/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/ps2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:51:20,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:51:20,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:51:20,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:51:20,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:51:20,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:51:20,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:51:20,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:51:20,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:51:20,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:51:20,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:51:20,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:51:20,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:51:20,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:51:20,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:51:20,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:51:20,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:51:20,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:51:20,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:51:20,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:51:20,683 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 13:51:20,708 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:51:20,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:51:20,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:51:20,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:51:20,711 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:51:20,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:51:20,711 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:51:20,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:51:20,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:51:20,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:51:20,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:51:20,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:51:20,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:51:20,712 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:51:20,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:51:20,712 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:51:20,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:51:20,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:51:20,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:51:20,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:51:20,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:51:20,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:51:20,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:51:20,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:51:20,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:51:20,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:51:20,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:51:20,714 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:51:20,714 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:51:20,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:51:20,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:51:20,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:51:20,978 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:51:20,978 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:51:20,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2-ll.c [2021-05-02 13:51:21,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eec1e002/45d7723fdbe64724baa8caf023f89fae/FLAG0c7bcadcf [2021-05-02 13:51:21,462 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:51:21,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2-ll.c [2021-05-02 13:51:21,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eec1e002/45d7723fdbe64724baa8caf023f89fae/FLAG0c7bcadcf [2021-05-02 13:51:21,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eec1e002/45d7723fdbe64724baa8caf023f89fae [2021-05-02 13:51:21,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:51:21,508 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:51:21,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:51:21,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:51:21,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:51:21,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:51:21" (1/1) ... [2021-05-02 13:51:21,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72d97a45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:21, skipping insertion in model container [2021-05-02 13:51:21,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:51:21" (1/1) ... [2021-05-02 13:51:21,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:51:21,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:51:21,643 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/ps2-ll.c[454,467] [2021-05-02 13:51:21,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:51:21,659 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:51:21,667 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/ps2-ll.c[454,467] [2021-05-02 13:51:21,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:51:21,682 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:51:21,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:21 WrapperNode [2021-05-02 13:51:21,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:51:21,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:51:21,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:51:21,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:51:21,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:21" (1/1) ... [2021-05-02 13:51:21,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:21" (1/1) ... [2021-05-02 13:51:21,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:21" (1/1) ... [2021-05-02 13:51:21,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:21" (1/1) ... [2021-05-02 13:51:21,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:21" (1/1) ... [2021-05-02 13:51:21,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:21" (1/1) ... [2021-05-02 13:51:21,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:21" (1/1) ... [2021-05-02 13:51:21,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:51:21,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:51:21,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:51:21,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:51:21,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:21" (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 13:51:21,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:51:21,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:51:21,833 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:51:21,834 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:51:21,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:51:21,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:51:21,834 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:51:21,834 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:51:21,835 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:51:21,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:51:21,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:51:21,835 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:51:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:51:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:51:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:51:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:51:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:51:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:51:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:51:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:51:21,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:51:21,974 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:51:21,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:51:21 BoogieIcfgContainer [2021-05-02 13:51:21,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:51:21,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:51:21,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:51:21,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:51:21,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:51:21" (1/3) ... [2021-05-02 13:51:21,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d089c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:51:21, skipping insertion in model container [2021-05-02 13:51:21,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:21" (2/3) ... [2021-05-02 13:51:21,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d089c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:51:21, skipping insertion in model container [2021-05-02 13:51:21,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:51:21" (3/3) ... [2021-05-02 13:51:21,979 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll.c [2021-05-02 13:51:21,983 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:51:21,985 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:51:22,012 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:51:22,025 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:51:22,025 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:51:22,025 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:51:22,025 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:51:22,026 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:51:22,026 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:51:22,026 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:51:22,026 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:51:22,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:51:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:51:22,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:22,057 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:22,058 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:22,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1469283919, now seen corresponding path program 1 times [2021-05-02 13:51:22,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:22,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820558964] [2021-05-02 13:51:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:22,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:51:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:22,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:22,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820558964] [2021-05-02 