/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:30:09,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:30:09,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:30:09,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:30:09,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:30:09,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:30:09,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:30:09,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:30:09,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:30:09,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:30:09,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:30:09,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:30:09,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:30:09,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:30:09,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:30:09,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:30:09,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:30:09,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:30:09,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:30:09,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:30:09,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:30:09,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:30:09,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:30:09,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:30:09,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:30:09,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:30:09,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:30:09,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:30:09,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:30:09,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:30:09,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:30:09,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:30:09,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:30:09,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:30:09,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:30:09,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:30:09,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:30:09,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:30:09,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:30:09,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:30:09,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:30:09,618 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 04:30:09,636 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:30:09,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:30:09,636 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:30:09,640 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:30:09,641 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:30:09,641 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:30:09,641 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:30:09,641 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:30:09,641 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:30:09,642 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:30:09,642 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:30:09,642 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:30:09,642 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:30:09,643 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:30:09,643 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:30:09,643 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:30:09,643 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:30:09,643 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:30:09,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:30:09,644 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:30:09,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:30:09,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:30:09,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:30:09,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:30:09,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:30:09,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:30:09,645 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:30:09,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:30:09,645 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:30:09,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:30:09,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:30:09,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:30:09,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:30:09,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:30:09,646 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:30:09,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:30:09,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:30:09,646 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:30:09,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:30:09,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:30:09,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:30:09,647 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:30:09,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:30:09,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:30:09,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:30:09,883 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:30:09,883 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:30:09,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label10.c [2023-04-01 04:30:10,946 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:30:11,343 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:30:11,343 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label10.c [2023-04-01 04:30:11,391 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ed79c91/3beb19a370724b6186d574fa8746f81d/FLAGf0cfa3a2a [2023-04-01 04:30:11,405 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ed79c91/3beb19a370724b6186d574fa8746f81d [2023-04-01 04:30:11,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:30:11,408 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:30:11,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:30:11,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:30:11,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:30:11,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:30:11" (1/1) ... [2023-04-01 04:30:11,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b33ef10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:11, skipping insertion in model container [2023-04-01 04:30:11,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:30:11" (1/1) ... [2023-04-01 04:30:11,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:30:11,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:30:11,769 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label10.c[1448,1461] [2023-04-01 04:30:12,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:30:12,661 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:30:12,670 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label10.c[1448,1461] [2023-04-01 04:30:13,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:30:13,191 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:30:13,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13 WrapperNode [2023-04-01 04:30:13,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:30:13,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:30:13,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:30:13,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:30:13,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,463 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:30:13,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:30:13,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:30:13,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:30:13,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (1/1) ... [2023-04-01 04:30:13,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:30:13,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:30:13,561 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 04:30:13,579 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 04:30:13,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:30:13,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:30:13,623 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:30:13,623 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:30:13,623 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:30:13,623 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:30:13,623 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:30:13,623 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 04:30:13,623 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 04:30:13,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:30:13,623 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:30:13,623 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:30:13,623 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:30:13,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:30:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:30:13,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:30:13,699 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:30:13,701 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:30:19,383 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:30:32,597 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:30:32,597 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:30:32,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:30:32 BoogieIcfgContainer [2023-04-01 04:30:32,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:30:32,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:30:32,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:30:32,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:30:32,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:30:11" (1/3) ... [2023-04-01 04:30:32,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@215d7a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:30:32, skipping insertion in model container [2023-04-01 04:30:32,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:13" (2/3) ... [2023-04-01 04:30:32,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@215d7a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:30:32, skipping insertion in model container [2023-04-01 04:30:32,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:30:32" (3/3) ... [2023-04-01 04:30:32,608 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label10.c [2023-04-01 04:30:32,622 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:30:32,622 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:30:32,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:30:32,716 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;@7c8a154, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:30:32,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:30:32,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 04:30:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:30:32,731 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:32,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:30:32,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:32,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:32,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1235539508, now seen corresponding path program 1 times [2023-04-01 04:30:32,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:32,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272624619] [2023-04-01 04:30:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:32,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:32,938 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 04:30:32,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:32,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272624619] [2023-04-01 04:30:32,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272624619] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:32,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:32,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:30:32,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937975681] [2023-04-01 04:30:32,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:32,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:30:32,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:32,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:30:32,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:30:32,967 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:30:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:38,371 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 04:30:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:30:38,373 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 04:30:38,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:38,395 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 04:30:38,395 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 04:30:38,403 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 04:30:38,405 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1265 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 4581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:38,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 737 Invalid, 4581 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1219 Valid, 3362 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-04-01 04:30:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 04:30:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-04-01 04:30:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.6464556397681676) internal successors, (3693), 2243 states have internal predecessors, (3693), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 04:30:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3728 transitions. [2023-04-01 04:30:38,534 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3728 transitions. Word has length 11 [2023-04-01 04:30:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:38,535 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 3728 transitions. [2023-04-01 04:30:38,535 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 04:30:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3728 transitions. [2023-04-01 04:30:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:30:38,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:38,537 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:30:38,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:30:38,537 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:38,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1801328547, now seen corresponding path program 1 times [2023-04-01 04:30:38,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:38,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489517095] [2023-04-01 04:30:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:38,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:38,707 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 04:30:38,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:38,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489517095] [2023-04-01 04:30:38,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489517095] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:38,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:38,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:38,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399561575] [2023-04-01 04:30:38,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:38,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:38,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:38,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:38,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:38,710 INFO L87 Difference]: Start difference. First operand 2269 states and 3728 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:30:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:47,210 INFO L93 Difference]: Finished difference Result 6943 states and 11442 transitions. [2023-04-01 04:30:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:30:47,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-01 04:30:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:47,227 INFO L225 Difference]: With dead ends: 6943 [2023-04-01 04:30:47,227 INFO L226 Difference]: Without dead ends: 4679 [2023-04-01 04:30:47,231 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 04:30:47,232 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 4036 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6593 mSolverCounterSat, 1794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1794 IncrementalHoareTripleChecker+Valid, 6593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:47,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4036 Valid, 181 Invalid, 8387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1794 Valid, 6593 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-04-01 04:30:47,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2023-04-01 04:30:47,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4607. [2023-04-01 04:30:47,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4531 states have (on average 1.414036636504083) internal successors, (6407), 4537 states have internal predecessors, (6407), 23 states have call successors, (23), 23 states have call predecessors, (23), 52 states have return successors, (137), 46 states have call predecessors, (137), 22 states have call successors, (137) [2023-04-01 04:30:47,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 6567 transitions. [2023-04-01 04:30:47,345 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 6567 transitions. Word has length 21 [2023-04-01 04:30:47,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:47,345 INFO L495 AbstractCegarLoop]: Abstraction has 4607 states and 6567 transitions. [2023-04-01 04:30:47,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:30:47,346 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 6567 transitions. [2023-04-01 04:30:47,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:30:47,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:47,346 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:30:47,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:30:47,346 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:47,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:47,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1818981421, now seen corresponding path program 1 times [2023-04-01 04:30:47,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:47,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678180573] [2023-04-01 04:30:47,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:47,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:47,525 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 04:30:47,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:47,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678180573] [2023-04-01 