/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-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:33:08,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:33:08,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:33:08,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:33:08,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:33:08,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:33:08,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:33:08,813 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 23:33:08,824 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:33:08,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:33:08,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:33:08,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:33:08,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:33:08,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:33:08,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:33:08,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:33:08,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:33:08,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:33:08,828 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:33:08,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:33:08,828 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:33:08,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:33:08,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:33:08,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:33:08,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:33:08,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:33:08,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:33:08,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:33:08,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:33:08,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:33:08,830 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:33:08,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:33:09,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:33:09,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:33:09,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:33:09,106 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:33:09,106 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:33:09,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2021-05-02 23:33:09,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4677adfd6/518ecdf226a44d479ca7a0758241cb20/FLAG9ad8bf9e6 [2021-05-02 23:33:09,510 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:33:09,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2021-05-02 23:33:09,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4677adfd6/518ecdf226a44d479ca7a0758241cb20/FLAG9ad8bf9e6 [2021-05-02 23:33:09,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4677adfd6/518ecdf226a44d479ca7a0758241cb20 [2021-05-02 23:33:09,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:33:09,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:33:09,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:33:09,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:33:09,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:33:09,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:33:09" (1/1) ... [2021-05-02 23:33:09,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c320a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:09, skipping insertion in model container [2021-05-02 23:33:09,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:33:09" (1/1) ... [2021-05-02 23:33:09,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:33:09,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:33:10,044 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-lit/ddlm2013.i[895,908] [2021-05-02 23:33:10,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:33:10,059 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:33:10,071 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-lit/ddlm2013.i[895,908] [2021-05-02 23:33:10,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:33:10,094 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:33:10,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:10 WrapperNode [2021-05-02 23:33:10,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:33:10,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:33:10,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:33:10,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:33:10,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:10" (1/1) ... [2021-05-02 23:33:10,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:10" (1/1) ... [2021-05-02 23:33:10,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:10" (1/1) ... [2021-05-02 23:33:10,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:10" (1/1) ... [2021-05-02 23:33:10,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:10" (1/1) ... [2021-05-02 23:33:10,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:10" (1/1) ... [2021-05-02 23:33:10,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:10" (1/1) ... [2021-05-02 23:33:10,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:33:10,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:33:10,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:33:10,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:33:10,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:10" (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 23:33:10,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:33:10,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:33:10,212 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:33:10,212 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 23:33:10,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:33:10,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:33:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:33:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:33:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:33:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:33:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:33:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:33:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 23:33:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:33:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:33:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:33:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:33:10,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:33:10,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:33:10,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:33:10,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:33:10,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:33:10,455 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:33:10,455 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:33:10,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:33:10 BoogieIcfgContainer [2021-05-02 23:33:10,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:33:10,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:33:10,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:33:10,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:33:10,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:33:09" (1/3) ... [2021-05-02 23:33:10,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dec7b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:33:10, skipping insertion in model container [2021-05-02 23:33:10,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:33:10" (2/3) ... [2021-05-02 23:33:10,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dec7b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:33:10, skipping insertion in model container [2021-05-02 23:33:10,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:33:10" (3/3) ... [2021-05-02 23:33:10,461 INFO L111 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2021-05-02 23:33:10,464 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:33:10,466 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:33:10,480 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:33:10,492 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:33:10,492 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:33:10,492 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:33:10,492 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:33:10,492 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:33:10,492 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:33:10,492 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:33:10,492 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:33:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:33:10,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 23:33:10,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:10,505 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:10,506 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash -948948446, now seen corresponding path program 1 times [2021-05-02 23:33:10,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:10,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224004013] [2021-05-02 23:33:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:10,558 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:10,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:10,714 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 23:33:10,715 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:10,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224004013] [2021-05-02 