24,025 INFO L225 Difference]: With dead ends: 4359 [2023-04-03 02:32:24,025 INFO L226 Difference]: Without dead ends: 2998 [2023-04-03 02:32:24,027 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 02:32:24,027 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 215 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:24,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 342 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:32:24,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2023-04-03 02:32:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2447. [2023-04-03 02:32:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2443 states have (on average 1.3057715923045436) internal successors, (3190), 2443 states have internal predecessors, (3190), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3193 transitions. [2023-04-03 02:32:24,845 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3193 transitions. Word has length 60 [2023-04-03 02:32:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:24,845 INFO L495 AbstractCegarLoop]: Abstraction has 2447 states and 3193 transitions. [2023-04-03 02:32:24,845 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 02:32:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3193 transitions. [2023-04-03 02:32:24,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:32:24,848 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:24,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:32:24,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:32:24,849 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:24,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:24,849 INFO L85 PathProgramCache]: Analyzing trace with hash 876443249, now seen corresponding path program 1 times [2023-04-03 02:32:24,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:24,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810215311] [2023-04-03 02:32:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:24,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:24,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:24,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810215311] [2023-04-03 02:32:24,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810215311] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:24,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:24,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:32:24,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208009317] [2023-04-03 02:32:24,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:24,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:32:24,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:32:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:32:24,960 INFO L87 Difference]: Start difference. First operand 2447 states and 3193 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:26,098 INFO L93 Difference]: Finished difference Result 2453 states and 3196 transitions. [2023-04-03 02:32:26,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:32:26,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-03 02:32:26,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:26,101 INFO L225 Difference]: With dead ends: 2453 [2023-04-03 02:32:26,101 INFO L226 Difference]: Without dead ends: 2126 [2023-04-03 02:32:26,102 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 02:32:26,103 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 442 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:26,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 670 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:32:26,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2023-04-03 02:32:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 2122. [2023-04-03 02:32:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2118 states have (on average 1.3031161473087818) internal successors, (2760), 2118 states have internal predecessors, (2760), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 2763 transitions. [2023-04-03 02:32:26,898 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 2763 transitions. Word has length 60 [2023-04-03 02:32:26,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:26,898 INFO L495 AbstractCegarLoop]: Abstraction has 2122 states and 2763 transitions. [2023-04-03 02:32:26,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 2763 transitions. [2023-04-03 02:32:26,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-03 02:32:26,901 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:26,901 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 02:32:26,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:32:26,901 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:26,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:26,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1569536683, now seen corresponding path program 1 times [2023-04-03 02:32:26,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:26,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375050373] [2023-04-03 02:32:26,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:26,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:27,047 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 02:32:27,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:27,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375050373] [2023-04-03 02:32:27,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375050373] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:27,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:27,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:27,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950538782] [2023-04-03 02:32:27,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:27,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:27,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:27,049 INFO L87 Difference]: Start difference. First operand 2122 states and 2763 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:28,226 INFO L93 Difference]: Finished difference Result 3894 states and 5173 transitions. [2023-04-03 02:32:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:28,227 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 02:32:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:28,230 INFO L225 Difference]: With dead ends: 3894 [2023-04-03 02:32:28,230 INFO L226 Difference]: Without dead ends: 2876 [2023-04-03 02:32:28,231 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 02:32:28,232 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 113 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:28,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 470 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2023-04-03 02:32:29,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2682. [2023-04-03 02:32:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2678 states have (on average 1.2976101568334577) internal successors, (3475), 2678 states have internal predecessors, (3475), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 3478 transitions. [2023-04-03 02:32:29,221 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 3478 transitions. Word has length 61 [2023-04-03 02:32:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:29,221 INFO L495 AbstractCegarLoop]: Abstraction has 2682 states and 3478 transitions. [2023-04-03 02:32:29,221 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 02:32:29,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 3478 transitions. [2023-04-03 02:32:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 02:32:29,223 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:29,223 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 02:32:29,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-03 02:32:29,224 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:29,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:29,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1583937969, now seen corresponding path program 1 times [2023-04-03 02:32:29,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:29,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867000763] [2023-04-03 02:32:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:29,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:29,334 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 02:32:29,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:29,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867000763] [2023-04-03 