/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:21:02,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:21:02,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:21:02,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 15:21:02,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 15:21:02,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 15:21:02,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 15:21:02,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 15:21:02,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 15:21:02,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 15:21:02,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 15:21:02,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 15:21:02,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:21:02,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:21:02,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:21:02,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:21:02,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:21:02,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:21:02,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:21:02,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:21:02,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:21:02,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:21:02,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:21:02,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:21:02,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 15:21:02,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 15:21:02,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 15:21:02,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 15:21:02,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 15:21:02,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 15:21:02,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 15:21:02,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 15:21:02,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 15:21:02,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 15:21:02,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 15:21:02,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 15:21:02,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 15:21:02,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 15:21:02,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:21:02,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:21:02,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:21:02,565 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:21:02,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:21:02,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:21:02,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:21:02,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:21:02,601 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:21:02,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:21:02,601 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:21:02,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:21:02,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:21:02,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:21:02,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:21:02,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:21:02,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:21:02,602 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:21:02,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:21:02,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:21:02,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:21:02,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:21:02,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:21:02,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:21:02,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:21:02,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:21:02,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:21:02,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:21:02,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:21:02,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:21:02,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:21:02,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:21:02,604 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:21:02,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:21:02,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:21:02,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:21:02,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:21:02,902 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:21:02,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound1.c [2021-05-02 15:21:02,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7408dbdfd/0689fcd70e924a8699d280488614d4dd/FLAG713aa8a84 [2021-05-02 15:21:03,325 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:21:03,325 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound1.c [2021-05-02 15:21:03,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7408dbdfd/0689fcd70e924a8699d280488614d4dd/FLAG713aa8a84 [2021-05-02 15:21:03,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7408dbdfd/0689fcd70e924a8699d280488614d4dd [2021-05-02 15:21:03,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:21:03,355 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:21:03,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:21:03,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:21:03,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:21:03,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:21:03" (1/1) ... [2021-05-02 15:21:03,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29c3141c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:03, skipping insertion in model container [2021-05-02 15:21:03,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:21:03" (1/1) ... [2021-05-02 15:21:03,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:21:03,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:21:03,530 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound1.c[546,559] [2021-05-02 15:21:03,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:21:03,554 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:21:03,579 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound1.c[546,559] [2021-05-02 15:21:03,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:21:03,625 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:21:03,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:03 WrapperNode [2021-05-02 15:21:03,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:21:03,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:21:03,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:21:03,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:21:03,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:03" (1/1) ... [2021-05-02 15:21:03,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:03" (1/1) ... [2021-05-02 15:21:03,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:03" (1/1) ... [2021-05-02 15:21:03,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:03" (1/1) ... [2021-05-02 15:21:03,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:03" (1/1) ... [2021-05-02 15:21:03,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:03" (1/1) ... [2021-05-02 15:21:03,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:03" (1/1) ... [2021-05-02 15:21:03,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:21:03,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:21:03,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:21:03,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:21:03,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:21:03,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:21:03,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:21:03,730 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:21:03,730 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:21:03,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:21:03,731 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:21:03,731 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:21:03,731 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:21:03,731 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:21:03,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:21:03,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:21:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:21:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:21:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:21:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:21:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:21:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:21:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:21:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:21:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:21:03,965 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:21:03,965 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:21:03,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:21:03 BoogieIcfgContainer [2021-05-02 15:21:03,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:21:03,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:21:03,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:21:03,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:21:03,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:21:03" (1/3) ... [2021-05-02 15:21:03,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d6e5a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:21:03, skipping insertion in model container [2021-05-02 15:21:03,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:03" (2/3) ... [2021-05-02 15:21:03,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d6e5a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:21:03, skipping insertion in model container [2021-05-02 15:21:03,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:21:03" (3/3) ... [2021-05-02 15:21:03,971 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_valuebound1.c [2021-05-02 15:21:03,992 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:21:03,995 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:21:04,008 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:21:04,027 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:21:04,027 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:21:04,027 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:21:04,027 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:21:04,028 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:21:04,028 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:21:04,028 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:21:04,028 