/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/nla-digbench-scaling/dijkstra-u_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:23:23,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:23:23,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:23:23,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:23:23,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:23:23,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:23:23,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:23:23,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:23:23,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:23:23,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:23:23,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:23:23,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:23:23,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:23:23,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:23:23,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:23:23,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:23:23,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:23:23,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:23:23,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:23:23,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:23:23,431 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 12:23:23,442 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:23:23,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:23:23,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:23:23,444 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:23:23,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:23:23,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:23:23,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:23:23,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:23:23,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:23:23,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:23:23,446 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:23:23,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:23:23,446 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:23:23,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:23:23,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:23:23,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:23:23,446 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:23:23,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:23:23,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:23:23,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:23:23,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:23:23,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:23:23,447 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:23:23,447 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:23:23,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:23:23,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:23:23,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:23:23,713 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:23:23,714 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:23:23,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2021-05-06 12:23:23,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49bc3ca5b/b8ea87f9de26422eb3895fa83874a4f0/FLAGa952ff2c1 [2021-05-06 12:23:24,133 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:23:24,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2021-05-06 12:23:24,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49bc3ca5b/b8ea87f9de26422eb3895fa83874a4f0/FLAGa952ff2c1 [2021-05-06 12:23:24,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49bc3ca5b/b8ea87f9de26422eb3895fa83874a4f0 [2021-05-06 12:23:24,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:23:24,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:23:24,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:23:24,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:23:24,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:23:24,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:23:24" (1/1) ... [2021-05-06 12:23:24,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e97d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:24, skipping insertion in model container [2021-05-06 12:23:24,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:23:24" (1/1) ... [2021-05-06 12:23:24,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:23:24,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:23:24,296 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c[533,546] [2021-05-06 12:23:24,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:23:24,333 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:23:24,358 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c[533,546] [2021-05-06 12:23:24,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:23:24,395 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:23:24,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:24 WrapperNode [2021-05-06 12:23:24,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:23:24,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:23:24,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:23:24,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:23:24,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:24" (1/1) ... [2021-05-06 12:23:24,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:24" (1/1) ... [2021-05-06 12:23:24,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:24" (1/1) ... [2021-05-06 12:23:24,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:24" (1/1) ... [2021-05-06 12:23:24,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:24" (1/1) ... [2021-05-06 12:23:24,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:24" (1/1) ... [2021-05-06 12:23:24,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:24" (1/1) ... [2021-05-06 12:23:24,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:23:24,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:23:24,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:23:24,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:23:24,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:24" (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 [2021-05-06 12:23:24,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:23:24,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:23:24,494 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:23:24,494 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:23:24,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:23:24,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:23:24,494 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:23:24,495 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:23:24,495 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:23:24,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:23:24,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 12:23:24,495 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:23:24,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:23:24,496 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:23:24,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:23:24,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:23:24,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:23:24,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:23:24,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:23:24,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:23:24,758 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:23:24,758 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 12:23:24,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:23:24 BoogieIcfgContainer [2021-05-06 12:23:24,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:23:24,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:23:24,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:23:24,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:23:24,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:23:24" (1/3) ... [2021-05-06 12:23:24,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4e689f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:23:24, skipping insertion in model container [2021-05-06 12:23:24,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:24" (2/3) ... [2021-05-06 12:23:24,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4e689f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:23:24, skipping insertion in model container [2021-05-06 12:23:24,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:23:24" (3/3) ... [2021-05-06 12:23:24,763 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound2.c [2021-05-06 12:23:24,767 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:23:24,770 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:23:24,780 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:23:24,793 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:23:24,793 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:23:24,793 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:23:24,793 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:23:24,793 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:23:24,793 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:23:24,793 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:23:24,793 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:23:24,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 12:23:24,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 12:23:24,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:23:24,807 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:23:24,807 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:23:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:23:24,811 INFO L82 PathProgramCache]: Analyzing trace with hash -2024343623, now seen corresponding path program 1 times [2021-05-06 12:23:24,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:23:24,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820574266] [2021-05-06 12:23:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:23:24,892 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:23:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:25,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:23:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:25,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:23:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:23:25,065 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:23:25,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820574266] [2021-05-06 12:23:25,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [820574266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:23:25,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:23:25,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:23:25,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423359383] [2021-05-06 12:23:25,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:23:25,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:23:25,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:23:25,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:23:25,087 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 12:23:25,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:23:25,380 INFO L93 Difference]: Finished difference Result 70 states and 111 transitions. [2021-05-06 12:23:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:23:25,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 12:23:25,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:23:25,386 INFO L225 Difference]: With dead ends: 70 [2021-05-06 12:23:25,386 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 12:23:25,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:23:25,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 12:23:25,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-06 12:23:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 12:23:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2021-05-06 12:23:25,414 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2021-05-06 12:23:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:23:25,414 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2021-05-06 12:23:25,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 12:23:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2021-05-06 12:23:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 12:23:25,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:23:25,415 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:23:25,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:23:25,416 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:23:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:23:25,416 INFO L82 PathProgramCache]: Analyzing trace with hash -96361696, now seen corresponding path program 1 times [2021-05-06 12:23:25,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:23:25,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701415509] [2021-05-06 12:23:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:23:25,418 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:23:25,428 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:23:25,428 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:23:25,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:23:25,438 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:23:25,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:23:25 BoogieIcfgContainer [2021-05-06 12:23:25,438 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:23:25,439 INFO L168 Benchmark]: Toolchain (without parser) took 1282.97 ms. Allocated memory is still 200.3 MB. Free memory was 165.6 MB in the beginning and 119.0 MB in the end (delta: 46.6 MB). Peak memory consumption was 46.6 MB. Max. memory is 8.0 GB. [2021-05-06 12:23:25,440 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 200.3 MB. Free memory is still 182.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:23:25,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.55 ms. Allocated memory is still 200.3 MB. Free memory was 165.2 MB in the beginning and 182.4 MB in the end (delta: -17.2 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-06 12:23:25,440 INFO L168 Benchmark]: Boogie Preprocessor took 28.42 ms. Allocated memory is still 200.3 MB. Free memory was 182.4 MB in the beginning and 180.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 12:23:25,441 INFO L168 Benchmark]: RCFGBuilder took 334.00 ms. Allocated memory is still 200.3 MB. Free memory was 180.8 MB in the beginning and 163.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 12:23:25,441 INFO L168 Benchmark]: TraceAbstraction took 678.71 ms. Allocated memory is still 200.3 MB. Free memory was 163.0 MB in the beginning and 119.0 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2021-05-06 12:23:25,443 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 200.3 MB. Free memory is still 182.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 235.55 ms. Allocated memory is still 200.3 MB. Free memory was 165.2 MB in the beginning and 182.4 MB in the end (delta: -17.2 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.42 ms. Allocated memory is still 200.3 MB. Free memory was 182.4 MB in the beginning and 180.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 334.00 ms. Allocated memory is still 200.3 MB. Free memory was 180.8 MB in the beginning and 163.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 678.71 ms. Allocated memory is still 200.3 MB. Free memory was 163.0 MB in the beginning and 119.0 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int counter = 0; [L21] unsigned int n, p, q, r, h; [L23] n = __VERIFIER_nondet_unsigned_int() [L24] CALL assume_abort_if_not(n < 4294967295 / 4) [L9] COND FALSE !(!cond) [L24] RET assume_abort_if_not(n < 4294967295 / 4) [L26] p = 0 [L27] q = 1 [L28] r = n [L29] h = 0 [L30] EXPR counter++ [L30] COND FALSE !(counter++<2) [L38] EXPR counter++ [L38] COND FALSE !(counter++<2) [L57] CALL __VERIFIER_assert(h*h*h - 12*h*n + 16*n*p + 12*h*r - 16*p*r - h - 4*p == 0) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 639.6ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.4ms, AutomataDifference: 317.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 48 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 27 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 233.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred 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: 17.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...