02:32:29,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867000763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:29,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:29,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:29,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648082905] [2023-04-03 02:32:29,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:29,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:29,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:29,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:29,336 INFO L87 Difference]: Start difference. First operand 2682 states and 3478 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:30,880 INFO L93 Difference]: Finished difference Result 5296 states and 7007 transitions. [2023-04-03 02:32:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:30,881 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 02:32:30,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:30,886 INFO L225 Difference]: With dead ends: 5296 [2023-04-03 02:32:30,886 INFO L226 Difference]: Without dead ends: 3858 [2023-04-03 02:32:30,888 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 02:32:30,888 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 101 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:30,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 458 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3858 states. [2023-04-03 02:32:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3858 to 3448. [2023-04-03 02:32:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3444 states have (on average 1.2944250871080138) internal successors, (4458), 3444 states have internal predecessors, (4458), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:32,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 4461 transitions. [2023-04-03 02:32:32,246 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 4461 transitions. Word has length 64 [2023-04-03 02:32:32,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:32,247 INFO L495 AbstractCegarLoop]: Abstraction has 3448 states and 4461 transitions. [2023-04-03 02:32:32,247 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 02:32:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 4461 transitions. [2023-04-03 02:32:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-03 02:32:32,249 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:32,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:32:32,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:32:32,250 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:32,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:32,250 INFO L85 PathProgramCache]: Analyzing trace with hash 138520932, now seen corresponding path program 1 times [2023-04-03 02:32:32,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:32,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381893322] [2023-04-03 02:32:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:32,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:32,354 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 02:32:32,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:32,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381893322] [2023-04-03 02:32:32,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381893322] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:32,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:32,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:32,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136619050] [2023-04-03 02:32:32,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:32,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:32,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:32,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:32,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:32,358 INFO L87 Difference]: Start difference. First operand 3448 states and 4461 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 02:32:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:34,574 INFO L93 Difference]: Finished difference Result 7090 states and 9335 transitions. [2023-04-03 02:32:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:34,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 68 [2023-04-03 02:32:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:34,581 INFO L225 Difference]: With dead ends: 7090 [2023-04-03 02:32:34,581 INFO L226 Difference]: Without dead ends: 5162 [2023-04-03 02:32:34,583 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 02:32:34,584 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 79 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:34,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 448 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2023-04-03 02:32:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 4640. [2023-04-03 02:32:36,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4640 states, 4636 states have (on average 1.2896893874029336) internal successors, (5979), 4636 states have internal predecessors, (5979), 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 02:32:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 5982 transitions. [2023-04-03 02:32:36,496 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 5982 transitions. Word has length 68 [2023-04-03 02:32:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:36,497 INFO L495 AbstractCegarLoop]: Abstraction has 4640 states and 5982 transitions. [2023-04-03 02:32:36,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 02:32:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 5982 transitions. [2023-04-03 02:32:36,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:32:36,499 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:36,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:32:36,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-03 02:32:36,500 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:36,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:36,500 INFO L85 PathProgramCache]: Analyzing trace with hash -663265697, now seen corresponding path program 1 times [2023-04-03 02:32:36,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:36,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116283765] [2023-04-03 02:32:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:36,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:36,880 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 02:32:36,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:36,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116283765] [2023-04-03 02:32:36,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116283765] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:36,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:36,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:32:36,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645680090] [2023-04-03 02:32:36,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:36,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:32:36,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:36,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:32:36,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:32:36,882 INFO L87 Difference]: Start difference. First operand 4640 states and 5982 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 02:32:41,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:41,517 INFO L93 Difference]: Finished difference Result 9806 states and 12710 transitions. [2023-04-03 02:32:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:32:41,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 72 [2023-04-03 02:32:41,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:41,529 INFO L225 Difference]: With dead ends: 9806 [2023-04-03 02:32:41,529 INFO L226 Difference]: Without dead ends: 9804 [2023-04-03 02:32:41,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:32:41,531 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1183 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:41,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1183 Valid, 1680 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:32:41,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9804 states. [2023-04-03 02:32:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9804 to 5692. [2023-04-03 02:32:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5688 states have (on average 1.284985935302391) internal successors, (7309), 5688 states have internal predecessors, (7309), 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 