04:30:47,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678180573] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:47,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:47,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:47,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655672854] [2023-04-01 04:30:47,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:47,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:47,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:47,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:47,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:47,530 INFO L87 Difference]: Start difference. First operand 4607 states and 6567 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:30:53,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:53,970 INFO L93 Difference]: Finished difference Result 14148 states and 20540 transitions. [2023-04-01 04:30:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:30:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-04-01 04:30:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:54,007 INFO L225 Difference]: With dead ends: 14148 [2023-04-01 04:30:54,008 INFO L226 Difference]: Without dead ends: 9546 [2023-04-01 04:30:54,020 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 04:30:54,022 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 3495 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7164 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 8265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 7164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:54,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 175 Invalid, 8265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 7164 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-04-01 04:30:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2023-04-01 04:30:54,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8592. [2023-04-01 04:30:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8362 states have (on average 1.4227457546041617) internal successors, (11897), 8395 states have internal predecessors, (11897), 40 states have call successors, (40), 40 states have call predecessors, (40), 189 states have return successors, (602), 156 states have call predecessors, (602), 39 states have call successors, (602) [2023-04-01 04:30:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 12539 transitions. [2023-04-01 04:30:54,201 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 12539 transitions. Word has length 23 [2023-04-01 04:30:54,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:54,202 INFO L495 AbstractCegarLoop]: Abstraction has 8592 states and 12539 transitions. [2023-04-01 04:30:54,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:30:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 12539 transitions. [2023-04-01 04:30:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 04:30:54,203 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:54,203 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:30:54,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:30:54,204 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:54,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:54,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1493700963, now seen corresponding path program 1 times [2023-04-01 04:30:54,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:54,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459910168] [2023-04-01 04:30:54,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:54,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:54,292 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 04:30:54,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:54,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459910168] [2023-04-01 04:30:54,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459910168] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:54,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:54,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:54,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923384583] [2023-04-01 04:30:54,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:54,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:54,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:54,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:54,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:54,295 INFO L87 Difference]: Start difference. First operand 8592 states and 12539 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:31:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:31:01,300 INFO L93 Difference]: Finished difference Result 26245 states and 39095 transitions. [2023-04-01 04:31:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:31:01,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-04-01 04:31:01,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:31:01,349 INFO L225 Difference]: With dead ends: 26245 [2023-04-01 04:31:01,350 INFO L226 Difference]: Without dead ends: 17658 [2023-04-01 04:31:01,362 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 04:31:01,362 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 5995 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6471 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5995 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 7174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 6471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:31:01,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5995 Valid, 147 Invalid, 7174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 6471 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-04-01 04:31:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17658 states. [2023-04-01 04:31:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17658 to 17126. [2023-04-01 04:31:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17126 states, 16569 states have (on average 1.3635705232663407) internal successors, (22593), 16669 states have internal predecessors, (22593), 76 states have call successors, (76), 76 states have call predecessors, (76), 480 states have return successors, (1564), 380 states have call predecessors, (1564), 75 states have call successors, (1564) [2023-04-01 04:31:01,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17126 states to 17126 states and 24233 transitions. [2023-04-01 04:31:01,694 INFO L78 Accepts]: Start accepts. Automaton has 17126 states and 24233 transitions. Word has length 33 [2023-04-01 04:31:01,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:31:01,694 INFO L495 AbstractCegarLoop]: Abstraction has 17126 states and 24233 transitions. [2023-04-01 04:31:01,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:31:01,695 INFO L276 IsEmpty]: Start isEmpty. Operand 17126 states and 24233 transitions. [2023-04-01 04:31:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 04:31:01,698 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:31:01,699 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:31:01,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:31:01,699 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:31:01,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:31:01,699 INFO L85 PathProgramCache]: Analyzing trace with hash -715768964, now seen corresponding path program 1 times [2023-04-01 04:31:01,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:31:01,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135956583] [2023-04-01 04:31:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:01,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:31:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:01,867 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 04:31:01,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:31:01,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135956583] [2023-04-01 04:31:01,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135956583] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:31:01,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109322026] [2023-04-01 04:31:01,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:01,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:31:01,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:31:01,870 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 04:31:01,875 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 04:31:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:01,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:31:01,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:31:02,076 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 04:31:02,080 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:31:02,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109322026] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:31:02,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:31:02,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:31:02,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459308752] [2023-04-01 04:31:02,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:31:02,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:31:02,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:31:02,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:31:02,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:31:02,082 INFO L87 Difference]: Start difference. First operand 17126 states and 24233 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)