/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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 20:25:05,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 20:25:05,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 20:25:05,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 20:25:05,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 20:25:05,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 20:25:05,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 20:25:05,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 20:25:05,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 20:25:05,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 20:25:05,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 20:25:05,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 20:25:05,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 20:25:05,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 20:25:05,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 20:25:05,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 20:25:05,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 20:25:05,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 20:25:05,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 20:25:05,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 20:25:05,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 20:25:05,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 20:25:05,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 20:25:05,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 20:25:05,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 20:25:05,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 20:25:05,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 20:25:05,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 20:25:05,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 20:25:05,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 20:25:05,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 20:25:05,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 20:25:05,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 20:25:05,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 20:25:05,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 20:25:05,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 20:25:05,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 20:25:05,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 20:25:05,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 20:25:05,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 20:25:05,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 20:25:05,642 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 [2023-04-02 20:25:05,668 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 20:25:05,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 20:25:05,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 20:25:05,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 20:25:05,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 20:25:05,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 20:25:05,670 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 20:25:05,670 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 20:25:05,670 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 20:25:05,670 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 20:25:05,670 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 20:25:05,671 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 20:25:05,671 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 20:25:05,671 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 20:25:05,671 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 20:25:05,671 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 20:25:05,671 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 20:25:05,671 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 20:25:05,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 20:25:05,672 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 20:25:05,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 20:25:05,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 20:25:05,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 20:25:05,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 20:25:05,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 20:25:05,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 20:25:05,672 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 20:25:05,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 20:25:05,672 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 20:25:05,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 20:25:05,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 20:25:05,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 20:25:05,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:25:05,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 20:25:05,673 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 20:25:05,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 20:25:05,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 20:25:05,673 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 20:25:05,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 20:25:05,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 20:25:05,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 20:25:05,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 20:25:05,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 20:25:05,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 20:25:05,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 20:25:05,893 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 20:25:05,894 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 20:25:05,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label02.c [2023-04-02 20:25:06,868 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 20:25:07,217 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 20:25:07,217 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label02.c [2023-04-02 20:25:07,239 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd48c3216/03572474086a4745957c8c9d87803259/FLAG3f6c72098 [2023-04-02 20:25:07,253 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd48c3216/03572474086a4745957c8c9d87803259 [2023-04-02 20:25:07,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 20:25:07,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 20:25:07,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 20:25:07,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 20:25:07,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 20:25:07,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:25:07" (1/1) ... [2023-04-02 20:25:07,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@282eb5ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:25:07, skipping insertion in model container [2023-04-02 20:25:07,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:25:07" (1/1) ... [2023-04-02 20:25:07,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 20:25:07,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 20:25:07,536 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_label02.c[6350,6363] [2023-04-02 20:25:08,075 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:25:08,084 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 20:25:08,105 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_label02.c[6350,6363] [2023-04-02 20:25:08,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:25:08,294 INFO L208 MainTranslator]: Completed translation [2023-04-02 20:25:08,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:25:08 WrapperNode [2023-04-02 20:25:08,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 20:25:08,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 20:25:08,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 20:25:08,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 20:25:08,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:25:08" (1/1) ... [2023-04-02 20:25:08,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:25:08" (1/1) ... [2023-04-02 20:25:08,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:25:08" (1/1) ... [2023-04-02 20:25:08,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:25:08" (1/1) ... [2023-04-02 20:25:08,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:25:08" (1/1) ... [2023-04-02 20:25:08,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:25:08" (1/1) ... [2023-04-02 20:25:08,452 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:25:08" (1/1) ... [2023-04-02 20:25:08,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:25:08" (1/1) ... [2023-04-02 20:25:08,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 20:25:08,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 20:25:08,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 20:25:08,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 20:25:08,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:25:08" (1/1) ... [2023-04-02 20:25:08,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:25:08,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:25:08,578 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) [2023-04-02 20:25:08,597 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 [2023-04-02 20:25:08,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 