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:21:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:21:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:21:04,053 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:04,053 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:04,054 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:04,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:04,064 INFO L82 PathProgramCache]: Analyzing trace with hash 774216096, now seen corresponding path program 1 times [2021-05-02 15:21:04,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:04,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305078993] [2021-05-02 15:21:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:04,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:21:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:04,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:21:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:04,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:21:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:04,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:21:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:04,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:21:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:21:04,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:04,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305078993] [2021-05-02 15:21:04,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305078993] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:21:04,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:21:04,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:21:04,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441351008] [2021-05-02 15:21:04,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:21:04,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:04,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:21:04,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:21:04,338 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:21:04,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:04,465 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2021-05-02 15:21:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:21:04,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:21:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:04,473 INFO L225 Difference]: With dead ends: 57 [2021-05-02 15:21:04,473 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:21:04,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:21:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:21:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:21:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:21:04,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 15:21:04,517 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2021-05-02 15:21:04,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:04,517 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 15:21:04,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:21:04,518 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 15:21:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:21:04,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:04,520 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:04,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:21:04,521 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:04,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1105237916, now seen corresponding path program 1 times [2021-05-02 15:21:04,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:04,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174728464] [2021-05-02 15:21:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:04,552 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:04,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001777241] [2021-05-02 15:21:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:04,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 15:21:04,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:04,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:04,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:04,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:04,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:04,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:04,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:04,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:04,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:21:04,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:04,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174728464] [2021-05-02 15:21:04,924 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:04,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001777241] [2021-05-02 15:21:04,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001777241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:04,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:04,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:21:04,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378681400] [2021-05-02 15:21:04,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:21:04,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:04,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:21:04,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:21:04,927 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:21:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:05,068 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-02 15:21:05,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:21:05,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-02 15:21:05,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:05,076 INFO L225 Difference]: With dead ends: 37 [2021-05-02 15:21:05,076 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:21:05,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:21:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:21:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 15:21:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:21:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-05-02 15:21:05,095 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 33 [2021-05-02 15:21:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:05,097 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-05-02 15:21:05,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:21:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-05-02 15:21:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 15:21:05,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:05,098 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-02 15:21:05,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:21:05,312 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:05,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:05,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1493430927, now seen corresponding path program 1 times [2021-05-02 15:21:05,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:05,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448364991] [2021-05-02 15:21:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:05,337 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:05,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270706511] [2021-05-02 15:21:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:05,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:21:05,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:05,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:05,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:05,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:05,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:05,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:05,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:05,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:05,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:05,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:05,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:21:05,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:05,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448364991] [2021-05-02 15:21:05,779 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:05,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270706511] [2021-05-02 15:21:05,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270706511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:05,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:05,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:21:05,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112248177] [2021-05-02 15:21:05,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:21:05,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:05,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:21:05,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:21:05,782 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:21:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:05,922 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-02 15:21:05,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:21:05,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-02 15:21:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:05,924 INFO L225 Difference]: With dead ends: 42 [2021-05-02 15:21:05,924 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 15:21:05,925 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:21:05,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 15:21:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 15:21:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:21:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 15:21:05,931 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 40 [2021-05-02 15:21:05,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:05,931 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 15:21:05,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:21:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 15:21:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 15:21:05,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:05,932 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-02 15:21:06,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:06,153 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1541394437, now seen corresponding path program 1 times [2021-05-02 15:21:06,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:06,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965490125] [2021-05-02 15:21:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:06,170 