13:51:22,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820558964] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:51:22,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:51:22,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:51:22,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874313081] [2021-05-02 13:51:22,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:51:22,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:22,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:51:22,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:51:22,294 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:51:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:22,343 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-05-02 13:51:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:51:22,344 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), 3 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 [2021-05-02 13:51:22,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:22,349 INFO L225 Difference]: With dead ends: 36 [2021-05-02 13:51:22,349 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 13:51:22,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:51:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 13:51:22,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 13:51:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:51:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-02 13:51:22,381 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-05-02 13:51:22,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:22,382 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-02 13:51:22,382 INFO L481 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), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:51:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-02 13:51:22,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:51:22,383 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:22,383 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:22,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:51:22,383 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:22,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1467496459, now seen corresponding path program 1 times [2021-05-02 13:51:22,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:22,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284985743] [2021-05-02 13:51:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:22,409 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:22,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546038563] [2021-05-02 13:51:22,410 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 13:51:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:22,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:51:22,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:22,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:22,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284985743] [2021-05-02 13:51:22,551 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:22,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546038563] [2021-05-02 13:51:22,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546038563] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:51:22,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:51:22,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 13:51:22,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157846237] [2021-05-02 13:51:22,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 13:51:22,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:22,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 13:51:22,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:51:22,557 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2021-05-02 13:51:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:22,608 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-02 13:51:22,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:51:22,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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 [2021-05-02 13:51:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:22,610 INFO L225 Difference]: With dead ends: 26 [2021-05-02 13:51:22,610 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 13:51:22,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:51:22,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 13:51:22,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 13:51:22,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:51:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-02 13:51:22,616 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2021-05-02 13:51:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:22,616 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-02 13:51:22,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2021-05-02 13:51:22,617 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-02 13:51:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 13:51:22,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:22,617 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:22,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:51:22,833 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:22,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:22,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1366100723, now seen corresponding path program 1 times [2021-05-02 13:51:22,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:22,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589974338] [2021-05-02 13:51:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:22,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:22,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119213446] [2021-05-02 13:51:22,851 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 13:51:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:22,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:51:22,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:22,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:22,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589974338] [2021-05-02 13:51:22,970 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:22,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119213446] [2021-05-02 13:51:22,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119213446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:22,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:22,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:51:22,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814400484] [2021-05-02 13:51:22,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:51:22,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:22,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:51:22,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:51:22,972 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:51:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:23,025 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-05-02 13:51:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:51:23,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 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 18 [2021-05-02 13:51:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:23,026 INFO L225 Difference]: With dead ends: 33 [2021-05-02 13:51:23,026 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 13:51:23,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:51:23,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 13:51:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 13:51:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:51:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-05-02 13:51:23,031 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-05-02 13:51:23,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:23,032 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-05-02 13:51:23,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:51:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-05-02 13:51:23,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 13:51:23,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:23,032 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:23,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:23,248 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:23,249 INFO L82 PathProgramCache]: Analyzing trace with hash 673668341, now seen corresponding path program 2 times [2021-05-02 13:51:23,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:23,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139945536] [2021-05-02 13:51:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:23,255 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:23,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895969992] [2021-05-02 13:51:23,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 13:51:23,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:51:23,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:51:23,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:51:23,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:51:23,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:23,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139945536] [2021-05-02 13:51:23,432 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:23,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895969992] [2021-05-02 13:51:23,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895969992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:23,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:23,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:51:23,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117998363] [2021-05-02 13:51:23,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:51:23,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:23,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:51:23,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:51:23,434 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:51:23,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:23,515 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-05-02 