/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:32:02,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:32:02,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:32:02,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:32:02,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:32:02,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:32:02,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:32:02,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:32:02,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:32:02,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:32:02,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:32:02,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:32:02,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:32:02,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:32:02,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:32:02,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:32:02,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:32:02,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:32:02,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:32:02,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:32:02,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:32:02,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:32:02,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:32:02,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:32:02,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:32:02,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:32:02,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:32:02,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:32:02,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:32:02,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:32:02,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:32:02,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:32:02,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:32:02,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:32:02,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:32:02,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:32:02,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:32:02,585 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:32:02,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:32:02,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:32:02,586 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:32:02,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:32:02,586 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:32:02,586 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:32:02,586 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:32:02,587 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:32:02,587 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:32:02,587 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:32:02,587 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:32:02,587 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:32:02,587 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:32:02,587 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:32:02,587 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:32:02,587 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:32:02,587 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:32:02,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:32:02,588 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:32:02,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:32:02,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:32:02,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:32:02,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:32:02,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:32:02,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:32:02,588 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:32:02,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:32:02,588 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:32:02,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:32:02,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:32:02,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:32:02,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:32:02,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:32:02,589 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:32:02,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:32:02,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:32:02,589 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:32:02,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:32:02,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:32:02,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:32:02,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:32:02,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:32:02,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:32:02,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:32:02,775 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:32:02,778 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:32:02,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label36.c [2023-04-01 04:32:03,713 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:32:04,131 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:32:04,131 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label36.c [2023-04-01 04:32:04,169 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1829b6f8/8f43bb1671974e9b997a0d5b5c9772ca/FLAG51c88fedf [2023-04-01 04:32:04,181 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1829b6f8/8f43bb1671974e9b997a0d5b5c9772ca [2023-04-01 04:32:04,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:32:04,185 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:32:04,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:32:04,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:32:04,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:32:04,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:32:04" (1/1) ... [2023-04-01 04:32:04,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a70a822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:32:04, skipping insertion in model container [2023-04-01 04:32:04,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:32:04" (1/1) ... [2023-04-01 04:32:04,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:32:04,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:32:04,658 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/Problem19_label36.c[4552,4565] [2023-04-01 04:32:05,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:32:05,516 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:32:05,539 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/Problem19_label36.c[4552,4565] [2023-04-01 04:32:06,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:32:06,040 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:32:06,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:32:06 WrapperNode [2023-04-01 04:32:06,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:32:06,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:32:06,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:32:06,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:32:06,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:32:06" (1/1) ... [2023-04-01 04:32:06,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:32:06" (1/1) ... [2023-04-01 04:32:06,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:32:06" (1/1) ... [2023-04-01 04:32:06,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:32:06" (1/1) ... [2023-04-01 04:32:06,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:32:06" (1/1) ... [2023-04-01 04:32:06,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:32:06" (1/1) ... [2023-04-01 04:32:06,410 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:32:06" (1/1) ... [2023-04-01 04:32:06,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:32:06" (1/1) ... [2023-04-01 04:32:06,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:32:06,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:32:06,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:32:06,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:32:06,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:32:06" (1/1) ... [2023-04-01 04:32:06,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:32:06,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:32:06,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:32:06,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:32:06,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:32:06,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:32:06,532 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:32:06,532 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:32:06,532 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:32:06,532 