20:25:08,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 20:25:08,611 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 20:25:08,611 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 20:25:08,611 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 20:25:08,611 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 20:25:08,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 20:25:08,611 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 20:25:08,611 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 20:25:08,611 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 20:25:08,611 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 20:25:08,611 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 20:25:08,611 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 20:25:08,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 20:25:08,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 20:25:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 20:25:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 20:25:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 20:25:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 20:25:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 20:25:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 20:25:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 20:25:08,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 20:25:08,671 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 20:25:08,672 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 20:25:10,905 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 20:25:17,104 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 20:25:17,104 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 20:25:17,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:25:17 BoogieIcfgContainer [2023-04-02 20:25:17,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 20:25:17,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 20:25:17,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 20:25:17,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 20:25:17,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 08:25:07" (1/3) ... [2023-04-02 20:25:17,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f7ee06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:25:17, skipping insertion in model container [2023-04-02 20:25:17,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:25:08" (2/3) ... [2023-04-02 20:25:17,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f7ee06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:25:17, skipping insertion in model container [2023-04-02 20:25:17,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:25:17" (3/3) ... [2023-04-02 20:25:17,112 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label02.c [2023-04-02 20:25:17,140 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 20:25:17,140 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 20:25:17,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 20:25:17,221 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;@5f3b5d25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 20:25:17,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 20:25:17,227 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) [2023-04-02 20:25:17,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 20:25:17,233 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:25:17,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:25:17,234 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:25:17,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:25:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash 314329443, now seen corresponding path program 1 times [2023-04-02 20:25:17,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:25:17,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572140734] [2023-04-02 20:25:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:25:17,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:25:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:25:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:25:17,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:25:17,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572140734] [2023-04-02 20:25:17,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572140734] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:25:17,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:25:17,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:25:17,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095275108] [2023-04-02 20:25:17,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:25:17,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:25:17,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:25:17,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:25:17,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:25:17,554 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) [2023-04-02 20:25:19,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:25:19,439 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-02 20:25:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:25:19,444 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 [2023-04-02 20:25:19,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:25:19,460 INFO L225 Difference]: With dead ends: 1393 [2023-04-02 20:25:19,460 INFO L226 Difference]: Without dead ends: 921 [2023-04-02 20:25:19,466 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 [2023-04-02 20:25:19,468 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 482 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 761 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 20:25:19,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 70 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [761 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 20:25:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-02 20:25:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 890. [2023-04-02 20:25:19,535 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) [2023-04-02 20:25:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1719 transitions. [2023-04-02 20:25:19,539 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1719 transitions. Word has length 11 [2023-04-02 20:25:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:25:19,539 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1719 transitions. [2023-04-02 20:25:19,540 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) [2023-04-02 20:25:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1719 transitions. [2023-04-02 20:25:19,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 20:25:19,541 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:25:19,541 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] [2023-04-02 20:25:19,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 20:25:19,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:25:19,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:25:19,542 INFO L85 PathProgramCache]: Analyzing trace with hash 45103750, now seen corresponding path program 1 times [2023-04-02 20:25:19,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:25:19,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899837605] [2023-04-02 20:25:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:25:19,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:25:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:25:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:25:19,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:25:19,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899837605] [2023-04-02 20:25:19,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899837605] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:25:19,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:25:19,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:25:19,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603840380] [2023-04-02 20:25:19,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:25:19,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:25:19,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:25:19,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:25:19,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:25:19,681 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) [2023-04-02 20:25:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:25:22,486 INFO L93 Difference]: Finished difference Result 2711 states and 5257 transitions. [2023-04-02 20:25:22,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 20:25:22,488 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 [2023-04-02 20:25:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:25:22,496 INFO L225 Difference]: With dead ends: 2711 [2023-04-02 20:25:22,496 INFO L226 Difference]: Without dead ends: 1826 [2023-04-02 20:25:22,498 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 [2023-04-02 20:25:22,499 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1555 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 2838 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1555 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 3387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 2838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 