02:32:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 7312 transitions. [2023-04-03 02:32:44,135 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 7312 transitions. Word has length 72 [2023-04-03 02:32:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:44,136 INFO L495 AbstractCegarLoop]: Abstraction has 5692 states and 7312 transitions. [2023-04-03 02:32:44,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 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 02:32:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 7312 transitions. [2023-04-03 02:32:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:32:44,139 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:44,139 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 02:32:44,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-03 02:32:44,140 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:44,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2118545944, now seen corresponding path program 1 times [2023-04-03 02:32:44,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:44,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649436757] [2023-04-03 02:32:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:44,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:44,273 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 02:32:44,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:44,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649436757] [2023-04-03 02:32:44,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649436757] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:44,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:44,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:32:44,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183195079] [2023-04-03 02:32:44,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:44,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:32:44,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:44,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:32:44,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:32:44,276 INFO L87 Difference]: Start difference. First operand 5692 states and 7312 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 02:32:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:52,172 INFO L93 Difference]: Finished difference Result 17126 states and 22108 transitions. [2023-04-03 02:32:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:32:52,173 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 75 [2023-04-03 02:32:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:52,190 INFO L225 Difference]: With dead ends: 17126 [2023-04-03 02:32:52,190 INFO L226 Difference]: Without dead ends: 15486 [2023-04-03 02:32:52,193 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 02:32:52,194 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1820 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:52,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1820 Valid, 436 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:32:52,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15486 states. [2023-04-03 02:32:54,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15486 to 5754. [2023-04-03 02:32:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5754 states, 5750 states have (on average 1.2836521739130435) internal successors, (7381), 5750 states have internal predecessors, (7381), 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 02:32:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 7384 transitions. [2023-04-03 02:32:54,982 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 7384 transitions. Word has length 75 [2023-04-03 02:32:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:54,983 INFO L495 AbstractCegarLoop]: Abstraction has 5754 states and 7384 transitions. [2023-04-03 02:32:54,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 02:32:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 7384 transitions. [2023-04-03 02:32:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:32:54,987 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:54,987 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] [2023-04-03 02:32:54,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-03 02:32:54,989 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:54,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:54,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1840526590, now seen corresponding path program 1 times [2023-04-03 02:32:54,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:54,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119793117] [2023-04-03 02:32:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:54,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:55,373 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 02:32:55,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:55,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119793117] [2023-04-03 02:32:55,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119793117] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:55,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:55,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:32:55,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488352127] [2023-04-03 02:32:55,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:55,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:32:55,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:55,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:32:55,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:32:55,376 INFO L87 Difference]: Start difference. First operand 5754 states and 7384 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:00,285 INFO L93 Difference]: Finished difference Result 9738 states and 12626 transitions. [2023-04-03 02:33:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-03 02:33:00,286 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 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 77 [2023-04-03 02:33:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:00,295 INFO L225 Difference]: With dead ends: 9738 [2023-04-03 02:33:00,296 INFO L226 Difference]: Without dead ends: 9736 [2023-04-03 02:33:00,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:33:00,297 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 882 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:00,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 1748 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:33:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9736 states. [2023-04-03 02:33:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9736 to 6226. [2023-04-03 02:33:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6222 states have (on average 1.2820636451301832) internal successors, (7977), 6222 states have internal predecessors, (7977), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 7980 transitions. [2023-04-03 02:33:03,346 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 7980 transitions. Word has length 77 [2023-04-03 02:33:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:03,346 INFO L495 AbstractCegarLoop]: Abstraction has 6226 states and 7980 transitions. [2023-04-03 02:33:03,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 7980 transitions. [2023-04-03 02:33:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:33:03,350 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:03,350 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 02:33:03,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-03 02:33:03,350 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:03,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:03,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1754635083, now seen corresponding path program 1 times [2023-04-03 02:33:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:03,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296748785] [2023-04-03 02:33:03,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:03,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:03,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:03,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296748785] [2023-04-03 02:33:03,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296748785] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:03,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:03,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:33:03,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604333144] [2023-04-03 