/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.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 03:04:33,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 03:04:33,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 03:04:33,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 03:04:33,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 03:04:33,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 03:04:33,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 03:04:33,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 03:04:33,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 03:04:33,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 03:04:33,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 03:04:33,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 03:04:33,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 03:04:33,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 03:04:33,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 03:04:33,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 03:04:33,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 03:04:33,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 03:04:33,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 03:04:33,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 03:04:33,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 03:04:33,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 03:04:33,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 03:04:33,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 03:04:33,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 03:04:33,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 03:04:33,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 03:04:33,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 03:04:33,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 03:04:33,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 03:04:33,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 03:04:33,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 03:04:33,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 03:04:33,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 03:04:33,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 03:04:33,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 03:04:33,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 03:04:33,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 03:04:33,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 03:04:33,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 03:04:33,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 03:04:33,612 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 03:04:33,642 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 03:04:33,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 03:04:33,643 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 03:04:33,643 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 03:04:33,644 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 03:04:33,644 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 03:04:33,644 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 03:04:33,644 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 03:04:33,644 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 03:04:33,644 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 03:04:33,645 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 03:04:33,645 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 03:04:33,645 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 03:04:33,645 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 03:04:33,646 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 03:04:33,646 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 03:04:33,646 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 03:04:33,646 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 03:04:33,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 03:04:33,647 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 03:04:33,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 03:04:33,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 03:04:33,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 03:04:33,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 03:04:33,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 03:04:33,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 03:04:33,648 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 03:04:33,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 03:04:33,648 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 03:04:33,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 03:04:33,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 03:04:33,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 03:04:33,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:04:33,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 03:04:33,649 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 03:04:33,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 03:04:33,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 03:04:33,650 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 03:04:33,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 03:04:33,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 03:04:33,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 03:04:33,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 03:04:33,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 03:04:33,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 03:04:33,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 03:04:33,920 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 03:04:33,921 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 03:04:33,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-03 03:04:35,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 03:04:35,256 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 03:04:35,256 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-03 03:04:35,269 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6984de2c6/86d210bee7aa4f1587b3d7c1e1378dc4/FLAG4ea4dc8df [2023-04-03 03:04:35,279 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6984de2c6/86d210bee7aa4f1587b3d7c1e1378dc4 [2023-04-03 03:04:35,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 03:04:35,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 03:04:35,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 03:04:35,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 03:04:35,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 03:04:35,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:04:35" (1/1) ... [2023-04-03 03:04:35,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26053920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:04:35, skipping insertion in model container [2023-04-03 03:04:35,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:04:35" (1/1) ... [2023-04-03 03:04:35,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 03:04:35,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 03:04:35,505 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.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[5771,5784] [2023-04-03 03:04:35,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:04:35,557 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 03:04:35,587 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.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[5771,5784] [2023-04-03 03:04:35,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:04:35,626 INFO L208 MainTranslator]: Completed translation [2023-04-03 03:04:35,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:04:35 WrapperNode [2023-04-03 03:04:35,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 03:04:35,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 03:04:35,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 03:04:35,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 03:04:35,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:04:35" (1/1) ... [2023-04-03 03:04:35,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:04:35" (1/1) ... [2023-04-03 03:04:35,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:04:35" (1/1) ... [2023-04-03 03:04:35,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:04:35" (1/1) ... [2023-04-03 03:04:35,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:04:35" (1/1) ... [2023-04-03 03:04:35,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:04:35" (1/1) ... [2023-04-03 03:04:35,677 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:04:35" (1/1) ... [2023-04-03 03:04:35,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:04:35" (1/1) ... [2023-04-03 03:04:35,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 03:04:35,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 03:04:35,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 03:04:35,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 03:04:35,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:04:35" (1/1) ... [2023-04-03 03:04:35,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:04:35,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:04:35,707 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 03:04:35,717 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 03:04:35,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 03:04:35,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 03:04:35,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 03:04:35,740 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 