/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/Problem18_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:28:49,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:28:49,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:28:49,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:28:49,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:28:49,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:28:49,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:28:49,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:28:49,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:28:49,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:28:49,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:28:49,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:28:49,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:28:49,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:28:49,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:28:49,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:28:49,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:28:49,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:28:49,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:28:49,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:28:49,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:28:49,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:28:49,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:28:49,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:28:49,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:28:49,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:28:49,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:28:49,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:28:49,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:28:49,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:28:49,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:28:49,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:28:49,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:28:49,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:28:49,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:28:49,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:28:49,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:28:49,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:28:49,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:28:49,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:28:49,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:28:49,502 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 04:28:49,520 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:28:49,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:28:49,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:28:49,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:28:49,522 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:28:49,522 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:28:49,522 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:28:49,522 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:28:49,522 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:28:49,523 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:28:49,523 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:28:49,523 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:28:49,523 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:28:49,524 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:28:49,524 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:28:49,524 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:28:49,524 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:28:49,524 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:28:49,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:28:49,525 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:28:49,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:28:49,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:28:49,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:28:49,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:28:49,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:28:49,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:28:49,526 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:28:49,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:28:49,526 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:28:49,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:28:49,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:28:49,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:28:49,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:28:49,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:28:49,527 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:28:49,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:28:49,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:28:49,527 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:28:49,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:28:49,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:28:49,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:28:49,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:28:49,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:28:49,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:28:49,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:28:49,724 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:28:49,725 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:28:49,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label52.c [2023-04-01 04:28:50,693 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:28:51,057 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:28:51,058 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label52.c [2023-04-01 04:28:51,076 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c597f580/9be07a9f04004befa81a49ac67f5da18/FLAG3876b30f9 [2023-04-01 04:28:51,093 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c597f580/9be07a9f04004befa81a49ac67f5da18 [2023-04-01 04:28:51,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:28:51,097 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:28:51,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:28:51,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:28:51,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:28:51,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:28:51" (1/1) ... [2023-04-01 04:28:51,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a221e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:51, skipping insertion in model container [2023-04-01 04:28:51,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:28:51" (1/1) ... [2023-04-01 04:28:51,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:28:51,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:28:51,346 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/Problem18_label52.c[2002,2015] [2023-04-01 04:28:51,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:28:51,813 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:28:51,829 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/Problem18_label52.c[2002,2015] [2023-04-01 04:28:52,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:28:52,035 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:28:52,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:52 WrapperNode [2023-04-01 04:28:52,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:28:52,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:28:52,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:28:52,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:28:52,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:52" (1/1) ... [2023-04-01 04:28:52,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:52" (1/1) ... [2023-04-01 04:28:52,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:52" (1/1) ... [2023-04-01 04:28:52,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:52" (1/1) ... [2023-04-01 04:28:52,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:52" (1/1) ... [2023-04-01 04:28:52,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:52" (1/1) ... [2023-04-01 04:28:52,227 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:52" (1/1) ... [2023-04-01 04:28:52,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:52" (1/1) ... [2023-04-01 04:28:52,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:28:52,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:28:52,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:28:52,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:28:52,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:52" (1/1) ... [2023-04-01 04:28:52,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:28:52,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:28:52,274 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 04:28:52,292 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 04:28:52,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:28:52,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:28:52,303 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:28:52,303 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:28:52,303 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:28:52,303 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:28:52,303 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:28:52,303 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:28:52,304 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:28:52,304 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:28:52,304 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:28:52,304 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:28:52,304 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:28:52,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:28:52,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:28:52,304 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:28:52,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:28:52,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:28:52,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:28:52,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:28:52,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:28:52,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:28:52,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:28:52,402 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:28:52,403 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:28:54,632 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:29:00,585 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:29:00,586 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:29:00,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:29:00 BoogieIcfgContainer [2023-04-01 04:29:00,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:29:00,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:29:00,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:29:00,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:29:00,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:28:51" (1/3) ... [2023-04-01 04:29:00,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a4eb20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:29:00, skipping insertion in model container [2023-04-01 04:29:00,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:52" (2/3) ... [2023-04-01 04:29:00,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a4eb20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:29:00, skipping insertion in model container [2023-04-01 04:29:00,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:29:00" (3/3) ... [2023-04-01 04:29:00,597 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label52.c [2023-04-01 04:29:00,612 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:29:00,612 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:29:00,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:29:00,660 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;@31f39a45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:29:00,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:29:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:29:00,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:29:00,669 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:29:00,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:29:00,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:29:00,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:29:00,674 INFO L85 PathProgramCache]: Analyzing trace with hash 510739172, now seen corresponding path program 1 times [2023-04-01 04:29:00,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:29:00,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116872313] [2023-04-01 04:29:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:00,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:29:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:00,946 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 04:29:00,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:29:00,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116872313] [2023-04-01 04:29:00,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116872313] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:29:00,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:29:00,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:29:00,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297198494] [2023-04-01 