/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/trex01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:15:44,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:15:44,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:15:44,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:15:44,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 23:15:44,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 23:15:44,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 23:15:44,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 23:15:44,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 23:15:44,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 23:15:44,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 23:15:44,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 23:15:44,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 23:15:44,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 23:15:44,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 23:15:44,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 23:15:44,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 23:15:44,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:15:44,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:15:44,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:15:44,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:15:44,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:15:44,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:15:44,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:15:44,891 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:15:44,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:15:44,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:15:44,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:15:44,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:15:44,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:15:44,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:15:44,893 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:15:44,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:15:44,893 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:15:44,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:15:44,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:15:44,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:15:44,894 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:15:44,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:15:44,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:15:44,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:15:44,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:15:44,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:15:44,895 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:15:44,895 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:15:45,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:15:45,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:15:45,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:15:45,293 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:15:45,294 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:15:45,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-1.c [2021-05-02 23:15:45,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553d06877/fc9270a7dc5a41d4a5ca3f7cfcec7057/FLAG1faba0828 [2021-05-02 23:15:45,869 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:15:45,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-1.c [2021-05-02 23:15:45,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553d06877/fc9270a7dc5a41d4a5ca3f7cfcec7057/FLAG1faba0828 [2021-05-02 23:15:46,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553d06877/fc9270a7dc5a41d4a5ca3f7cfcec7057 [2021-05-02 23:15:46,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:15:46,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:15:46,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:15:46,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:15:46,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:15:46,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:15:46" (1/1) ... [2021-05-02 23:15:46,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65a9b0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:46, skipping insertion in model container [2021-05-02 23:15:46,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:15:46" (1/1) ... [2021-05-02 23:15:46,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:15:46,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:15:46,418 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-1.c[320,333] [2021-05-02 23:15:46,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:15:46,446 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:15:46,458 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-1.c[320,333] [2021-05-02 23:15:46,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:15:46,486 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:15:46,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:46 WrapperNode [2021-05-02 23:15:46,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:15:46,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:15:46,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:15:46,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:15:46,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:46" (1/1) ... [2021-05-02 23:15:46,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:46" (1/1) ... [2021-05-02 23:15:46,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:46" (1/1) ... [2021-05-02 23:15:46,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:46" (1/1) ... [2021-05-02 23:15:46,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:46" (1/1) ... [2021-05-02 23:15:46,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:46" (1/1) ... [2021-05-02 23:15:46,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:46" (1/1) ... [2021-05-02 23:15:46,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:15:46,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:15:46,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:15:46,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:15:46,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:46" (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 23:15:46,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:15:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:15:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:15:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:15:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-05-02 23:15:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:15:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:15:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:15:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:15:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:15:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:15:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 23:15:46,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:15:46,649 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-05-02 23:15:46,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:15:46,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:15:46,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:15:46,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:15:46,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:15:46,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:15:46,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:15:46,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:15:46,940 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 23:15:46,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:15:46 BoogieIcfgContainer [2021-05-02 23:15:46,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:15:46,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:15:46,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:15:46,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:15:46,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:15:46" (1/3) ... [2021-05-02 23:15:46,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136a3695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:15:46, skipping insertion in model container [2021-05-02 23:15:46,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:46" (2/3) ... [2021-05-02 23:15:46,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136a3695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:15:46, skipping insertion in model container [2021-05-02 23:15:46,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:15:46" (3/3) ... [2021-05-02 23:15:46,949 INFO L111 eAbstractionObserver]: Analyzing ICFG trex01-1.c [2021-05-02 23:15:46,954 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:15:46,957 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:15:46,975 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:15:47,008 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:15:47,008 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:15:47,008 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:15:47,009 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:15:47,009 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:15:47,009 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:15:47,009 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:15:47,009 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:15:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.5) internal successors, (27), 21 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:15:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:15:47,055 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:47,056 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:47,056 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:47,064 INFO L82 PathProgramCache]: Analyzing trace with hash 172866924, now seen corresponding path program 1 times [2021-05-02 23:15:47,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:47,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001947333] [2021-05-02 23:15:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:47,137 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:47,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:47,398 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 23:15:47,400 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:47,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001947333] [2021-05-02 23:15:47,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1001947333] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:47,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:47,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:15:47,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490530047] [2021-05-02 23:15:47,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:15:47,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:47,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:15:47,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:15:47,423 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.5) internal successors, (27), 21 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 23:15:47,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:47,548 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-05-02 23:15:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:15:47,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 15 [2021-05-02 23:15:47,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:47,561 INFO L225 Difference]: With dead ends: 46 [2021-05-02 23:15:47,562 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 23:15:47,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:15:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 23:15:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 23:15:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 5 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-02 23:15:47,616 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-05-02 23:15:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:47,616 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-02 23:15:47,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 23:15:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-02 23:15:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:15:47,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:47,618 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:47,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:15:47,619 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash 169172840, now seen corresponding path program 1 times [2021-05-02 23:15:47,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:47,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112547205] [2021-05-02 23:15:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:47,631 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:15:47,676 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:15:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:15:47,712 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:15:47,751 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-02 23:15:47,751 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 23:15:47,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:15:47,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:15:47 BoogieIcfgContainer [2021-05-02 23:15:47,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:15:47,771 INFO L168 Benchmark]: Toolchain (without parser) took 1503.91 ms. Allocated memory is still 179.3 MB. Free memory was 144.1 MB in the beginning and 112.4 MB in the end (delta: 31.7 MB). Peak memory consumption was 32.0 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:47,771 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 179.3 MB. Free memory is still 160.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:15:47,773 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.56 ms. Allocated memory is still 179.3 MB. Free memory was 143.9 MB in the beginning and 134.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:47,773 INFO L168 Benchmark]: Boogie Preprocessor took 61.73 ms. Allocated memory is still 179.3 MB. Free memory was 134.3 MB in the beginning and 163.3 MB in the end (delta: -29.0 MB). Peak memory consumption was 5.8 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:47,774 INFO L168 Benchmark]: RCFGBuilder took 383.95 ms. Allocated memory is still 179.3 MB. Free memory was 162.8 MB in the beginning and 147.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:47,775 INFO L168 Benchmark]: TraceAbstraction took 825.00 ms. Allocated memory is still 179.3 MB. Free memory was 147.0 MB in the beginning and 112.4 MB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. [2021-05-02 23:15:47,782 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 179.3 MB. Free memory is still 160.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 217.56 ms. Allocated memory is still 179.3 MB. Free memory was 143.9 MB in the beginning and 134.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.73 ms. Allocated memory is still 179.3 MB. Free memory was 134.3 MB in the beginning and 163.3 MB in the end (delta: -29.0 MB). Peak memory consumption was 5.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 383.95 ms. Allocated memory is still 179.3 MB. Free memory was 162.8 MB in the beginning and 147.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 825.00 ms. Allocated memory is still 179.3 MB. Free memory was 147.0 MB in the beginning and 112.4 MB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L36] _Bool c = __VERIFIER_nondet_bool(); [L37] COND TRUE \read(c) [L38] CALL f(1) [L15] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L15] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L15] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L15] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L16] COND FALSE !(!(k <= 1073741823)) [L19] COND FALSE !(z < k) [L20] CALL __VERIFIER_assert(z>=2) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 748.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 18.5ms, AutomataDifference: 157.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 21 SDslu, 3 SDs, 0 SdLazy, 6 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 51.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 36.1ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...