03:04:35,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 03:04:35,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 03:04:35,740 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 03:04:35,740 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 03:04:35,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 03:04:35,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 03:04:35,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 03:04:35,741 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 03:04:35,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 03:04:35,741 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 03:04:35,741 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 03:04:35,741 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 03:04:35,741 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 03:04:35,741 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 03:04:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 03:04:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 03:04:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 03:04:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 03:04:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 03:04:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 03:04:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 03:04:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 03:04:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 03:04:35,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 03:04:35,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 03:04:35,862 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 03:04:35,877 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 03:04:36,283 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 03:04:36,398 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 03:04:36,398 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 03:04:36,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:04:36 BoogieIcfgContainer [2023-04-03 03:04:36,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 03:04:36,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 03:04:36,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 03:04:36,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 03:04:36,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 03:04:35" (1/3) ... [2023-04-03 03:04:36,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9446e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:04:36, skipping insertion in model container [2023-04-03 03:04:36,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:04:35" (2/3) ... [2023-04-03 03:04:36,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9446e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:04:36, skipping insertion in model container [2023-04-03 03:04:36,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:04:36" (3/3) ... [2023-04-03 03:04:36,413 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-03 03:04:36,430 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 03:04:36,431 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 03:04:36,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 03:04:36,476 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;@1fe859b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 03:04:36,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 03:04:36,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 74 states have (on average 1.7297297297297298) internal successors, (128), 76 states have internal predecessors, (128), 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 03:04:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 03:04:36,487 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:04:36,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:04:36,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:04:36,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:04:36,492 INFO L85 PathProgramCache]: Analyzing trace with hash -635608421, now seen corresponding path program 1 times [2023-04-03 03:04:36,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:04:36,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932846360] [2023-04-03 03:04:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:36,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:04:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:04:36,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:04:36,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932846360] [2023-04-03 03:04:36,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932846360] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:04:36,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:04:36,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:04:36,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788184526] [2023-04-03 03:04:36,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:04:36,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:04:36,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:04:36,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:04:36,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:04:36,991 INFO L87 Difference]: Start difference. First operand has 81 states, 74 states have (on average 1.7297297297297298) internal successors, (128), 76 states have internal predecessors, (128), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:04:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:04:37,062 INFO L93 Difference]: Finished difference Result 165 states and 252 transitions. [2023-04-03 03:04:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:04:37,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-04-03 03:04:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:04:37,075 INFO L225 Difference]: With dead ends: 165 [2023-04-03 03:04:37,075 INFO L226 Difference]: Without dead ends: 111 [2023-04-03 03:04:37,078 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 03:04:37,083 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 88 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:04:37,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 228 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:04:37,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-03 03:04:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2023-04-03 03:04:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.3333333333333333) internal successors, (140), 105 states have internal predecessors, (140), 2 states have call successors, (2), 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 03:04:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2023-04-03 03:04:37,143 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 52 [2023-04-03 03:04:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:04:37,143 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2023-04-03 03:04:37,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:04:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2023-04-03 03:04:37,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 03:04:37,145 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:04:37,145 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 03:04:37,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 03:04:37,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:04:37,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:04:37,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1664294204, now seen corresponding path program 1 times [2023-04-03 03:04:37,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:04:37,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039428845] [2023-04-03 03:04:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:37,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:04:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:37,297 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 03:04:37,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:04:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039428845] [2023-04-03 03:04:37,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039428845] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:04:37,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:04:37,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:04:37,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025113158] [2023-04-03 03:04:37,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:04:37,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:04:37,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:04:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:04:37,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:04:37,303 INFO L87 Difference]: Start difference. First operand 109 states and 143 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 03:04:37,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:04:37,425 INFO L93 Difference]: Finished difference Result 245 states and 343 transitions. [2023-04-03 03:04:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:04:37,427 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 03:04:37,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:04:37,430 INFO L225 Difference]: With dead ends: 245 [2023-04-03 03:04:37,431 INFO L226 Difference]: Without dead ends: 173 [2023-04-03 03:04:37,431 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 03:04:37,433 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 51 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:04:37,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 177 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:04:37,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-04-03 03:04:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2023-04-03 03:04:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.3832335329341316) internal successors, (231), 167 states have internal predecessors, (231), 2 states have call successors, (2), 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 03:04:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 234 transitions. [2023-04-03 03:04:37,470 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 234 transitions. Word has length 55 [2023-04-03 03:04:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:04:37,470 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 234 transitions. [2023-04-03 03:04:37,470 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 03:04:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 234 transitions. [2023-04-03 03:04:37,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 03:04:37,472 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:04:37,472 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 03:04:37,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 03:04:37,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:04:37,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:04:37,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1347235313, now seen corresponding path program 1 times [2023-04-03 03:04:37,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:04:37,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96795544] [2023-04-03 03:04:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:37,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:04:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:37,596 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 03:04:37,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:04:37,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96795544] [2023-04-03 03:04:37,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96795544] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:04:37,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:04:37,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:04:37,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200987789] [2023-04-03 03:04:37,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:04:37,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:04:37,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:04:37,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:04:37,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:04:37,600 INFO L87 Difference]: Start difference. First operand 171 states and 234 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 03:04:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:04:37,682 INFO L93 Difference]: Finished difference Result 423 states and 604 transitions. [2023-04-03 03:04:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:04:37,683 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 03:04:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:04:37,688 INFO L225 Difference]: With dead ends: 423 [2023-04-03 03:04:37,688 INFO L226 Difference]: Without dead ends: 289 [2023-04-03 03:04:37,694 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 03:04:37,697 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 46 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:04:37,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 173 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:04:37,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-04-03 03:04:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2023-04-03 03:04:37,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 283 states have (on average 1.4098939929328622) internal successors, (399), 283 states have internal predecessors, (399), 2 states have call successors, (2), 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 03:04:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 402 transitions. [2023-04-03 03:04:37,749 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 402 transitions. Word has length 58 [2023-04-03 03:04:37,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:04:37,751 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 402 transitions. [2023-04-03 03:04:37,751 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 03:04:37,751 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 402 transitions. [2023-04-03 03:04:37,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-03 03:04:37,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:04:37,758 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 03:04:37,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 03:04:37,761 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:04:37,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:04:37,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1515051484, now seen corresponding path program 1 times [2023-04-03 03:04:37,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:04:37,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838588461] [2023-04-03 03:04:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:37,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:04:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:37,856 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 03:04:37,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:04:37,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838588461] [2023-04-03 03:04:37,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838588461] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:04:37,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:04:37,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:04:37,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832251959] [2023-04-03 03:04:37,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:04:37,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:04:37,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:04:37,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:04:37,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:04:37,859 INFO L87 Difference]: Start difference. First operand 287 states and 402 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 03:04:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:04:37,960 INFO L93 Difference]: Finished difference Result 755 states and 1084 transitions. [2023-04-03 03:04:37,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:04:37,961 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 03:04:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:04:37,963 INFO L225 Difference]: With dead ends: 755 [2023-04-03 03:04:37,963 INFO L226 Difference]: Without dead ends: 505 [2023-04-03 03:04:37,966 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 03:04:37,975 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 41 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:04:37,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 169 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:04:37,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-04-03 03:04:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 503. [2023-04-03 03:04:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 499 states have (on average 1.4168336673346693) internal successors, (707), 499 states have internal predecessors, (707), 2 states have call successors, (2), 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 03:04:38,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 710 transitions. [2023-04-03 03:04:38,069 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 710 transitions. Word has length 61 [2023-04-03 03:04:38,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:04:38,071 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 710 transitions. [2023-04-03 03:04:38,071 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 03:04:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 710 transitions. [2023-04-03 03:04:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 03:04:38,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:04:38,074 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 03:04:38,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 03:04:38,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:04:38,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:04:38,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1327720934, now seen corresponding path program 1 times [2023-04-03 03:04:38,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:04:38,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585195242] [2023-04-03 03:04:38,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:38,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:04:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:38,180 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 03:04:38,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:04:38,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585195242] [2023-04-03 03:04:38,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585195242] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:04:38,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:04:38,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:04:38,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165521442] [2023-04-03 03:04:38,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:04:38,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:04:38,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:04:38,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:04:38,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:04:38,182 INFO L87 Difference]: Start difference. First operand 503 states and 710 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 03:04:38,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:04:38,370 INFO L93 Difference]: Finished difference Result 1371 states and 1960 transitions. [2023-04-03 03:04:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:04:38,371 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 03:04:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:04:38,377 INFO L225 Difference]: With dead ends: 1371 [2023-04-03 03:04:38,378 INFO L226 Difference]: Without dead ends: 905 [2023-04-03 03:04:38,379 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 03:04:38,380 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 36 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:04:38,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 165 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:04:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2023-04-03 03:04:38,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 903. [2023-04-03 03:04:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 899 states have (on average 1.4093437152391546) internal successors, (1267), 899 states have internal predecessors, (1267), 2 states have call successors, (2), 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 03:04:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1270 transitions. [2023-04-03 03:04:38,565 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1270 transitions. Word has length 64 [2023-04-03 03:04:38,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:04:38,566 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1270 transitions. [2023-04-03 03:04:38,566 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 03:04:38,566 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1270 transitions. [2023-04-03 03:04:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-03 03:04:38,567 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:04:38,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:04:38,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 03:04:38,568 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:04:38,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:04:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1891825189, now seen corresponding path program 1 times [2023-04-03 03:04:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:04:38,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731575001] [2023-04-03 03:04:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:04:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:38,771 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 03:04:38,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:04:38,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731575001] [2023-04-03 03:04:38,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731575001] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:04:38,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:04:38,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 03:04:38,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858992949] [2023-04-03 03:04:38,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:04:38,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 03:04:38,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:04:38,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 03:04:38,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:04:38,773 INFO L87 Difference]: Start difference. First operand 903 states and 1270 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:04:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:04:39,455 INFO L93 Difference]: Finished difference Result 3695 states and 5253 transitions. [2023-04-03 03:04:39,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 03:04:39,456 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-03 03:04:39,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:04:39,468 INFO L225 Difference]: With dead ends: 3695 [2023-04-03 03:04:39,468 INFO L226 Difference]: Without dead ends: 2829 [2023-04-03 03:04:39,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-03 03:04:39,472 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 558 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:04:39,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1330 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:04:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2023-04-03 03:04:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 1251. [2023-04-03 03:04:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1247 states have (on average 1.396952686447474) internal successors, (1742), 1247 states have internal predecessors, (1742), 2 states have call successors, (2), 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 03:04:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1745 transitions. [2023-04-03 03:04:39,694 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1745 transitions. Word has length 67 [2023-04-03 03:04:39,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:04:39,696 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1745 transitions. [2023-04-03 03:04:39,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:04:39,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1745 transitions. [2023-04-03 03:04:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-03 03:04:39,696 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:04:39,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:04:39,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 03:04:39,697 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:04:39,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:04:39,697 INFO L85 PathProgramCache]: Analyzing trace with hash 379648896, now seen corresponding path program 1 times [2023-04-03 03:04:39,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:04:39,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248228616] [2023-04-03 03:04:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:39,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:04:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:39,787 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 03:04:39,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:04:39,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248228616] [2023-04-03 03:04:39,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248228616] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:04:39,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:04:39,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:04:39,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536019013] [2023-04-03 03:04:39,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:04:39,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:04:39,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:04:39,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:04:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:04:39,789 INFO L87 Difference]: Start difference. First operand 1251 states and 1745 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:04:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:04:40,102 INFO L93 Difference]: Finished difference Result 3185 states and 4491 transitions. [2023-04-03 03:04:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:04:40,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-04-03 03:04:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:04:40,110 INFO L225 Difference]: With dead ends: 3185 [2023-04-03 03:04:40,110 INFO L226 Difference]: Without dead ends: 1971 [2023-04-03 03:04:40,113 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 03:04:40,114 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 30 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:04:40,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 137 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:04:40,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2023-04-03 03:04:40,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1969. [2023-04-03 03:04:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.4055979643765903) internal successors, (2762), 1965 states have internal predecessors, (2762), 2 states have call successors, (2), 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 03:04:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2765 transitions. [2023-04-03 03:04:40,493 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2765 transitions. Word has length 69 [2023-04-03 03:04:40,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:04:40,493 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2765 transitions. [2023-04-03 03:04:40,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:04:40,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2765 transitions. [2023-04-03 03:04:40,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-03 03:04:40,494 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:04:40,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:04:40,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 03:04:40,494 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:04:40,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:04:40,495 INFO L85 PathProgramCache]: Analyzing trace with hash 399698239, now seen corresponding path program 1 times [2023-04-03 03:04:40,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:04:40,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101720164] [2023-04-03 03:04:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:40,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:04:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:40,787 