/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:51:34,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:51:34,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:51:34,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 17:51:34,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 17:51:34,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 17:51:34,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 17:51:34,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 17:51:34,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 17:51:34,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 17:51:34,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 17:51:34,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 17:51:34,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:51:34,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:51:34,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:51:34,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:51:34,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:51:34,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:51:34,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:51:34,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:51:34,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:51:34,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:51:34,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:51:34,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:51:34,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:51:34,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:51:34,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:51:34,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:51:34,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:51:34,551 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:51:34,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:51:34,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:51:34,557 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:51:34,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:51:34,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:51:34,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:51:34,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:51:34,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:51:34,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:51:34,559 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:51:34,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:51:34,561 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:51:34,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:51:34,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:51:34,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:51:34,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:51:34,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:51:34,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:51:34,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:51:34,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:51:34,565 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:51:34,565 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:51:34,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:51:35,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:51:35,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:51:35,022 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:51:35,023 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:51:35,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2021-05-02 17:51:35,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13c1ef926/4ae08532f7e649959a3021a1dfbbaef9/FLAG084bcbbb2 [2021-05-02 17:51:35,790 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:51:35,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2021-05-02 17:51:35,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13c1ef926/4ae08532f7e649959a3021a1dfbbaef9/FLAG084bcbbb2 [2021-05-02 17:51:36,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13c1ef926/4ae08532f7e649959a3021a1dfbbaef9 [2021-05-02 17:51:36,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:51:36,174 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:51:36,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:51:36,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:51:36,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:51:36,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:51:36" (1/1) ... [2021-05-02 17:51:36,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1a5cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:36, skipping insertion in model container [2021-05-02 17:51:36,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:51:36" (1/1) ... [2021-05-02 17:51:36,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:51:36,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:51:36,440 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c[321,334] [2021-05-02 17:51:36,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:51:36,485 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:51:36,500 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c[321,334] [2021-05-02 17:51:36,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:51:36,529 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:51:36,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:36 WrapperNode [2021-05-02 17:51:36,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:51:36,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:51:36,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:51:36,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:51:36,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:36" (1/1) ... [2021-05-02 17:51:36,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:36" (1/1) ... [2021-05-02 17:51:36,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:36" (1/1) ... [2021-05-02 17:51:36,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:36" (1/1) ... [2021-05-02 17:51:36,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:36" (1/1) ... [2021-05-02 17:51:36,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:36" (1/1) ... [2021-05-02 17:51:36,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:36" (1/1) ... [2021-05-02 17:51:36,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:51:36,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:51:36,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:51:36,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:51:36,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:36" (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 17:51:36,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:51:36,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:51:36,778 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:51:36,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:51:36,779 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:51:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:51:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:51:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:51:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:51:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:51:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:51:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:51:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:51:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:51:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:51:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:51:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:51:37,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:51:37,114 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:51:37,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:37 BoogieIcfgContainer [2021-05-02 17:51:37,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:51:37,123 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:51:37,124 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:51:37,125 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:51:37,141 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:37" (1/1) ... [2021-05-02 17:51:37,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:51:37 BasicIcfg [2021-05-02 17:51:37,174 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:51:37,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:51:37,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:51:37,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:51:37,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:51:36" (1/4) ... [2021-05-02 17:51:37,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72aca06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:51:37, skipping insertion in model container [2021-05-02 17:51:37,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:36" (2/4) ... [2021-05-02 17:51:37,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72aca06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:51:37, skipping insertion in model container [2021-05-02 17:51:37,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:37" (3/4) ... [2021-05-02 17:51:37,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72aca06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:51:37, skipping insertion in model container [2021-05-02 17:51:37,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:51:37" (4/4) ... [2021-05-02 17:51:37,185 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-2.cJordan [2021-05-02 17:51:37,192 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:51:37,198 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:51:37,221 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:51:37,246 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:51:37,246 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:51:37,246 