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:06,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132355763] [2021-05-02 15:21:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:06,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:21:06,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:06,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:06,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:06,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:06,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:06,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:06,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:06,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:06,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:06,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:06,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:06,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:21:06,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:06,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965490125] [2021-05-02 15:21:06,321 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:06,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132355763] [2021-05-02 15:21:06,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132355763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:06,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:06,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:21:06,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54147480] [2021-05-02 15:21:06,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:21:06,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:06,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:21:06,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:21:06,323 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:21:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:06,356 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 15:21:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:21:06,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-05-02 15:21:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:06,357 INFO L225 Difference]: With dead ends: 34 [2021-05-02 15:21:06,357 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:21:06,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:21:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:21:06,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:21:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 15:21:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:21:06,362 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2021-05-02 15:21:06,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:06,362 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:21:06,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:21:06,362 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:21:06,362 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:21:06,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:06,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:21:06,897 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 9) no Hoare annotation was computed. [2021-05-02 15:21:06,898 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 9) no Hoare annotation was computed. [2021-05-02 15:21:06,898 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 9) no Hoare annotation was computed. [2021-05-02 15:21:06,901 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:21:06,901 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 15:21:06,902 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:21:06,902 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:21:06,902 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:21:06,902 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:21:06,902 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:21:06,902 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 12 14) the Hoare annotation is: true [2021-05-02 15:21:06,902 INFO L198 CegarLoopUtils]: For program point L13(line 13) no Hoare annotation was computed. [2021-05-02 15:21:06,902 INFO L198 CegarLoopUtils]: For program point L13-2(lines 12 14) no Hoare annotation was computed. [2021-05-02 15:21:06,903 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2021-05-02 15:21:06,903 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (<= main_~k~0 1) (<= main_~z~0 1) (<= 0 main_~k~0) (<= 1 main_~z~0)) [2021-05-02 15:21:06,903 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 52) no Hoare annotation was computed. [2021-05-02 15:21:06,903 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (and (<= main_~z~0 1) (<= 0 main_~x~0) (<= 1 main_~z~0) (<= main_~x~0 0) (= (+ main_~x~0 1) main_~y~0)) [2021-05-02 15:21:06,904 INFO L198 CegarLoopUtils]: For program point L50-1(line 50) no Hoare annotation was computed. [2021-05-02 15:21:06,904 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 52) no Hoare annotation was computed. [2021-05-02 15:21:06,904 INFO L194 CegarLoopUtils]: At program point L36-2(lines 36 46) the Hoare annotation is: (and (<= 1 main_~c~0) (<= main_~k~0 1) (<= main_~z~0 1) (<= 0 main_~k~0) (<= 1 main_~z~0) (= main_~x~0 1) (= main_~z~0 main_~y~0)) [2021-05-02 15:21:06,904 INFO L198 CegarLoopUtils]: For program point L36-3(lines 36 46) no Hoare annotation was computed. [2021-05-02 15:21:06,904 INFO L198 CegarLoopUtils]: For program point L30(line 30) no Hoare annotation was computed. [2021-05-02 15:21:06,904 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 52) the Hoare annotation is: true [2021-05-02 15:21:06,904 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (and (<= main_~z~0 1) (<= 0 main_~z~0)) [2021-05-02 15:21:06,904 INFO L194 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: (and (<= main_~k~0 1) (<= main_~z~0 1) (<= 0 main_~k~0) (<= 0 main_~z~0)) [2021-05-02 15:21:06,904 INFO L201 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-05-02 15:21:06,905 INFO L198 CegarLoopUtils]: For program point L26-1(line 26) no Hoare annotation was computed. [2021-05-02 15:21:06,905 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (and (<= 1 main_~c~0) (<= main_~k~0 1) (<= main_~z~0 1) (<= 0 main_~k~0) (<= 1 main_~z~0) (= main_~x~0 1) (= main_~z~0 main_~y~0)) [2021-05-02 15:21:06,906 INFO L198 CegarLoopUtils]: For program point L37-1(lines 36 46) no Hoare annotation was computed. [2021-05-02 15:21:06,906 INFO L198 CegarLoopUtils]: For program point L17(lines 17 18) no Hoare annotation was computed. [2021-05-02 15:21:06,906 INFO L198 CegarLoopUtils]: For program point L16(lines 16 19) no Hoare annotation was computed. [2021-05-02 15:21:06,906 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 15 21) the Hoare annotation is: true [2021-05-02 15:21:06,906 INFO L198 CegarLoopUtils]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2021-05-02 15:21:06,906 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2021-05-02 15:21:06,906 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-05-02 15:21:06,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:21:06 BoogieIcfgContainer [2021-05-02 15:21:06,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:21:06,916 INFO L168 Benchmark]: Toolchain (without parser) took 3561.93 ms. Allocated memory was 191.9 MB in the beginning and 252.7 MB in the end (delta: 60.8 MB). Free memory was 155.9 MB in the beginning and 183.0 MB in the end (delta: -27.0 MB). Peak memory consumption was 91.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:06,917 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 191.9 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:21:06,917 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.05 ms. Allocated memory is still 191.9 MB. Free memory was 155.7 MB in the beginning and 175.0 MB in the end (delta: -19.3 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:06,917 INFO L168 Benchmark]: Boogie Preprocessor took 34.94 ms. Allocated memory is still 191.9 MB. Free memory was 175.0 MB in the beginning and 173.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:06,917 INFO L168 Benchmark]: RCFGBuilder took 303.02 ms. Allocated memory is still 191.9 MB. Free memory was 173.5 MB in the beginning and 158.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:06,917 INFO L168 Benchmark]: TraceAbstraction took 2948.70 ms. Allocated memory was 191.9 MB in the beginning and 252.7 MB in the end (delta: 60.8 MB). Free memory was 157.7 MB in the beginning and 183.0 MB in the end (delta: -25.2 MB). Peak memory consumption was 93.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:06,917 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 191.9 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.05 ms. Allocated memory is still 191.9 MB. Free memory was 155.7 MB in the beginning and 175.0 MB in the end (delta: -19.3 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.94 ms. Allocated memory is still 191.9 MB. Free memory was 175.0 MB in the beginning and 173.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 303.02 ms. Allocated memory is still 191.9 MB. Free memory was 173.5 MB in the beginning and 158.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2948.70 ms. Allocated memory was 191.9 MB in the beginning and 252.7 MB in the end (delta: 60.8 MB). Free memory was 157.7 MB in the beginning and 183.0 MB in the end (delta: -25.2 MB). Peak memory consumption was 93.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2552.0ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 12.4ms, AutomataDifference: 482.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 319.9ms, InitialAbstractionConstructionTime: 15.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 89 SDtfs, 71 SDslu, 248 SDs, 0 SdLazy, 225 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 226.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 328.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=3, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.6ms AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 13 LocationsWithAnnotation, 24 PreInvPairs, 30 NumberOfFragments, 132 HoareAnnotationTreeSize, 24 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 85.3ms HoareSimplificationTime, 13 FomulaSimplificationsInter, 308 FormulaSimplificationTreeSizeReductionInter, 221.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 84.2ms SsaConstructionTime, 115.4ms SatisfiabilityAnalysisTime, 864.2ms InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 416 SizeOfPredicates, 10 NumberOfNonLiveVariables, 428 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 77/102 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((1 <= c && k <= 1) && z <= 1) && 0 <= k) && 1 <= z) && x == 1) && z == y RESULT: Ultimate proved your program to be correct! Received shutdown request...