20:25:22,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1555 Valid, 93 Invalid, 3387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 2838 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 20:25:22,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2023-04-02 20:25:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1587. [2023-04-02 20:25:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1556 states have (on average 1.6632390745501284) internal successors, (2588), 1561 states have internal predecessors, (2588), 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) [2023-04-02 20:25:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2646 transitions. [2023-04-02 20:25:22,617 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2646 transitions. Word has length 26 [2023-04-02 20:25:22,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:25:22,618 INFO L495 AbstractCegarLoop]: Abstraction has 1587 states and 2646 transitions. [2023-04-02 20:25:22,618 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) [2023-04-02 20:25:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2646 transitions. [2023-04-02 20:25:22,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 20:25:22,620 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:25:22,620 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] [2023-04-02 20:25:22,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 20:25:22,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:25:22,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:25:22,621 INFO L85 PathProgramCache]: Analyzing trace with hash -759082960, now seen corresponding path program 1 times [2023-04-02 20:25:22,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:25:22,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846821761] [2023-04-02 20:25:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:25:22,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:25:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:25:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 20:25:22,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:25:22,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846821761] [2023-04-02 20:25:22,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846821761] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:25:22,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091317864] [2023-04-02 20:25:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:25:22,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:25:22,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:25:22,843 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) [2023-04-02 20:25:22,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 20:25:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:25:22,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 20:25:22,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:25:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 20:25:23,010 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 20:25:23,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091317864] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:25:23,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 20:25:23,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 20:25:23,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538602137] [2023-04-02 20:25:23,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:25:23,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:25:23,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:25:23,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:25:23,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 20:25:23,012 INFO L87 Difference]: Start difference. First operand 1587 states and 2646 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) [2023-04-02 20:25:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:25:25,110 INFO L93 Difference]: Finished difference Result 4838 states and 8235 transitions. [2023-04-02 20:25:25,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:25:25,110 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 [2023-04-02 20:25:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:25:25,136 INFO L225 Difference]: With dead ends: 4838 [2023-04-02 20:25:25,137 INFO L226 Difference]: Without dead ends: 3256 [2023-04-02 20:25:25,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-02 20:25:25,144 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1612 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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 [2023-04-02 20:25:25,146 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] [2023-04-02 20:25:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2023-04-02 20:25:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 2578. [2023-04-02 20:25:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2507 states have (on average 1.4547267650578382) internal successors, (3647), 2527 states have internal predecessors, (3647), 16 states have call successors, (16), 16 states have call predecessors, (16), 54 states have return successors, (188), 34 states have call predecessors, (188), 15 states have call successors, (188) [2023-04-02 20:25:25,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 3851 transitions. [2023-04-02 20:25:25,236 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 3851 transitions. Word has length 36 [2023-04-02 20:25:25,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:25:25,236 INFO L495 AbstractCegarLoop]: Abstraction has 2578 states and 3851 transitions. [2023-04-02 20:25:25,236 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) [2023-04-02 20:25:25,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 3851 transitions. [2023-04-02 20:25:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-02 20:25:25,244 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:25:25,244 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] [2023-04-02 20:25:25,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 20:25:25,449 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 [2023-04-02 20:25:25,450 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:25:25,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:25:25,451 INFO L85 PathProgramCache]: Analyzing trace with hash -911385579, now seen corresponding path program 1 times [2023-04-02 20:25:25,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:25:25,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253357900] [2023-04-02 20:25:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:25:25,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:25:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:25:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 20:25:25,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:25:25,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253357900] [2023-04-02 20:25:25,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253357900] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:25:25,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102455602] [2023-04-02 20:25:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:25:25,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:25:25,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:25:25,781 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) [2023-04-02 20:25:25,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 20:25:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:25:25,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 20:25:25,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:25:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 20:25:25,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 20:25:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 20:25:26,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102455602] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 20:25:26,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [63188313] [2023-04-02 20:25:26,055 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-04-02 20:25:26,055 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 20:25:26,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 20:25:26,062 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 20:25:26,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 20:25:26,207 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-02 20:25:26,378 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 55 [2023-04-02 20:25:44,275 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 145314 conjuctions. This might take some time... [2023-04-02 20:25:55,550 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 654 conjuctions. [2023-04-02 20:25:57,968 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 20:25:58,188 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 82082 conjuctions. This might take some time... [2023-04-02 20:26:51,860 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 7150 conjuctions. [2023-04-02 20:26:59,794 WARN L223 SmtUtils]: Spent 7.59s on a formula simplification that was a NOOP. DAG size: 799 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 20:27:39,534 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 28938 conjuctions. This might take some time... [2023-04-02 20:28:18,034 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 28938 conjuctions.