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:32:06,532 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:32:06,533 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 04:32:06,533 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 04:32:06,533 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:32:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:32:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:32:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:32:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:32:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 04:32:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 04:32:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:32:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:32:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:32:06,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:32:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:32:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:32:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:32:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:32:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:32:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:32:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:32:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:32:06,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:32:06,608 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:32:06,610 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:32:12,200 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:32:25,565 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:32:25,565 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:32:25,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:32:25 BoogieIcfgContainer [2023-04-01 04:32:25,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:32:25,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:32:25,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:32:25,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:32:25,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:32:04" (1/3) ... [2023-04-01 04:32:25,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e44a670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:32:25, skipping insertion in model container [2023-04-01 04:32:25,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:32:06" (2/3) ... [2023-04-01 04:32:25,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e44a670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:32:25, skipping insertion in model container [2023-04-01 04:32:25,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:32:25" (3/3) ... [2023-04-01 04:32:25,576 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label36.c [2023-04-01 04:32:25,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:32:25,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:32:25,655 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:32:25,661 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;@619bbd3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:32:25,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:32:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 04:32:25,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:32:25,675 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:32:25,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:32:25,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:32:25,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:32:25,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1235898851, now seen corresponding path program 1 times [2023-04-01 04:32:25,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:32:25,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506016559] [2023-04-01 04:32:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:32:25,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:32:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:32:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:32:25,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:32:25,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506016559] [2023-04-01 04:32:25,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506016559] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:32:25,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:32:25,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:32:25,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778446260] [2023-04-01 04:32:25,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:32:25,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:32:25,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:32:25,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:32:25,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:32:25,989 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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) [2023-04-01 04:32:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:32:31,437 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 04:32:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:32:31,439 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 [2023-04-01 04:32:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:32:31,475 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 04:32:31,475 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 04:32:31,486 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 [2023-04-01 04:32:31,490 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1265 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 4581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:32:31,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 737 Invalid, 4581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1219 Valid, 3362 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-04-01 04:32:31,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 04:32:31,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-04-01 04:32:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.6464556397681676) internal successors, (3693), 2243 states have internal predecessors, (3693), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 04:32:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3728 transitions. [2023-04-01 04:32:31,591 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3728 transitions. Word has length 11 [2023-04-01 04:32:31,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:32:31,592 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 3728 transitions. [2023-04-01 04:32:31,592 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) [2023-04-01 04:32:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3728 transitions. [2023-04-01 04:32:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:32:31,593 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:32:31,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:32:31,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:32:31,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:32:31,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:32:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash -730645695, now seen corresponding path program 1 times [2023-04-01 04:32:31,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:32:31,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351549602] [2023-04-01 04:32:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:32:31,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:32:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:32:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:32:31,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:32:31,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351549602] [2023-04-01 04:32:31,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351549602] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:32:31,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:32:31,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:32:31,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805973190] [2023-04-01 04:32:31,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:32:31,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:32:31,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:32:31,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:32:31,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:32:31,791 INFO L87 Difference]: Start difference. First operand 2269 states and 3728 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) [2023-04-01 04:32:39,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:32:39,049 INFO L93 Difference]: Finished difference Result 6943 states and 11442 transitions. [2023-04-01 04:32:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:32:39,054 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 [2023-04-01 04:32:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:32:39,080 