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:51:37,246 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:51:37,246 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:51:37,247 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:51:37,247 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:51:37,247 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:51:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:51:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:51:37,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:37,284 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:37,285 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:37,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:37,298 INFO L82 PathProgramCache]: Analyzing trace with hash -737742564, now seen corresponding path program 1 times [2021-05-02 17:51:37,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:37,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672905141] [2021-05-02 17:51:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:37,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:37,704 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 17:51:37,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:37,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672905141] [2021-05-02 17:51:37,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672905141] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:37,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:37,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:51:37,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305528296] [2021-05-02 17:51:37,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:51:37,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:37,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:51:37,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:51:37,727 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 17:51:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:37,783 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-02 17:51:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:51:37,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-02 17:51:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:37,792 INFO L225 Difference]: With dead ends: 21 [2021-05-02 17:51:37,792 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 17:51:37,793 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:51:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 17:51:37,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 17:51:37,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 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 17:51:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 17:51:37,818 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 17:51:37,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:37,818 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 17:51:37,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 17:51:37,819 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 17:51:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:51:37,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:37,820 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:37,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:51:37,821 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:37,823 INFO L82 PathProgramCache]: Analyzing trace with hash -709113413, now seen corresponding path program 1 times [2021-05-02 17:51:37,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:37,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074179184] [2021-05-02 17:51:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:37,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:37,915 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 17:51:37,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:37,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074179184] [2021-05-02 17:51:37,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074179184] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:37,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:37,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:51:37,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023022302] [2021-05-02 17:51:37,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:51:37,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:37,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:51:37,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:51:37,918 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 17:51:37,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:37,953 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-05-02 17:51:37,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:51:37,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2021-05-02 17:51:37,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:37,955 INFO L225 Difference]: With dead ends: 16 [2021-05-02 17:51:37,955 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 17:51:37,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:51:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 17:51:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 17:51:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 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 17:51:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 17:51:37,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-02 17:51:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:37,964 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 17:51:37,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 17:51:37,965 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 17:51:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 17:51:37,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:37,966 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:37,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:51:37,967 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:37,968 INFO L82 PathProgramCache]: Analyzing trace with hash -341174979, now seen corresponding path program 1 times [2021-05-02 17:51:37,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:37,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46499908] [2021-05-02 17:51:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:38,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:38,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:38,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46499908] [2021-05-02 17:51:38,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46499908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:38,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127011946] [2021-05-02 17:51:38,060 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 17:51:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:38,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 17:51:38,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:38,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:38,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127011946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:38,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:38,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 17:51:38,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588276157] [2021-05-02 17:51:38,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:51:38,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:38,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:51:38,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:38,243 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:38,286 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 17:51:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 17:51:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 17:51:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:38,288 INFO L225 Difference]: With dead ends: 18 [2021-05-02 17:51:38,288 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 17:51:38,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 17:51:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 17:51:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 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 17:51:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 17:51:38,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-02 17:51:38,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:38,293 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 17:51:38,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 17:51:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 17:51:38,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:38,295 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:38,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:51:38,518 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:38,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1060341823, now seen corresponding path program 2 times [2021-05-02 17:51:38,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:38,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211032678] [2021-05-02 17:51:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:38,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:38,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:38,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211032678] [2021-05-02 17:51:38,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211032678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:38,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846005861] [2021-05-02 17:51:38,618 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 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 