02:33:03,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:03,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:33:03,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:03,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:33:03,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:33:03,407 INFO L87 Difference]: Start difference. First operand 6226 states and 7980 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:06,774 INFO L93 Difference]: Finished difference Result 9244 states and 11879 transitions. [2023-04-03 02:33:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:33:06,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 78 [2023-04-03 02:33:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:06,782 INFO L225 Difference]: With dead ends: 9244 [2023-04-03 02:33:06,782 INFO L226 Difference]: Without dead ends: 6554 [2023-04-03 02:33:06,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:33:06,785 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 184 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:06,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 302 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:33:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6554 states. [2023-04-03 02:33:09,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6554 to 5810. [2023-04-03 02:33:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5810 states, 5806 states have (on average 1.277643816741302) internal successors, (7418), 5806 states have internal predecessors, (7418), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5810 states to 5810 states and 7421 transitions. [2023-04-03 02:33:09,666 INFO L78 Accepts]: Start accepts. Automaton has 5810 states and 7421 transitions. Word has length 78 [2023-04-03 02:33:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:09,666 INFO L495 AbstractCegarLoop]: Abstraction has 5810 states and 7421 transitions. [2023-04-03 02:33:09,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:09,666 INFO L276 IsEmpty]: Start isEmpty. Operand 5810 states and 7421 transitions. [2023-04-03 02:33:09,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:33:09,668 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:09,668 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 02:33:09,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-04-03 02:33:09,668 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:09,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:09,669 INFO L85 PathProgramCache]: Analyzing trace with hash 808388, now seen corresponding path program 1 times [2023-04-03 02:33:09,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:09,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970123400] [2023-04-03 02:33:09,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:09,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:09,983 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 02:33:09,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:09,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970123400] [2023-04-03 02:33:09,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970123400] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:09,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:09,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:33:09,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39522417] [2023-04-03 02:33:09,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:09,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:33:09,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:09,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:33:09,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:33:09,984 INFO L87 Difference]: Start difference. First operand 5810 states and 7421 transitions. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:14,847 INFO L93 Difference]: Finished difference Result 9208 states and 11888 transitions. [2023-04-03 02:33:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-03 02:33:14,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 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 78 [2023-04-03 02:33:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:14,859 INFO L225 Difference]: With dead ends: 9208 [2023-04-03 02:33:14,859 INFO L226 Difference]: Without dead ends: 9206 [2023-04-03 02:33:14,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:33:14,862 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 823 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:14,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 1517 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:33:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9206 states. [2023-04-03 02:33:17,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9206 to 6066. [2023-04-03 02:33:17,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6066 states, 6062 states have (on average 1.2769712966017817) internal successors, (7741), 6062 states have internal predecessors, (7741), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:17,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6066 states to 6066 states and 7744 transitions. [2023-04-03 02:33:17,922 INFO L78 Accepts]: Start accepts. Automaton has 6066 states and 7744 transitions. Word has length 78 [2023-04-03 02:33:17,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:17,922 INFO L495 AbstractCegarLoop]: Abstraction has 6066 states and 7744 transitions. [2023-04-03 02:33:17,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 6066 states and 7744 transitions. [2023-04-03 02:33:17,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:33:17,924 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:17,925 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] [2023-04-03 02:33:17,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-04-03 02:33:17,925 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:17,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:17,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1901988792, now seen corresponding path program 1 times [2023-04-03 02:33:17,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:17,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835411022] [2023-04-03 02:33:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:17,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:18,206 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 02:33:18,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:18,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835411022] [2023-04-03 02:33:18,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835411022] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:18,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:18,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-03 02:33:18,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756286759] [2023-04-03 02:33:18,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:18,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:33:18,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:18,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:33:18,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-03 02:33:18,209 INFO L87 Difference]: Start difference. First operand 6066 states and 7744 transitions. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:25,994 INFO L93 Difference]: Finished difference Result 16213 states and 20765 transitions. [2023-04-03 02:33:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:33:25,995 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 states have internal predecessors, (73), 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 80 [2023-04-03 02:33:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:26,012 INFO L225 Difference]: With dead ends: 16213 [2023-04-03 02:33:26,012 INFO L226 Difference]: Without dead ends: 13387 [2023-04-03 02:33:26,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:33:26,018 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 998 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:26,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 1005 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:33:26,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13387 states. [2023-04-03 02:33:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13387 to 5948. [2023-04-03 02:33:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5948 states, 5944 states have (on average 1.2789367429340512) internal successors, (7602), 5944 states have internal predecessors, (7602), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5948 states to 5948 states and 7605 transitions. [2023-04-03 02:33:29,158 INFO L78 Accepts]: Start accepts. Automaton has 5948 states and 7605 transitions. Word has length 80 [2023-04-03 02:33:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:29,158 INFO L495 AbstractCegarLoop]: Abstraction has 5948 states and 7605 transitions. [2023-04-03 02:33:29,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 5948 states and 7605 transitions. [2023-04-03 02:33:29,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:33:29,161 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:29,161 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] [2023-04-03 02:33:29,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-04-03 02:33:29,162 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:29,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:29,162 INFO L85 PathProgramCache]: Analyzing trace with hash -729436811, now seen corresponding path program 1 times [2023-04-03 02:33:29,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:29,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242743194] [2023-04-03 02:33:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:29,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:30,049 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 02:33:30,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:30,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242743194] [2023-04-03 02:33:30,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242743194] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:33:30,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245908528] [2023-04-03 02:33:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:30,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:33:30,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:33:30,063 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 02:33:30,065 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 02:33:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:30,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-03 02:33:30,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:33:30,715 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 02:33:30,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:33:30,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245908528] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:30,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:33:30,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2023-04-03 02:33:30,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226473064] [2023-04-03 02:33:30,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:30,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-03 02:33:30,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:30,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-03 02:33:30,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:33:30,718 INFO L87 Difference]: Start difference. First operand 5948 states and 7605 transitions. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:36,914 INFO L93 Difference]: Finished difference Result 12185 states and 15712 transitions. [2023-04-03 02:33:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 02:33:36,915 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 states have internal predecessors, (73), 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 80 [2023-04-03 02:33:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:36,926 INFO L225 Difference]: With dead ends: 12185 [2023-04-03 02:33:36,926 INFO L226 Difference]: Without dead ends: 9765 [2023-04-03 02:33:36,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:33:36,930 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 784 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:36,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 814 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:33:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9765 states. [2023-04-03 02:33:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9765 to 5922. [2023-04-03 02:33:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5922 states, 5918 states have (on average 1.278810408921933) internal successors, (7568), 5918 states have internal predecessors, (7568), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5922 states to 5922 states and 7571 transitions. [2023-04-03 02:33:40,161 INFO L78 Accepts]: Start accepts. Automaton has 5922 states and 7571 transitions. Word has length 80 [2023-04-03 02:33:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:40,161 INFO L495 AbstractCegarLoop]: Abstraction has 5922 states and 7571 transitions. [2023-04-03 02:33:40,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 8 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:40,161 INFO L276 IsEmpty]: Start isEmpty. Operand 5922 states and 7571 transitions. [2023-04-03 02:33:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-03 02:33:40,163 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:40,163 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] [2023-04-03 02:33:40,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-03 02:33:40,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:33:40,364 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:40,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:40,365 INFO L85 PathProgramCache]: Analyzing trace with hash 534120599, now seen corresponding path program 1 times [2023-04-03 02:33:40,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:40,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771348625] [2023-04-03 02:33:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:40,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:41,157 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 02:33:41,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:41,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771348625] [2023-04-03 02:33:41,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771348625] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:33:41,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935467648] [2023-04-03 02:33:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:41,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:33:41,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:33:41,161 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 02:33:41,165 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 02:33:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:41,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-03 02:33:41,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:33:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:33:42,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:33:42,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935467648] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:42,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:33:42,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 30 [2023-04-03 02:33:42,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598688266] [2023-04-03 02:33:42,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:42,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-03 02:33:42,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:42,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-03 02:33:42,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2023-04-03 02:33:42,414 INFO L87 Difference]: Start difference. First operand 5922 states and 7571 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 15 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 02:33:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:48,311 INFO L93 Difference]: Finished difference Result 8858 states and 11407 transitions. [2023-04-03 02:33:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:33:48,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 15 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 81 [2023-04-03 02:33:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:48,320 INFO L225 Difference]: With dead ends: 8858 [2023-04-03 02:33:48,320 INFO L226 Difference]: Without dead ends: 7533 [2023-04-03 02:33:48,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2023-04-03 02:33:48,323 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 1752 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1752 SdHoareTripleChecker+Valid, 1812 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:48,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1752 Valid, 1812 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:33:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7533 states. [2023-04-03 02:33:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7533 to 6253. [2023-04-03 02:33:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6253 states, 6249 states have (on average 1.2766842694831173) internal successors, (7978), 6249 states have internal predecessors, (7978), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6253 states to 6253 states and 7981 transitions. [2023-04-03 02:33:51,866 INFO L78 Accepts]: Start accepts. Automaton has 6253 states and 7981 transitions. Word has length 81 [2023-04-03 02:33:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:51,866 INFO L495 AbstractCegarLoop]: Abstraction has 6253 states and 7981 transitions. [2023-04-03 02:33:51,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 15 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 02:33:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 6253 states and 7981 transitions. [2023-04-03 02:33:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-03 02:33:51,869 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:51,869 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] [2023-04-03 02:33:51,877 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 02:33:52,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-04-03 02:33:52,070 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:52,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:52,070 INFO L85 PathProgramCache]: Analyzing trace with hash -121921239, now seen corresponding path program 1 times [2023-04-03 02:33:52,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:52,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7514017] [2023-04-03 02:33:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:52,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:52,880 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 02:33:52,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:52,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7514017] [2023-04-03 02:33:52,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7514017] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:33:52,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978280717] [2023-04-03 02:33:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:52,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:33:52,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:33:52,882 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 02:33:52,883 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 02:33:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:53,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-03 02:33:53,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:33:53,610 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 02:33:53,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:33:53,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978280717] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:53,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:33:53,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 25 [2023-04-03 02:33:53,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155104478] [2023-04-03 02:33:53,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:53,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:33:53,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:53,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:33:53,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:33:53,612 INFO L87 Difference]: Start difference. First operand 6253 states and 7981 transitions. Second operand has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 11 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:58,966 INFO L93 Difference]: Finished difference Result 9580 states and 12292 transitions. [2023-04-03 02:33:58,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:33:58,966 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 11 states have internal predecessors, (74), 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 02:33:58,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:58,976 INFO L225 Difference]: With dead ends: 9580 [2023-04-03 02:33:58,976 INFO L226 Difference]: Without dead ends: 8380 [2023-04-03 02:33:58,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2023-04-03 02:33:58,978 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 1927 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1927 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:58,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1927 Valid, 1315 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:33:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8380 states. [2023-04-03 02:34:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8380 to 6327. [2023-04-03 02:34:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6327 states, 6323 states have (on average 1.2769255100427013) internal successors, (8074), 6323 states have internal predecessors, (8074), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:34:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6327 states to 6327 states and 8077 transitions. [2023-04-03 02:34:02,657 INFO L78 Accepts]: Start accepts. Automaton has 6327 states and 8077 transitions. Word has length 81 [2023-04-03 02:34:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:34:02,658 INFO L495 AbstractCegarLoop]: Abstraction has 6327 states and 8077 transitions. [2023-04-03 02:34:02,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 11 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:34:02,658 INFO L276 IsEmpty]: Start isEmpty. Operand 6327 states and 8077 transitions. [2023-04-03 02:34:02,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-03 02:34:02,659 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:34:02,660 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] [2023-04-03 02:34:02,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 02:34:02,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:34:02,861 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:34:02,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:34:02,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1513950332, now seen corresponding path program 1 times [2023-04-03 02:34:02,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:34:02,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306559815] [2023-04-03 02:34:02,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:02,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:34:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:03,708 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 02:34:03,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:34:03,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306559815] [2023-04-03 02:34:03,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306559815] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:34:03,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505495423] [2023-04-03 02:34:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:34:03,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:34:03,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:34:03,710 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:34:03,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 02:34:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:34:03,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 47 conjunts are in the unsatisfiable core [2023-04-03 02:34:03,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:34:05,349 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 02:34:05,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:34:09,922 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 02:34:09,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505495423] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:34:09,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259084191] [2023-04-03 02:34:09,944 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2023-04-03 02:34:09,944 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:34:09,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:34:09,950 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:34:09,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:34:12,698 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 340 for LOIs [2023-04-03 02:34:29,356 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7