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 03:04:40,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:04:40,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101720164] [2023-04-03 03:04:40,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101720164] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:04:40,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:04:40,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 03:04:40,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637614718] [2023-04-03 03:04:40,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:04:40,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 03:04:40,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:04:40,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 03:04:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:04:40,793 INFO L87 Difference]: Start difference. First operand 1969 states and 2765 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:04:41,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:04:41,237 INFO L93 Difference]: Finished difference Result 3901 states and 5492 transitions. [2023-04-03 03:04:41,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 03:04:41,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-04-03 03:04:41,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:04:41,245 INFO L225 Difference]: With dead ends: 3901 [2023-04-03 03:04:41,245 INFO L226 Difference]: Without dead ends: 1971 [2023-04-03 03:04:41,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-04-03 03:04:41,252 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 136 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:04:41,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 308 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:04:41,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2023-04-03 03:04:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1969. [2023-04-03 03:04:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.4045801526717556) internal successors, (2760), 1965 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 03:04:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2763 transitions. [2023-04-03 03:04:41,550 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2763 transitions. Word has length 69 [2023-04-03 03:04:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:04:41,550 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2763 transitions. [2023-04-03 03:04:41,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:04:41,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2763 transitions. [2023-04-03 03:04:41,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-03 03:04:41,555 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:04:41,556 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] [2023-04-03 03:04:41,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 03:04:41,556 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:04:41,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:04:41,556 INFO L85 PathProgramCache]: Analyzing trace with hash -496165826, now seen corresponding path program 1 times [2023-04-03 03:04:41,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:04:41,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723918418] [2023-04-03 03:04:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:41,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:04:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:41,679 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 03:04:41,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:04:41,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723918418] [2023-04-03 03:04:41,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723918418] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:04:41,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:04:41,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:04:41,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977950573] [2023-04-03 03:04:41,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:04:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:04:41,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:04:41,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:04:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:04:41,683 INFO L87 Difference]: Start difference. First operand 1969 states and 2763 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 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 03:04:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:04:42,101 INFO L93 Difference]: Finished difference Result 3899 states and 5487 transitions. [2023-04-03 03:04:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:04:42,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 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 70 [2023-04-03 03:04:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:04:42,109 INFO L225 Difference]: With dead ends: 3899 [2023-04-03 03:04:42,109 INFO L226 Difference]: Without dead ends: 1969 [2023-04-03 03:04:42,113 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 03:04:42,115 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 186 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:04:42,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 87 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:04:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2023-04-03 03:04:42,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1969. [2023-04-03 03:04:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.3903307888040712) internal successors, (2732), 1965 states have internal predecessors, (2732), 2 states have call successors, (2), 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 03:04:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2735 transitions. [2023-04-03 03:04:42,498 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2735 transitions. Word has length 70 [2023-04-03 03:04:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:04:42,499 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2735 transitions. [2023-04-03 03:04:42,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 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 03:04:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2735 transitions. [2023-04-03 03:04:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-03 03:04:42,500 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:04:42,500 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] [2023-04-03 03:04:42,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 03:04:42,500 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:04:42,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:04:42,501 INFO L85 PathProgramCache]: Analyzing trace with hash 369366563, now seen corresponding path program 1 times [2023-04-03 03:04:42,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:04:42,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075154905] [2023-04-03 03:04:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:42,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:04:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:42,607 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 03:04:42,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:04:42,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075154905] [2023-04-03 03:04:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075154905] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:04:42,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:04:42,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:04:42,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302772484] [2023-04-03 03:04:42,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:04:42,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:04:42,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:04:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:04:42,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:04:42,609 INFO L87 Difference]: Start difference. First operand 1969 states and 2735 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 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 03:04:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:04:43,034 INFO L93 Difference]: Finished difference Result 3899 states and 5431 transitions. [2023-04-03 03:04:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:04:43,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 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 70 [2023-04-03 03:04:43,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:04:43,042 INFO L225 Difference]: With dead ends: 3899 [2023-04-03 03:04:43,043 INFO L226 Difference]: Without dead ends: 1969 [2023-04-03 03:04:43,047 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 03:04:43,047 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 209 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:04:43,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 71 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:04:43,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2023-04-03 03:04:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1969. [2023-04-03 03:04:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.3699745547073792) internal successors, (2692), 1965 states have internal predecessors, (2692), 2 states have call successors, (2), 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 03:04:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2695 transitions. [2023-04-03 03:04:43,375 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2695 transitions. Word has length 70 [2023-04-03 03:04:43,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:04:43,375 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2695 transitions. [2023-04-03 03:04:43,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 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 03:04:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2695 transitions. [2023-04-03 03:04:43,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-03 03:04:43,376 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:04:43,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:04:43,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 03:04:43,377 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:04:43,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:04:43,377 INFO L85 PathProgramCache]: Analyzing trace with hash -393497144, now seen corresponding path program 1 times [2023-04-03 03:04:43,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:04:43,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490961147] [2023-04-03 03:04:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:43,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:04:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:43,469 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 03:04:43,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:04:43,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490961147] [2023-04-03 03:04:43,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490961147] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:04:43,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:04:43,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:04:43,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517009331] [2023-04-03 03:04:43,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:04:43,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:04:43,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:04:43,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:04:43,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:04:43,471 INFO L87 Difference]: Start difference. First operand 1969 states and 2695 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 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 03:04:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:04:43,832 INFO L93 Difference]: Finished difference Result 3899 states and 5351 transitions. [2023-04-03 03:04:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:04:43,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 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 70 [2023-04-03 03:04:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:04:43,840 INFO L225 Difference]: With dead ends: 3899 [2023-04-03 03:04:43,841 INFO L226 Difference]: Without dead ends: 1969 [2023-04-03 03:04:43,844 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 03:04:43,845 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 167 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:04:43,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 95 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:04:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2023-04-03 03:04:44,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1969. [2023-04-03 03:04:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.3567430025445293) internal successors, (2666), 1965 states have internal predecessors, (2666), 2 states have call successors, (2), 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 03:04:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2669 transitions. [2023-04-03 03:04:44,250 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2669 transitions. Word has length 70 [2023-04-03 03:04:44,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:04:44,250 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2669 transitions. [2023-04-03 03:04:44,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 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 03:04:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2669 transitions. [2023-04-03 03:04:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-03 03:04:44,251 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:04:44,251 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] [2023-04-03 03:04:44,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 03:04:44,251 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:04:44,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:04:44,252 INFO L85 PathProgramCache]: Analyzing trace with hash -922787645, now seen corresponding path program 1 times [2023-04-03 03:04:44,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:04:44,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022514740] [2023-04-03 03:04:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:44,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:04:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:44,508 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 03:04:44,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:04:44,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022514740] [2023-04-03 03:04:44,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022514740] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:04:44,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:04:44,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:04:44,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841549243] [2023-04-03 03:04:44,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:04:44,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:04:44,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:04:44,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:04:44,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:04:44,510 INFO L87 Difference]: Start difference. First operand 1969 states and 2669 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 03:04:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:04:45,261 INFO L93 Difference]: Finished difference Result 3238 states and 4332 transitions. [2023-04-03 03:04:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 03:04:45,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 70 [2023-04-03 03:04:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:04:45,277 INFO L225 Difference]: With dead ends: 3238 [2023-04-03 03:04:45,277 INFO L226 Difference]: Without dead ends: 3236 [2023-04-03 03:04:45,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-03 03:04:45,279 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 95 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:04:45,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 409 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:04:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2023-04-03 03:04:45,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2033. [2023-04-03 03:04:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2029 states have (on average 1.3218334154756037) internal successors, (2682), 2029 states have internal predecessors, (2682), 2 states have call successors, (2), 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 03:04:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 2685 transitions. [2023-04-03 03:04:45,751 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 2685 transitions. Word has length 70 [2023-04-03 03:04:45,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:04:45,751 INFO L495 AbstractCegarLoop]: Abstraction has 2033 states and 2685 transitions. [2023-04-03 03:04:45,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 03:04:45,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 2685 transitions. [2023-04-03 03:04:45,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-03 03:04:45,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:04:45,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:04:45,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 03:04:45,753 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:04:45,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:04:45,753 INFO L85 PathProgramCache]: Analyzing trace with hash 423857295, now seen corresponding path program 1 times [2023-04-03 03:04:45,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:04:45,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216237261] [2023-04-03 03:04:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:45,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:04:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:04:52,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:04:52,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216237261] [2023-04-03 03:04:52,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216237261] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:04:52,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588884278] [2023-04-03 03:04:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:04:52,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:04:52,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:04:52,123 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 03:04:52,125 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 03:04:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:04:52,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 80 conjunts are in the unsatisfiable core [2023-04-03 03:04:52,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:05:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:05:04,281 INFO L327 TraceCheckSpWp]: Computing backward predicates...