04:29:00,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:29:00,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:29:00,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:29:00,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:29:00,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:29:00,985 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 04:29:02,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:29:02,976 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 04:29:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:29:02,981 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 04:29:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:29:02,995 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 04:29:02,995 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 04:29:03,000 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 04:29:03,002 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 482 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 761 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 761 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:29:03,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 70 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [761 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 04:29:03,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 04:29:03,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 890. [2023-04-01 04:29:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 876 states have (on average 1.9429223744292237) internal successors, (1702), 876 states have internal predecessors, (1702), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 04:29:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1719 transitions. [2023-04-01 04:29:03,076 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1719 transitions. Word has length 11 [2023-04-01 04:29:03,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:29:03,076 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1719 transitions. [2023-04-01 04:29:03,076 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 04:29:03,076 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1719 transitions. [2023-04-01 04:29:03,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 04:29:03,078 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:29:03,078 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] [2023-04-01 04:29:03,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:29:03,078 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:29:03,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:29:03,079 INFO L85 PathProgramCache]: Analyzing trace with hash -2122682947, now seen corresponding path program 1 times [2023-04-01 04:29:03,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:29:03,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040878820] [2023-04-01 04:29:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:03,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:29:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:03,250 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 04:29:03,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:29:03,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040878820] [2023-04-01 04:29:03,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040878820] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:29:03,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:29:03,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:29:03,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144765526] [2023-04-01 04:29:03,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:29:03,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:29:03,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:29:03,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:29:03,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:29:03,253 INFO L87 Difference]: Start difference. First operand 890 states and 1719 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 04:29:05,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:29:05,663 INFO L93 Difference]: Finished difference Result 2709 states and 5256 transitions. [2023-04-01 04:29:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:29:05,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 26 [2023-04-01 04:29:05,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:29:05,674 INFO L225 Difference]: With dead ends: 2709 [2023-04-01 04:29:05,675 INFO L226 Difference]: Without dead ends: 1824 [2023-04-01 04:29:05,681 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 04:29:05,683 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1553 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2836 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1553 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:29:05,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1553 Valid, 91 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2836 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 04:29:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2023-04-01 04:29:05,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1587. [2023-04-01 04:29:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1556 states have (on average 1.6625964010282777) internal successors, (2587), 1561 states have internal predecessors, (2587), 10 states have call successors, (10), 10 states have call predecessors, (10), 20 states have return successors, (48), 15 states have call predecessors, (48), 9 states have call successors, (48) [2023-04-01 04:29:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2645 transitions. [2023-04-01 04:29:05,762 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2645 transitions. Word has length 26 [2023-04-01 04:29:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:29:05,762 INFO L495 AbstractCegarLoop]: Abstraction has 1587 states and 2645 transitions. [2023-04-01 04:29:05,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 04:29:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2645 transitions. [2023-04-01 04:29:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 04:29:05,764 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:29:05,764 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] [2023-04-01 04:29:05,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:29:05,764 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:29:05,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:29:05,765 INFO L85 PathProgramCache]: Analyzing trace with hash 290654271, now seen corresponding path program 1 times [2023-04-01 04:29:05,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:29:05,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816910038] [2023-04-01 04:29:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:05,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:29:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:05,913 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 04:29:05,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:29:05,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816910038] [2023-04-01 04:29:05,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816910038] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:29:05,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705819448] [2023-04-01 04:29:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:05,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:29:05,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:29:05,917 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 04:29:05,925 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 04:29:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:06,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:29:06,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:29:06,107 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 04:29:06,108 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:29:06,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705819448] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:29:06,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:29:06,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:29:06,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120150087] [2023-04-01 04:29:06,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:29:06,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:29:06,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:29:06,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:29:06,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:29:06,109 INFO L87 Difference]: Start difference. First operand 1587 states and 2645 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:29:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:29:08,274 INFO L93 Difference]: Finished difference Result 4838 states and 8232 transitions. [2023-04-01 04:29:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:29:08,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 36 [2023-04-01 04:29:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:29:08,292 INFO L225 Difference]: With dead ends: 4838 [2023-04-01 04:29:08,292 INFO L226 Difference]: Without dead ends: 3256 [2023-04-01 04:29:08,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:29:08,299 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1612 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1612 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:29:08,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1612 Valid, 59 Invalid, 3364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2340 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 04:29:08,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2023-04-01 04:29:08,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 2572. [2023-04-01 04:29:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 2502 states have (on average 1.4548361310951239) internal successors, (3640), 2523 states have internal predecessors, (3640), 15 states have call successors, (15), 15 states have call predecessors, (15), 54 states have return successors, (182), 33 states have call predecessors, (182), 14 states have call successors, (182) [2023-04-01 04:29:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 3837 transitions. [2023-04-01 04:29:08,485 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 3837 transitions. Word has length 36 [2023-04-01 04:29:08,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:29:08,486 INFO L495 AbstractCegarLoop]: Abstraction has 2572 states and 3837 transitions. [2023-04-01 04:29:08,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:29:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 3837 transitions. [2023-04-01 04:29:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 04:29:08,494 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:29:08,494 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 04:29:08,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:29:08,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:29:08,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:29:08,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:29:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash 54699182, now seen corresponding path program 1 times [2023-04-01 04:29:08,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:29:08,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060866537] [2023-04-01 04:29:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:08,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:29:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 04:29:08,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:29:08,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060866537] [2023-04-01 04:29:08,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060866537] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:29:08,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552662683] [2023-04-01 04:29:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:08,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:29:08,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:29:08,909 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 04:29:08,912 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 04:29:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:09,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:29:09,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:29:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:29:09,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:29:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 04:29:09,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552662683] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:29:09,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376958937] [2023-04-01 04:29:09,184 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-04-01 04:29:09,185 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:29:09,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:29:09,190 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:29:09,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:29:09,305 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-01 04:29:09,408 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 04:29:09,444 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5124 conjuctions. This might take some time... [2023-04-01 04:29:09,846 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 588 conjuctions. [2023-04-01 04:29:41,339 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 51