INFO L225 Difference]: With dead ends: 6943 [2023-04-01 04:32:39,080 INFO L226 Difference]: Without dead ends: 4679 [2023-04-01 04:32:39,089 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 [2023-04-01 04:32:39,090 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 4036 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6593 mSolverCounterSat, 1794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1794 IncrementalHoareTripleChecker+Valid, 6593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:32:39,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4036 Valid, 181 Invalid, 8387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1794 Valid, 6593 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-04-01 04:32:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2023-04-01 04:32:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4607. [2023-04-01 04:32:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4531 states have (on average 1.414036636504083) internal successors, (6407), 4537 states have internal predecessors, (6407), 23 states have call successors, (23), 23 states have call predecessors, (23), 52 states have return successors, (137), 46 states have call predecessors, (137), 22 states have call successors, (137) [2023-04-01 04:32:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 6567 transitions. [2023-04-01 04:32:39,218 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 6567 transitions. Word has length 21 [2023-04-01 04:32:39,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:32:39,218 INFO L495 AbstractCegarLoop]: Abstraction has 4607 states and 6567 transitions. [2023-04-01 04:32:39,218 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) [2023-04-01 04:32:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 6567 transitions. [2023-04-01 04:32:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:32:39,219 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:32:39,219 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:32:39,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:32:39,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:32:39,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:32:39,220 INFO L85 PathProgramCache]: Analyzing trace with hash -930827604, now seen corresponding path program 1 times [2023-04-01 04:32:39,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:32:39,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698918344] [2023-04-01 04:32:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:32:39,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:32:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:32:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:32:39,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:32:39,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698918344] [2023-04-01 04:32:39,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698918344] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:32:39,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:32:39,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:32:39,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356914958] [2023-04-01 04:32:39,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:32:39,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:32:39,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:32:39,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:32:39,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:32:39,377 INFO L87 Difference]: Start difference. First operand 4607 states and 6567 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-04-01 04:32:45,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:32:45,370 INFO L93 Difference]: Finished difference Result 14148 states and 20540 transitions. [2023-04-01 04:32:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:32:45,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 04:32:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:32:45,414 INFO L225 Difference]: With dead ends: 14148 [2023-04-01 04:32:45,414 INFO L226 Difference]: Without dead ends: 9546 [2023-04-01 04:32:45,427 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 [2023-04-01 04:32:45,430 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 3495 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7164 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 8265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 7164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:32:45,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 175 Invalid, 8265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 7164 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-04-01 04:32:45,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2023-04-01 04:32:45,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8592. [2023-04-01 04:32:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8362 states have (on average 1.4227457546041617) internal successors, (11897), 8395 states have internal predecessors, (11897), 40 states have call successors, (40), 40 states have call predecessors, (40), 189 states have return successors, (602), 156 states have call predecessors, (602), 39 states have call successors, (602) [2023-04-01 04:32:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 12539 transitions. [2023-04-01 04:32:45,610 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 12539 transitions. Word has length 23 [2023-04-01 04:32:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:32:45,611 INFO L495 AbstractCegarLoop]: Abstraction has 8592 states and 12539 transitions. [2023-04-01 04:32:45,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-04-01 04:32:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 12539 transitions. [2023-04-01 04:32:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 04:32:45,612 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:32:45,612 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] [2023-04-01 04:32:45,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:32:45,612 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:32:45,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:32:45,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1118309346, now seen corresponding path program 1 times [2023-04-01 04:32:45,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:32:45,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664267488] [2023-04-01 04:32:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:32:45,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:32:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:32:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:32:45,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:32:45,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664267488] [2023-04-01 04:32:45,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664267488] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:32:45,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:32:45,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:32:45,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969388316] [2023-04-01 04:32:45,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:32:45,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:32:45,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:32:45,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:32:45,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:32:45,696 INFO L87 Difference]: Start difference. First operand 8592 states and 12539 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2023-04-01 04:32:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:32:52,415 INFO L93 Difference]: Finished difference Result 26245 states and 39095 transitions. [2023-04-01 04:32:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:32:52,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 33 [2023-04-01 04:32:52,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:32:52,478 INFO L225 Difference]: With dead ends: 26245 [2023-04-01 04:32:52,479 INFO L226 Difference]: Without dead ends: 17658 [2023-04-01 04:32:52,503 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 [2023-04-01 04:32:52,506 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 5995 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6471 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5995 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 7174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 6471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:32:52,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5995 Valid, 147 Invalid, 7174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 6471 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-04-01 04:32:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17658 states. [2023-04-01 04:32:52,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17658 