17:51:38,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:38,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:38,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 17:51:38,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:38,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:38,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846005861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:38,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:38,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 17:51:38,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285940420] [2021-05-02 17:51:38,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:51:38,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:38,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:51:38,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:51:38,782 INFO L87 Difference]: Start difference. First operand 17 states and 17 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), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:38,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:38,819 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 17:51:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:51:38,820 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), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 17:51:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:38,821 INFO L225 Difference]: With dead ends: 20 [2021-05-02 17:51:38,821 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 17:51:38,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:51:38,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 17:51:38,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-02 17:51:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 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 17:51:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 17:51:38,824 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-02 17:51:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:38,828 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 17:51:38,828 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), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:38,828 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 17:51:38,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 17:51:38,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:38,829 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:39,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:39,030 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:39,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:39,030 INFO L82 PathProgramCache]: Analyzing trace with hash -701742399, now seen corresponding path program 3 times [2021-05-02 17:51:39,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:39,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355891857] [2021-05-02 17:51:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:39,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:39,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:39,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355891857] [2021-05-02 17:51:39,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355891857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:39,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796531419] [2021-05-02 17:51:39,101 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 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 17:51:39,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 17:51:39,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:39,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 17:51:39,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:39,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-02 17:51:39,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:51:39,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:51:39,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:51:39,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-05-02 17:51:39,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,374 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-05-02 17:51:39,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2021-05-02 17:51:39,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:51:39,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:51:39,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:51:39,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:27, output treesize:7 [2021-05-02 17:51:39,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:51:39,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796531419] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:39,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:51:39,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-05-02 17:51:39,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034683535] [2021-05-02 17:51:39,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:51:39,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:39,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:51:39,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:51:39,474 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 17:51:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:41,591 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-05-02 17:51:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:51:41,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 18 [2021-05-02 17:51:41,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:41,592 INFO L225 Difference]: With dead ends: 17 [2021-05-02 17:51:41,592 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:51:41,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:51:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:51:41,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:51:41,593 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 17:51:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:51:41,593 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-05-02 17:51:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:41,594 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:51:41,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 17:51:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:51:41,594 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:51:41,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:41,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:51:41 BasicIcfg [2021-05-02 17:51:41,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:51:41,823 INFO L168 Benchmark]: Toolchain (without parser) took 5647.83 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 169.5 MB in the beginning and 203.6 MB in the end (delta: -34.1 MB). Peak memory consumption was 7.5 MB. Max. memory is 8.0 GB. [2021-05-02 17:51:41,824 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 204.5 MB. Free memory is still 186.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:51:41,824 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.88 ms. Allocated memory is still 204.5 MB. Free memory was 169.3 MB in the beginning and 160.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 17:51:41,824 INFO L168 Benchmark]: Boogie Preprocessor took 98.71 ms. Allocated memory is still 204.5 MB. Free memory was 160.0 MB in the beginning and 188.8 MB in the end (delta: -28.8 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. [2021-05-02 17:51:41,824 INFO L168 Benchmark]: RCFGBuilder took 487.28 ms. Allocated memory is still 204.5 MB. Free memory was 188.4 MB in the beginning and 175.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:51:41,824 INFO L168 Benchmark]: IcfgTransformer took 50.60 ms. Allocated memory is still 204.5 MB. Free memory was 175.8 MB in the beginning and 174.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 17:51:41,824 INFO L168 Benchmark]: TraceAbstraction took 4644.61 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 174.0 MB in the beginning and 203.6 MB in the end (delta: -29.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:51:41,825 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 204.5 MB. Free memory is still 186.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 348.88 ms. Allocated memory is still 204.5 MB. Free memory was 169.3 MB in the beginning and 160.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 98.71 ms. Allocated memory is still 204.5 MB. Free memory was 160.0 MB in the beginning and 188.8 MB in the end (delta: -28.8 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 487.28 ms. Allocated memory is still 204.5 MB. Free memory was 188.4 MB in the beginning and 175.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 50.60 ms. Allocated memory is still 204.5 MB. Free memory was 175.8 MB in the beginning and 174.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4644.61 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 174.0 MB in the beginning and 203.6 MB in the end (delta: -29.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4575.0ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 21.5ms, AutomataDifference: 2332.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57 SDtfs, 24 SDslu, 81 SDs, 0 SdLazy, 119 SolverSat, 11 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2156.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 344.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 28.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 64.5ms SsaConstructionTime, 229.6ms SatisfiabilityAnalysisTime, 950.1ms InterpolantComputationTime, 120 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 112 ConstructedInterpolants, 2 QuantifiedInterpolants, 372 SizeOfPredicates, 5 NumberOfNonLiveVariables, 317 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 9/28 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...