13:51:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:51:23,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-05-02 13:51:23,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:23,517 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:51:23,517 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 13:51:23,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:51:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 13:51:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 13:51:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:51:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-05-02 13:51:23,528 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 25 [2021-05-02 13:51:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:23,528 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-05-02 13:51:23,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:51:23,529 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-05-02 13:51:23,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:51:23,530 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:23,530 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:23,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:23,745 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:23,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:23,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1026670605, now seen corresponding path program 3 times [2021-05-02 13:51:23,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:23,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387165705] [2021-05-02 13:51:23,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:23,752 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:23,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408778034] [2021-05-02 13:51:23,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:23,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:51:23,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:51:23,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:51:23,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:23,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:23,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 13:51:23,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387165705] [2021-05-02 13:51:23,898 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408778034] [2021-05-02 13:51:23,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408778034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:23,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:23,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 13:51:23,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003238441] [2021-05-02 13:51:23,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:51:23,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:23,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:51:23,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:51:23,903 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 13:51:23,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:23,936 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-05-02 13:51:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:51:23,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-05-02 13:51:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:23,937 INFO L225 Difference]: With dead ends: 37 [2021-05-02 13:51:23,937 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:51:23,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:51:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:51:23,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:51:23,942 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 13:51:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:51:23,943 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-02 13:51:23,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:23,943 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:51:23,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 13:51:23,943 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:51:23,943 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:51:24,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:24,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:51:24,304 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 13:51:24,304 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 13:51:24,304 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 13:51:24,304 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:51:24,304 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 13:51:24,304 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:51:24,304 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:51:24,304 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:51:24,304 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:51:24,304 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:51:24,304 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2021-05-02 13:51:24,304 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-02 13:51:24,304 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-02 13:51:24,305 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-02 13:51:24,305 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 39) the Hoare annotation is: true [2021-05-02 13:51:24,305 INFO L194 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (= (+ (* main_~y~0 main_~y~0) main_~y~0) (* main_~x~0 2)) [2021-05-02 13:51:24,305 INFO L198 CegarLoopUtils]: For program point L27-1(lines 26 35) no Hoare annotation was computed. [2021-05-02 13:51:24,305 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 39) no Hoare annotation was computed. [2021-05-02 13:51:24,305 INFO L194 CegarLoopUtils]: At program point L26-2(lines 26 35) the Hoare annotation is: (= (+ (* main_~y~0 main_~y~0) main_~y~0) (* main_~x~0 2)) [2021-05-02 13:51:24,305 INFO L194 CegarLoopUtils]: At program point L26-3(lines 26 35) the Hoare annotation is: (= (+ (* main_~y~0 main_~y~0) main_~y~0) (* main_~x~0 2)) [2021-05-02 13:51:24,305 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 39) no Hoare annotation was computed. [2021-05-02 13:51:24,305 INFO L198 CegarLoopUtils]: For program point L36(line 36) no Hoare annotation was computed. [2021-05-02 13:51:24,305 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-02 13:51:24,305 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-02 13:51:24,305 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-02 13:51:24,305 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-02 13:51:24,305 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-02 13:51:24,305 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-02 13:51:24,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:51:24 BoogieIcfgContainer [2021-05-02 13:51:24,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:51:24,315 INFO L168 Benchmark]: Toolchain (without parser) took 2807.47 ms. Allocated memory is still 207.6 MB. Free memory was 173.1 MB in the beginning and 95.6 MB in the end (delta: 77.4 MB). Peak memory consumption was 77.6 MB. Max. memory is 8.0 GB. [2021-05-02 13:51:24,315 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 207.6 MB. Free memory is still 189.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:51:24,315 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.91 ms. Allocated memory is still 207.6 MB. Free memory was 172.8 MB in the beginning and 163.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:51:24,315 INFO L168 Benchmark]: Boogie Preprocessor took 55.05 ms. Allocated memory is still 207.6 MB. Free memory was 163.4 MB in the beginning and 190.6 MB in the end (delta: -27.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:51:24,315 INFO L168 Benchmark]: RCFGBuilder took 236.16 ms. Allocated memory is still 207.6 MB. Free memory was 190.6 MB in the beginning and 176.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 13:51:24,317 INFO L168 Benchmark]: TraceAbstraction took 2338.64 ms. Allocated memory is still 207.6 MB. Free memory was 175.9 MB in the beginning and 95.6 MB in the end (delta: 80.3 MB). Peak memory consumption was 80.8 MB. Max. memory is 8.0 GB. [2021-05-02 13:51:24,317 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 207.6 MB. Free memory is still 189.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 173.91 ms. Allocated memory is still 207.6 MB. Free memory was 172.8 MB in the beginning and 163.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.05 ms. Allocated memory is still 207.6 MB. Free memory was 163.4 MB in the beginning and 190.6 MB in the end (delta: -27.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 236.16 ms. Allocated memory is still 207.6 MB. Free memory was 190.6 MB in the beginning and 176.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2338.64 ms. Allocated memory is still 207.6 MB. Free memory was 175.9 MB in the beginning and 95.6 MB in the end (delta: 80.3 MB). Peak memory consumption was 80.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2135.3ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 26.8ms, AutomataDifference: 299.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 144.2ms, InitialAbstractionConstructionTime: 6.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 74 SDtfs, 51 SDslu, 222 SDs, 0 SdLazy, 156 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 130.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 172.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, 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: 44.8ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 17 PreInvPairs, 29 NumberOfFragments, 62 HoareAnnotationTreeSize, 17 FomulaSimplifications, 286 FormulaSimplificationTreeSizeReduction, 70.4ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 277 FormulaSimplificationTreeSizeReductionInter, 62.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 42.8ms SsaConstructionTime, 101.2ms SatisfiabilityAnalysisTime, 488.2ms InterpolantComputationTime, 97 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 284 SizeOfPredicates, 7 NumberOfNonLiveVariables, 440 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 37/52 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: 26]: Loop Invariant Derived loop invariant: y * y + y == x * 2 RESULT: Ultimate proved your program to be correct! Received shutdown request...