/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/loop-zilu/benchmark20_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:33:44,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:33:44,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:33:44,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:33:45,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:33:45,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:33:45,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:33:45,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:33:45,062 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:33:45,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:33:45,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:33:45,065 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:33:45,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:33:45,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:33:45,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:33:45,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:33:45,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:33:45,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:33:45,066 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:33:45,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:33:45,066 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:33:45,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:33:45,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:33:45,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:33:45,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:33:45,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:33:45,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:33:45,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:33:45,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:33:45,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:33:45,068 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:33:45,068 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:33:45,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:33:45,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:33:45,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:33:45,498 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:33:45,501 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:33:45,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i [2021-05-03 00:33:45,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4fce716e/949e4b406be443769ba4f218a99dcc20/FLAG4a3bb543e [2021-05-03 00:33:46,177 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:33:46,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark20_conjunctive.i [2021-05-03 00:33:46,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4fce716e/949e4b406be443769ba4f218a99dcc20/FLAG4a3bb543e [2021-05-03 00:33:46,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4fce716e/949e4b406be443769ba4f218a99dcc20 [2021-05-03 00:33:46,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:33:46,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:33:46,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:33:46,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:33:46,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:33:46,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:33:46" (1/1) ... [2021-05-03 00:33:46,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5499693a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:46, skipping insertion in model container [2021-05-03 00:33:46,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:33:46" (1/1) ... [2021-05-03 00:33:46,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:33:46,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:33:46,755 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-zilu/benchmark20_conjunctive.i[873,886] [2021-05-03 00:33:46,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:33:46,780 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:33:46,794 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-zilu/benchmark20_conjunctive.i[873,886] [2021-05-03 00:33:46,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:33:46,811 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:33:46,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:46 WrapperNode [2021-05-03 00:33:46,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:33:46,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:33:46,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:33:46,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:33:46,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:46" (1/1) ... [2021-05-03 00:33:46,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:46" (1/1) ... [2021-05-03 00:33:46,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:46" (1/1) ... [2021-05-03 00:33:46,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:46" (1/1) ... [2021-05-03 00:33:46,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:46" (1/1) ... [2021-05-03 00:33:46,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:46" (1/1) ... [2021-05-03 00:33:46,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:46" (1/1) ... [2021-05-03 00:33:46,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:33:46,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:33:46,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:33:46,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:33:46,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:46" (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 [2021-05-03 00:33:46,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:33:46,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:33:46,998 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:33:46,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:33:46,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:33:46,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:33:46,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-03 00:33:46,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-03 00:33:46,999 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:33:47,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:33:47,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:33:47,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-03 00:33:47,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:33:47,002 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:33:47,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:33:47,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:33:47,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:33:47,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:33:47,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:33:47,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:33:47,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:33:47,278 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:33:47,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:33:47 BoogieIcfgContainer [2021-05-03 00:33:47,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:33:47,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:33:47,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:33:47,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:33:47,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:33:46" (1/3) ... [2021-05-03 00:33:47,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70396971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:33:47, skipping insertion in model container [2021-05-03 00:33:47,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:46" (2/3) ... [2021-05-03 00:33:47,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70396971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:33:47, skipping insertion in model container [2021-05-03 00:33:47,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:33:47" (3/3) ... [2021-05-03 00:33:47,289 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark20_conjunctive.i [2021-05-03 00:33:47,296 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:33:47,301 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:33:47,320 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:33:47,356 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:33:47,357 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:33:47,357 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:33:47,357 