23:33:10,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224004013] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:10,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:10,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:33:10,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576414854] [2021-05-02 23:33:10,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:33:10,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:10,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:33:10,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:33:10,728 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:10,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:10,788 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-05-02 23:33:10,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:33:10,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2021-05-02 23:33:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:10,795 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:33:10,795 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 23:33:10,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:33:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 23:33:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 23:33:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:10,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-05-02 23:33:10,826 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2021-05-02 23:33:10,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:10,826 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-05-02 23:33:10,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-05-02 23:33:10,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:33:10,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:10,827 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:10,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:33:10,828 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:10,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:10,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1572998999, now seen corresponding path program 1 times [2021-05-02 23:33:10,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:10,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652194995] [2021-05-02 23:33:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:10,835 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:10,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:10,968 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 23:33:10,968 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:10,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652194995] [2021-05-02 23:33:10,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1652194995] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:10,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:10,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:33:10,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663046305] [2021-05-02 23:33:10,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:33:10,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:10,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:33:10,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:33:10,970 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:11,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:11,104 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-05-02 23:33:11,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:33:11,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 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 14 [2021-05-02 23:33:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:11,106 INFO L225 Difference]: With dead ends: 24 [2021-05-02 23:33:11,106 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 23:33:11,107 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:33:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 23:33:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 23:33:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:11,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-02 23:33:11,112 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-05-02 23:33:11,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:11,112 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-02 23:33:11,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:33:11,112 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-02 23:33:11,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:33:11,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:11,113 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:11,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:33:11,113 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:11,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:11,113 INFO L82 PathProgramCache]: Analyzing trace with hash -898740055, now seen corresponding path program 1 times [2021-05-02 23:33:11,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:11,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690420340] [2021-05-02 23:33:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:11,173 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 0 (+ |v_main_#t~nondet4_7| 2147483648)) (<= |v_main_#t~nondet4_7| 2147483647) (= (mod v_main_~i~0_9 2) 0) (not (= |v_main_#t~nondet4_7| 0))) InVars {main_~i~0=v_main_~i~0_9, main_#t~nondet4=|v_main_#t~nondet4_7|} OutVars{main_~i~0=v_main_~i~0_9, main_#t~nondet4=|v_main_#t~nondet4_7|} AuxVars[] AssignedVars[] [2021-05-02 23:33:11,227 WARN L240 tifierPushTermWalker]: treesize reduction 18, result has 87.8 percent of original size [2021-05-02 23:33:11,325 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:11,326 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:33:11,340 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:33:11,344 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-02 23:33:11,404 WARN L245 tifierPushTermWalker]: treesize reduction 18, result has 87.8 percent of original size 129 [2021-05-02 23:33:11,458 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:33:11,481 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-02 23:33:11,481 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 23:33:11,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:33:11,493 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 23:33:11,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:33:11 BoogieIcfgContainer [2021-05-02 23:33:11,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:33:11,495 INFO L168 Benchmark]: Toolchain (without parser) took 1561.77 ms. Allocated memory is still 175.1 MB. Free memory was 140.7 MB in the beginning and 112.5 MB in the end (delta: 28.1 MB). Peak memory consumption was 29.7 MB. Max. memory is 8.0 GB. [2021-05-02 23:33:11,495 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 175.1 MB. Free memory is still 157.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:33:11,495 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.98 ms. Allocated memory is still 175.1 MB. Free memory was 140.4 MB in the beginning and 130.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 23:33:11,496 INFO L168 Benchmark]: Boogie Preprocessor took 60.74 ms. Allocated memory is still 175.1 MB. Free memory was 130.8 MB in the beginning and 158.2 MB in the end (delta: -27.4 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. [2021-05-02 23:33:11,496 INFO L168 Benchmark]: RCFGBuilder took 299.14 ms. Allocated memory is still 175.1 MB. Free memory was 158.2 MB in the beginning and 143.0 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 23:33:11,496 INFO L168 Benchmark]: TraceAbstraction took 1036.76 ms. Allocated memory is still 175.1 MB. Free memory was 142.5 MB in the beginning and 112.5 MB in the end (delta: 30.0 MB). Peak memory consumption was 30.3 MB. Max. memory is 8.0 GB. [2021-05-02 23:33:11,501 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 175.1 MB. Free memory is still 157.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 155.98 ms. Allocated memory is still 175.1 MB. Free memory was 140.4 MB in the beginning and 130.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.74 ms. Allocated memory is still 175.1 MB. Free memory was 130.8 MB in the beginning and 158.2 MB in the end (delta: -27.4 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 299.14 ms. Allocated memory is still 175.1 MB. Free memory was 158.2 MB in the beginning and 143.0 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1036.76 ms. Allocated memory is still 175.1 MB. Free memory was 142.5 MB in the beginning and 112.5 MB in the end (delta: 30.0 MB). Peak memory consumption was 30.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: 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: [L25] unsigned int i,j,a,b; [L26] int flag = __VERIFIER_nondet_int(); [L27] a = 0 [L28] b = 0 [L29] j = 1 [L30] COND TRUE \read(flag) [L31] i = 0 [L35] COND TRUE __VERIFIER_nondet_int() [L36] a++ [L37] b += (j - i) [L38] i += 2 [L39] COND TRUE i%2 == 0 [L40] j += 2 [L35] COND FALSE !(__VERIFIER_nondet_int()) [L45] COND TRUE \read(flag) [L46] CALL __VERIFIER_assert(a == b) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 994.4ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 7.8ms, AutomataDifference: 214.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39 SDtfs, 35 SDslu, 19 SDs, 0 SdLazy, 45 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 135.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23.6ms AutomataMinimizationTime, 2 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...