to 17126. [2023-04-01 04:32:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17126 states, 16569 states have (on average 1.3635705232663407) internal successors, (22593), 16669 states have internal predecessors, (22593), 76 states have call successors, (76), 76 states have call predecessors, (76), 480 states have return successors, (1564), 380 states have call predecessors, (1564), 75 states have call successors, (1564) [2023-04-01 04:32:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17126 states to 17126 states and 24233 transitions. [2023-04-01 04:32:52,923 INFO L78 Accepts]: Start accepts. Automaton has 17126 states and 24233 transitions. Word has length 33 [2023-04-01 04:32:52,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:32:52,923 INFO L495 AbstractCegarLoop]: Abstraction has 17126 states and 24233 transitions. [2023-04-01 04:32:52,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2023-04-01 04:32:52,924 INFO L276 IsEmpty]: Start isEmpty. Operand 17126 states and 24233 transitions. [2023-04-01 04:32:52,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 04:32:52,928 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:32:52,928 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:32:52,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:32:52,929 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:32:52,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:32:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1341645238, now seen corresponding path program 1 times [2023-04-01 04:32:52,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:32:52,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520736738] [2023-04-01 04:32:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:32:52,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:32:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:32:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:32:53,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:32:53,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520736738] [2023-04-01 04:32:53,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520736738] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:32:53,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467006565] [2023-04-01 04:32:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:32:53,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:32:53,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:32:53,104 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:32:53,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:32:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:32:53,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:32:53,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:32:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:32:53,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:32:53,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467006565] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:32:53,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:32:53,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:32:53,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461007283] [2023-04-01 04:32:53,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:32:53,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:32:53,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:32:53,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:32:53,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:32:53,279 INFO L87 Difference]: Start difference. First operand 17126 states and 24233 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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) [2023-04-01 04:33:00,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:33:00,207 INFO L93 Difference]: Finished difference Result 46953 states and 69710 transitions. [2023-04-01 04:33:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:33:00,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 60 [2023-04-01 04:33:00,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:33:00,304 INFO L225 Difference]: With dead ends: 46953 [2023-04-01 04:33:00,305 INFO L226 Difference]: Without dead ends: 29832 [2023-04-01 04:33:00,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:33:00,347 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 3504 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 5917 mSolverCounterSat, 3178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3504 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 9095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3178 IncrementalHoareTripleChecker+Valid, 5917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:33:00,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3504 Valid, 135 Invalid, 9095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3178 Valid, 5917 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-04-01 04:33:00,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29832 states. [2023-04-01 04:33:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29832 to 29383. [2023-04-01 04:33:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29383 states, 28350 states have (on average 1.3067372134038802) internal successors, (37046), 28547 states have internal predecessors, (37046), 126 states have call successors, (126), 126 states have call predecessors, (126), 906 states have return successors, (3790), 709 states have call predecessors, (3790), 125 states have call successors, (3790) [2023-04-01 04:33:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29383 states to 29383 states and 40962 transitions. [2023-04-01 04:33:01,063 INFO L78 Accepts]: Start accepts. Automaton has 29383 states and 40962 transitions. Word has length 60 [2023-04-01 04:33:01,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:33:01,064 INFO L495 AbstractCegarLoop]: Abstraction has 29383 states and 40962 transitions. [2023-04-01 04:33:01,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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) [2023-04-01 04:33:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 29383 states and 40962 transitions. [2023-04-01 04:33:01,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-04-01 04:33:01,074 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:33:01,074 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:33:01,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:33:01,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:33:01,282 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:33:01,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:33:01,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1475421686, now seen corresponding path program 1 times [2023-04-01 04:33:01,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:33:01,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625992292] [2023-04-01 04:33:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:33:01,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:33:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:33:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 56 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 04:33:01,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:33:01,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625992292] [2023-04-01 04:33:01,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625992292] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:33:01,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872008272] [2023-04-01 04:33:01,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:33:01,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:33:01,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:33:01,615 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:33:01,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:33:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:33:01,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:33:01,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:33:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:33:01,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:33:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 56 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 04:33:02,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872008272] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:33:02,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864160372] [2023-04-01 04:33:02,032 INFO L159 IcfgInterpreter]: Started Sifa with 171 locations of interest [2023-04-01 04:33:02,032 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:33:02,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:33:02,039 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:33:02,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:33:02,163 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs