/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:06:01,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:06:01,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:06:01,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:06:01,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:06:01,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:06:01,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:06:01,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:06:01,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:06:01,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:06:01,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:06:01,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:06:01,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:06:01,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:06:01,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:06:01,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:06:01,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:06:01,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:06:01,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:06:01,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:06:01,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:06:01,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:06:01,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:06:01,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:06:01,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:06:01,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:06:01,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:06:01,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:06:01,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:06:01,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:06:01,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:06:01,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:06:01,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:06:01,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:06:01,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:06:01,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:06:01,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:06:01,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:06:01,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:06:01,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:06:01,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:06:01,654 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 [2023-03-31 22:06:01,681 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:06:01,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:06:01,682 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:06:01,682 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:06:01,683 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:06:01,683 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:06:01,683 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:06:01,684 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:06:01,684 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:06:01,684 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:06:01,685 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:06:01,685 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:06:01,685 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:06:01,685 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:06:01,685 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:06:01,685 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:06:01,686 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:06:01,686 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:06:01,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:06:01,687 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:06:01,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:06:01,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:06:01,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:06:01,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:06:01,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:06:01,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:06:01,687 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:06:01,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:06:01,688 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:06:01,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:06:01,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:06:01,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:06:01,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:06:01,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:06:01,689 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:06:01,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:06:01,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:06:01,689 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:06:01,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:06:01,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:06:01,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:06:01,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:06:01,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:06:01,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:06:01,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:06:01,930 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:06:01,931 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:06:01,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label59.c [2023-03-31 22:06:02,922 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:06:03,312 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:06:03,312 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label59.c [2023-03-31 22:06:03,338 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/952dda6a6/d5e2ba033ce9462ebb9af75a6d797232/FLAGb58c1106d [2023-03-31 22:06:03,352 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/952dda6a6/d5e2ba033ce9462ebb9af75a6d797232 [2023-03-31 22:06:03,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:06:03,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:06:03,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:06:03,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:06:03,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:06:03,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:06:03" (1/1) ... [2023-03-31 22:06:03,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d754ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:06:03, skipping insertion in model container [2023-03-31 22:06:03,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:06:03" (1/1) ... [2023-03-31 22:06:03,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:06:03,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:06:03,714 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/eca-rers2012/Problem13_label59.c[6607,6620] [2023-03-31 22:06:04,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:06:04,321 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:06:04,344 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/eca-rers2012/Problem13_label59.c[6607,6620] [2023-03-31 22:06:04,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:06:04,724 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:06:04,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:06:04 WrapperNode [2023-03-31 22:06:04,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:06:04,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:06:04,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:06:04,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:06:04,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:06:04" (1/1) ... [2023-03-31 22:06:04,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:06:04" (1/1) ... [2023-03-31 22:06:04,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:06:04" (1/1) ... [2023-03-31 22:06:04,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:06:04" (1/1) ... [2023-03-31 22:06:04,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:06:04" (1/1) ... [2023-03-31 22:06:04,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:06:04" (1/1) ... [2023-03-31 22:06:04,939 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:06:04" (1/1) ... [2023-03-31 22:06:04,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:06:04" (1/1) ... [2023-03-31 22:06:04,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:06:04,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:06:04,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:06:04,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:06:04,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:06:04" (1/1) ... [2023-03-31 22:06:04,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:06:04,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:06:05,008 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) [2023-03-31 22:06:05,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:06:05,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:06:05,037 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:06:05,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:06:05,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:06:05,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:06:05,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:06:05,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:06:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:06:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:06:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:06:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:06:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:06:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:06:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:06:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:06:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:06:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:06:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:06:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:06:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:06:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:06:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:06:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:06:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:06:05,026 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 [2023-03-31 22:06:05,111 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:06:05,113 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:06:08,722 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:06:10,812 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:06:10,812 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:06:10,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:06:10 BoogieIcfgContainer [2023-03-31 22:06:10,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:06:10,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:06:10,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:06:10,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:06:10,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:06:03" (1/3) ... [2023-03-31 22:06:10,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159ef9ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:06:10, skipping insertion in model container [2023-03-31 22:06:10,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:06:04" (2/3) ... [2023-03-31 22:06:10,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159ef9ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:06:10, skipping insertion in model container [2023-03-31 22:06:10,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:06:10" (3/3) ... [2023-03-31 22:06:10,821 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label59.c [2023-03-31 22:06:10,835 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:06:10,836 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:06:10,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:06:10,900 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;@4f47b5a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:06:10,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:06:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:06:10,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:06:10,913 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:10,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:06:10,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:10,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:10,919 INFO L85 PathProgramCache]: Analyzing trace with hash -330929868, now seen corresponding path program 1 times [2023-03-31 22:06:10,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:10,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201653848] [2023-03-31 22:06:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:10,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:06:11,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:11,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201653848] [2023-03-31 22:06:11,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201653848] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:06:11,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:06:11,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:06:11,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646509413] [2023-03-31 22:06:11,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:06:11,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:06:11,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:06:11,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:06:11,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:06:11,362 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:06:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:06:14,959 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:06:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:06:14,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:06:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:06:14,981 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:06:14,981 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:06:14,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:06:14,991 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 715 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 2997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:06:14,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 104 Invalid, 2997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-03-31 22:06:15,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:06:15,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1360. [2023-03-31 22:06:15,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1342 states have (on average 1.9418777943368106) internal successors, (2606), 1342 states have internal predecessors, (2606), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-03-31 22:06:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2629 transitions. [2023-03-31 22:06:15,098 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2629 transitions. Word has length 11 [2023-03-31 22:06:15,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:06:15,099 INFO L495 AbstractCegarLoop]: Abstraction has 1360 states and 2629 transitions. [2023-03-31 22:06:15,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:06:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2629 transitions. [2023-03-31 22:06:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:06:15,100 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:15,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:06:15,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:06:15,101 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:15,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:15,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1151782779, now seen corresponding path program 1 times [2023-03-31 22:06:15,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:15,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191772748] [2023-03-31 22:06:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:15,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:06:15,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:15,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191772748] [2023-03-31 22:06:15,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191772748] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:06:15,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:06:15,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:06:15,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373426680] [2023-03-31 22:06:15,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:06:15,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:06:15,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:06:15,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:06:15,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:06:15,226 INFO L87 Difference]: Start difference. First operand 1360 states and 2629 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:06:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:06:19,130 INFO L93 Difference]: Finished difference Result 4145 states and 8028 transitions. [2023-03-31 22:06:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:06:19,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-03-31 22:06:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:06:19,145 INFO L225 Difference]: With dead ends: 4145 [2023-03-31 22:06:19,146 INFO L226 Difference]: Without dead ends: 2790 [2023-03-31 22:06:19,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:06:19,162 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2457 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3741 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2457 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 3741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:06:19,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2457 Valid, 109 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1164 Valid, 3741 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-03-31 22:06:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-03-31 22:06:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2730. [2023-03-31 22:06:19,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2687 states have (on average 1.6278377372534425) internal successors, (4374), 2692 states have internal predecessors, (4374), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75) [2023-03-31 22:06:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 4464 transitions. [2023-03-31 22:06:19,223 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 4464 transitions. Word has length 21 [2023-03-31 22:06:19,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:06:19,224 INFO L495 AbstractCegarLoop]: Abstraction has 2730 states and 4464 transitions. [2023-03-31 22:06:19,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:06:19,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 4464 transitions. [2023-03-31 22:06:19,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 22:06:19,225 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:19,225 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:06:19,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:06:19,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:19,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:19,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1319805703, now seen corresponding path program 1 times [2023-03-31 22:06:19,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:19,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824957175] [2023-03-31 22:06:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:19,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:06:19,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:19,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824957175] [2023-03-31 22:06:19,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824957175] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:06:19,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:06:19,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:06:19,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103949195] [2023-03-31 22:06:19,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:06:19,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:06:19,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:06:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:06:19,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:06:19,399 INFO L87 Difference]: Start difference. First operand 2730 states and 4464 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:06:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:06:23,859 INFO L93 Difference]: Finished difference Result 8480 states and 14186 transitions. [2023-03-31 22:06:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:06:23,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-03-31 22:06:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:06:23,888 INFO L225 Difference]: With dead ends: 8480 [2023-03-31 22:06:23,889 INFO L226 Difference]: Without dead ends: 5755 [2023-03-31 22:06:23,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:06:23,895 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2188 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4657 mSolverCounterSat, 1048 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2188 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 5705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1048 IncrementalHoareTripleChecker+Valid, 4657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:06:23,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2188 Valid, 127 Invalid, 5705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1048 Valid, 4657 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-03-31 22:06:23,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2023-03-31 22:06:23,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5609. [2023-03-31 22:06:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5609 states, 5463 states have (on average 1.4363902617609372) internal successors, (7847), 5498 states have internal predecessors, (7847), 27 states have call successors, (27), 27 states have call predecessors, (27), 118 states have return successors, (459), 83 states have call predecessors, (459), 26 states have call successors, (459) [2023-03-31 22:06:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5609 states to 5609 states and 8333 transitions. [2023-03-31 22:06:24,008 INFO L78 Accepts]: Start accepts. Automaton has 5609 states and 8333 transitions. Word has length 27 [2023-03-31 22:06:24,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:06:24,009 INFO L495 AbstractCegarLoop]: Abstraction has 5609 states and 8333 transitions. [2023-03-31 22:06:24,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:06:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5609 states and 8333 transitions. [2023-03-31 22:06:24,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 22:06:24,011 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:24,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:06:24,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:06:24,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:24,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:24,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1860840698, now seen corresponding path program 1 times [2023-03-31 22:06:24,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:24,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247537240] [2023-03-31 22:06:24,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:24,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:06:24,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:24,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247537240] [2023-03-31 22:06:24,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247537240] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:06:24,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438234640] [2023-03-31 22:06:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:24,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:06:24,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:06:24,183 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) [2023-03-31 22:06:24,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:06:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:24,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:06:24,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:06:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:06:24,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:06:24,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438234640] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:06:24,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:06:24,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:06:24,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391688587] [2023-03-31 22:06:24,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:06:24,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:06:24,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:06:24,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:06:24,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:06:24,365 INFO L87 Difference]: Start difference. First operand 5609 states and 8333 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:06:28,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:06:28,476 INFO L93 Difference]: Finished difference Result 17105 states and 26427 transitions. [2023-03-31 22:06:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:06:28,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-03-31 22:06:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:06:28,517 INFO L225 Difference]: With dead ends: 17105 [2023-03-31 22:06:28,517 INFO L226 Difference]: Without dead ends: 11501 [2023-03-31 22:06:28,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:06:28,539 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2098 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4111 mSolverCounterSat, 1137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1137 IncrementalHoareTripleChecker+Valid, 4111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:06:28,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2098 Valid, 95 Invalid, 5248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1137 Valid, 4111 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-03-31 22:06:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2023-03-31 22:06:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 11238. [2023-03-31 22:06:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11238 states, 10909 states have (on average 1.2722522687689064) internal successors, (13879), 10998 states have internal predecessors, (13879), 51 states have call successors, (51), 51 states have call predecessors, (51), 277 states have return successors, (1463), 188 states have call predecessors, (1463), 50 states have call successors, (1463) [2023-03-31 22:06:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 15393 transitions. [2023-03-31 22:06:28,794 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 15393 transitions. Word has length 45 [2023-03-31 22:06:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:06:28,795 INFO L495 AbstractCegarLoop]: Abstraction has 11238 states and 15393 transitions. [2023-03-31 22:06:28,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:06:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 15393 transitions. [2023-03-31 22:06:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-03-31 22:06:28,801 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:28,802 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:06:28,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:06:29,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:06:29,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:29,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:29,013 INFO L85 PathProgramCache]: Analyzing trace with hash -846142081, now seen corresponding path program 1 times [2023-03-31 22:06:29,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:29,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926729853] [2023-03-31 22:06:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:29,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:06:29,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:29,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926729853] [2023-03-31 22:06:29,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926729853] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:06:29,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:06:29,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:06:29,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258916357] [2023-03-31 22:06:29,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:06:29,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:06:29,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:06:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:06:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:06:29,391 INFO L87 Difference]: Start difference. First operand 11238 states and 15393 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:06:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:06:33,536 INFO L93 Difference]: Finished difference Result 27493 states and 37626 transitions. [2023-03-31 22:06:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:06:33,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2023-03-31 22:06:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:06:33,579 INFO L225 Difference]: With dead ends: 27493 [2023-03-31 22:06:33,579 INFO L226 Difference]: Without dead ends: 16260 [2023-03-31 22:06:33,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:06:33,598 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2075 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 4356 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 5083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 4356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:06:33,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2075 Valid, 105 Invalid, 5083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 4356 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-03-31 22:06:33,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16260 states. [2023-03-31 22:06:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16260 to 15699. [2023-03-31 22:06:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15699 states, 15235 states have (on average 1.2224483098129308) internal successors, (18624), 15366 states have internal predecessors, (18624), 71 states have call successors, (71), 71 states have call predecessors, (71), 392 states have return successors, (2076), 261 states have call predecessors, (2076), 70 states have call successors, (2076) [2023-03-31 22:06:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15699 states to 15699 states and 20771 transitions. [2023-03-31 22:06:33,882 INFO L78 Accepts]: Start accepts. Automaton has 15699 states and 20771 transitions. Word has length 70 [2023-03-31 22:06:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:06:33,883 INFO L495 AbstractCegarLoop]: Abstraction has 15699 states and 20771 transitions. [2023-03-31 22:06:33,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:06:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 15699 states and 20771 transitions. [2023-03-31 22:06:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-31 22:06:33,886 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:33,886 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:06:33,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:06:33,886 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:33,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:33,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1307174949, now seen corresponding path program 1 times [2023-03-31 22:06:33,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:33,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780194082] [2023-03-31 22:06:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:33,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-31 22:06:34,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:34,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780194082] [2023-03-31 22:06:34,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780194082] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:06:34,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:06:34,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:06:34,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249686595] [2023-03-31 22:06:34,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:06:34,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:06:34,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:06:34,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:06:34,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:06:34,011 INFO L87 Difference]: Start difference. First operand 15699 states and 20771 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:06:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:06:37,243 INFO L93 Difference]: Finished difference Result 43160 states and 60103 transitions. [2023-03-31 22:06:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:06:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-03-31 22:06:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:06:37,334 INFO L225 Difference]: With dead ends: 43160 [2023-03-31 22:06:37,334 INFO L226 Difference]: Without dead ends: 28048 [2023-03-31 22:06:37,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:06:37,370 INFO L413 NwaCegarLoop]: 1244 mSDtfsCounter, 675 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2251 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 2251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:06:37,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1272 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 2251 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-31 22:06:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28048 states. [2023-03-31 22:06:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28048 to 25209. [2023-03-31 22:06:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25209 states, 24538 states have (on average 1.191376640312984) internal successors, (29234), 24728 states have internal predecessors, (29234), 114 states have call successors, (114), 114 states have call predecessors, (114), 556 states have return successors, (4325), 366 states have call predecessors, (4325), 113 states have call successors, (4325) [2023-03-31 22:06:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25209 states to 25209 states and 33673 transitions. [2023-03-31 22:06:37,954 INFO L78 Accepts]: Start accepts. Automaton has 25209 states and 33673 transitions. Word has length 79 [2023-03-31 22:06:37,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:06:37,956 INFO L495 AbstractCegarLoop]: Abstraction has 25209 states and 33673 transitions. [2023-03-31 22:06:37,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:06:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 25209 states and 33673 transitions. [2023-03-31 22:06:37,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-03-31 22:06:37,958 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:37,959 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 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] [2023-03-31 22:06:37,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 22:06:37,959 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:37,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:37,959 INFO L85 PathProgramCache]: Analyzing trace with hash 540807188, now seen corresponding path program 1 times [2023-03-31 22:06:37,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:37,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514937522] [2023-03-31 22:06:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:37,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 22:06:38,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:38,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514937522] [2023-03-31 22:06:38,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514937522] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:06:38,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065118318] [2023-03-31 22:06:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:38,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:06:38,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:06:38,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:06:38,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:06:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:38,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 22:06:38,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:06:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-03-31 22:06:38,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:06:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-03-31 22:06:38,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065118318] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:06:38,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:06:38,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-03-31 22:06:38,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51635608] [2023-03-31 22:06:38,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:06:38,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:06:38,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:06:38,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:06:38,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:06:38,739 INFO L87 Difference]: Start difference. First operand 25209 states and 33673 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:06:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:06:42,495 INFO L93 Difference]: Finished difference Result 61443 states and 85110 transitions. [2023-03-31 22:06:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:06:42,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2023-03-31 22:06:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:06:42,600 INFO L225 Difference]: With dead ends: 61443 [2023-03-31 22:06:42,600 INFO L226 Difference]: Without dead ends: 36624 [2023-03-31 22:06:42,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-03-31 22:06:42,647 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1622 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3716 mSolverCounterSat, 814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1622 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 4530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 3716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:06:42,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1622 Valid, 97 Invalid, 4530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [814 Valid, 3716 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-03-31 22:06:42,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36624 states. [2023-03-31 22:06:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36624 to 35480. [2023-03-31 22:06:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35480 states, 34428 states have (on average 1.1860694783315906) internal successors, (40834), 34754 states have internal predecessors, (40834), 158 states have call successors, (158), 158 states have call predecessors, (158), 893 states have return successors, (6838), 567 states have call predecessors, (6838), 157 states have call successors, (6838) [2023-03-31 22:06:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35480 states to 35480 states and 47830 transitions. [2023-03-31 22:06:43,444 INFO L78 Accepts]: Start accepts. Automaton has 35480 states and 47830 transitions. Word has length 85 [2023-03-31 22:06:43,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:06:43,445 INFO L495 AbstractCegarLoop]: Abstraction has 35480 states and 47830 transitions. [2023-03-31 22:06:43,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:06:43,446 INFO L276 IsEmpty]: Start isEmpty. Operand 35480 states and 47830 transitions. [2023-03-31 22:06:43,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-03-31 22:06:43,447 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:43,447 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:06:43,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:06:43,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-03-31 22:06:43,653 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:43,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:43,654 INFO L85 PathProgramCache]: Analyzing trace with hash -288998869, now seen corresponding path program 1 times [2023-03-31 22:06:43,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:43,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502628249] [2023-03-31 22:06:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:43,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-03-31 22:06:43,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:43,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502628249] [2023-03-31 22:06:43,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502628249] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:06:43,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:06:43,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:06:43,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050276281] [2023-03-31 22:06:43,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:06:43,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:06:43,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:06:43,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:06:43,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:06:43,783 INFO L87 Difference]: Start difference. First operand 35480 states and 47830 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:06:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:06:46,906 INFO L93 Difference]: Finished difference Result 78690 states and 110783 transitions. [2023-03-31 22:06:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:06:46,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 102 [2023-03-31 22:06:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:06:47,043 INFO L225 Difference]: With dead ends: 78690 [2023-03-31 22:06:47,043 INFO L226 Difference]: Without dead ends: 43600 [2023-03-31 22:06:47,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:06:47,091 INFO L413 NwaCegarLoop]: 958 mSDtfsCounter, 852 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:06:47,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 986 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-03-31 22:06:47,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43600 states. [2023-03-31 22:06:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43600 to 43296. [2023-03-31 22:06:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43296 states, 42192 states have (on average 1.1843003412969284) internal successors, (49968), 42516 states have internal predecessors, (49968), 194 states have call successors, (194), 194 states have call predecessors, (194), 909 states have return successors, (8289), 585 states have call predecessors, (8289), 193 states have call successors, (8289) [2023-03-31 22:06:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43296 states to 43296 states and 58451 transitions. [2023-03-31 22:06:47,887 INFO L78 Accepts]: Start accepts. Automaton has 43296 states and 58451 transitions. Word has length 102 [2023-03-31 22:06:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:06:47,888 INFO L495 AbstractCegarLoop]: Abstraction has 43296 states and 58451 transitions. [2023-03-31 22:06:47,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:06:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 43296 states and 58451 transitions. [2023-03-31 22:06:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-03-31 22:06:47,893 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:47,893 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:06:47,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 22:06:47,894 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:47,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:47,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1665251651, now seen corresponding path program 1 times [2023-03-31 22:06:47,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:47,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186422054] [2023-03-31 22:06:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:47,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 101 proven. 10 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-31 22:06:48,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:48,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186422054] [2023-03-31 22:06:48,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186422054] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:06:48,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002292048] [2023-03-31 22:06:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:48,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:06:48,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:06:48,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:06:48,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:06:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:48,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:06:48,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:06:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-03-31 22:06:48,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:06:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 101 proven. 10 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-31 22:06:48,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002292048] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:06:48,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542889303] [2023-03-31 22:06:48,371 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-03-31 22:06:48,371 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:06:48,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:06:48,377 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:06:48,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:06:48,703 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-03-31 22:06:48,817 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2023-03-31 22:06:48,981 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8943 conjuctions. This might take some time... [2023-03-31 22:06:49,116 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 69 conjuctions. [2023-03-31 22:06:49,160 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2023-03-31 22:06:49,259 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5253 conjuctions. This might take some time... [2023-03-31 22:06:49,325 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 97 conjuctions. [2023-03-31 22:06:49,875 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 56 for LOIs [2023-03-31 22:06:50,014 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2023-03-31 22:06:51,360 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 28740 conjuctions. This might take some time... [2023-03-31 22:06:53,982 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 340 conjuctions.