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:33:47,357 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:33:47,357 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:33:47,357 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:33:47,357 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:33:47,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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) [2021-05-03 00:33:47,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 00:33:47,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:33:47,393 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:33:47,394 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:33:47,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:33:47,399 INFO L82 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 1 times [2021-05-03 00:33:47,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:33:47,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990968998] [2021-05-03 00:33:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:33:47,466 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:33:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:47,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:33:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:33:47,687 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:33:47,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990968998] [2021-05-03 00:33:47,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [990968998] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:33:47,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:33:47,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 00:33:47,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584212992] [2021-05-03 00:33:47,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 00:33:47,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:33:47,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 00:33:47,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-03 00:33:47,713 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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) [2021-05-03 00:33:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:33:48,093 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-05-03 00:33:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 00:33:48,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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 [2021-05-03 00:33:48,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:33:48,103 INFO L225 Difference]: With dead ends: 41 [2021-05-03 00:33:48,103 INFO L226 Difference]: Without dead ends: 14 [2021-05-03 00:33:48,109 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 00:33:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-03 00:33:48,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-03 00:33:48,159 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) [2021-05-03 00:33:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-03 00:33:48,162 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-03 00:33:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:33:48,163 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-03 00:33:48,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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) [2021-05-03 00:33:48,164 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-03 00:33:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 00:33:48,167 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:33:48,167 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:33:48,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:33:48,168 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:33:48,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:33:48,169 INFO L82 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 1 times [2021-05-03 00:33:48,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:33:48,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123527537] [2021-05-03 00:33:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:33:48,241 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_8 v_main_~n~0_6) InVars {main_~i~0=v_main_~i~0_8, main_~n~0=v_main_~n~0_6} OutVars{main_~i~0=v_main_~i~0_8, main_~n~0=v_main_~n~0_6} AuxVars[] AssignedVars[] [2021-05-03 00:33:48,328 WARN L240 tifierPushTermWalker]: treesize reduction 14, result has 92.0 percent of original size [2021-05-03 00:33:48,378 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:33:48,524 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-03 00:33:48,561 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-03 00:33:48,658 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:33:48,698 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-03 00:33:48,760 WARN L245 tifierPushTermWalker]: treesize reduction 14, result has 92.0 percent of original size 162 [2021-05-03 00:33:50,914 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 00:33:50,926 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:33:50,952 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:33:50,952 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:33:50,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:33:50,975 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:33:50,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:33:50 BoogieIcfgContainer [2021-05-03 00:33:50,976 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:33:50,978 INFO L168 Benchmark]: Toolchain (without parser) took 4428.12 ms. Allocated memory is still 168.8 MB. Free memory was 134.4 MB in the beginning and 104.7 MB in the end (delta: 29.6 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:33:50,978 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 168.8 MB. Free memory is still 150.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:33:50,980 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.93 ms. Allocated memory is still 168.8 MB. Free memory was 134.1 MB in the beginning and 124.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:33:50,981 INFO L168 Benchmark]: Boogie Preprocessor took 72.64 ms. Allocated memory is still 168.8 MB. Free memory was 124.8 MB in the beginning and 152.4 MB in the end (delta: -27.6 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-03 00:33:50,987 INFO L168 Benchmark]: RCFGBuilder took 390.98 ms. Allocated memory is still 168.8 MB. Free memory was 152.0 MB in the beginning and 138.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:33:50,987 INFO L168 Benchmark]: TraceAbstraction took 3694.16 ms. Allocated memory is still 168.8 MB. Free memory was 138.4 MB in the beginning and 104.7 MB in the end (delta: 33.6 MB). Peak memory consumption was 34.5 MB. Max. memory is 8.0 GB. [2021-05-03 00:33:50,992 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 168.8 MB. Free memory is still 150.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 259.93 ms. Allocated memory is still 168.8 MB. Free memory was 134.1 MB in the beginning and 124.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.64 ms. Allocated memory is still 168.8 MB. Free memory was 124.8 MB in the beginning and 152.4 MB in the end (delta: -27.6 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 390.98 ms. Allocated memory is still 168.8 MB. Free memory was 152.0 MB in the beginning and 138.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3694.16 ms. Allocated memory is still 168.8 MB. Free memory was 138.4 MB in the beginning and 104.7 MB in the end (delta: 33.6 MB). Peak memory consumption was 34.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: 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: [L20] int i = __VERIFIER_nondet_int(); [L21] int n = __VERIFIER_nondet_int(); [L22] int sum = __VERIFIER_nondet_int(); [L23] COND FALSE !(!(i==0 && n>=0 && n<=100 && sum==0)) [L24] COND TRUE i=0) [L15] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 3603.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 22.1ms, AutomataDifference: 410.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 18 SDtfs, 25 SDslu, 26 SDs, 0 SdLazy, 53 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 116.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 192.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 36.5ms 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...