/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:17:38,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:17:38,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:17:38,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:17:38,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:17:38,742 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:17:38,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:17:38,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:17:38,745 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:17:38,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:17:38,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:17:38,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:17:38,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:17:38,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:17:38,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:17:38,747 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:17:38,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:17:38,747 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:17:38,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:17:38,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:17:38,748 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:17:38,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:17:38,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:17:38,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:17:38,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:17:38,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:17:38,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:17:38,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:17:39,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:17:39,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:17:39,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:17:39,177 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:17:39,178 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:17:39,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-2.i [2021-02-24 00:17:39,288 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d262072/d972c52a28aa4712811bfb102c6a259a/FLAG0b81139d5 [2021-02-24 00:17:40,048 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:17:40,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-2.i [2021-02-24 00:17:40,057 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d262072/d972c52a28aa4712811bfb102c6a259a/FLAG0b81139d5 [2021-02-24 00:17:40,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d262072/d972c52a28aa4712811bfb102c6a259a [2021-02-24 00:17:40,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:17:40,415 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:17:40,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:40,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:17:40,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:17:40,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:40" (1/1) ... [2021-02-24 00:17:40,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f0f31f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:40, skipping insertion in model container [2021-02-24 00:17:40,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:40" (1/1) ... [2021-02-24 00:17:40,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:17:40,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:17:40,647 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-2.i[921,934] [2021-02-24 00:17:40,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:40,670 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:17:40,684 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-2.i[921,934] [2021-02-24 00:17:40,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:40,707 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:17:40,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:40 WrapperNode [2021-02-24 00:17:40,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:40,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:17:40,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:17:40,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:17:40,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:40" (1/1) ... [2021-02-24 00:17:40,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:40" (1/1) ... [2021-02-24 00:17:40,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:40" (1/1) ... [2021-02-24 00:17:40,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:40" (1/1) ... [2021-02-24 00:17:40,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:40" (1/1) ... [2021-02-24 00:17:40,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:40" (1/1) ... [2021-02-24 00:17:40,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:40" (1/1) ... [2021-02-24 00:17:40,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:17:40,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:17:40,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:17:40,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:17:40,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:40" (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 [2021-02-24 00:17:40,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:17:40,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:17:40,853 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:17:40,854 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:17:40,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:17:40,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:17:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:17:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:17:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 00:17:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 00:17:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:17:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:17:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:17:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:17:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-24 00:17:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:17:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:17:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:17:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:17:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:17:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:17:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:17:41,220 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:17:41,221 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:17:41,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:41 BoogieIcfgContainer [2021-02-24 00:17:41,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:17:41,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:17:41,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:17:41,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:17:41,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:17:40" (1/3) ... [2021-02-24 00:17:41,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f55a030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:41, skipping insertion in model container [2021-02-24 00:17:41,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:40" (2/3) ... [2021-02-24 00:17:41,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f55a030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:41, skipping insertion in model container [2021-02-24 00:17:41,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:41" (3/3) ... [2021-02-24 00:17:41,249 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-2.i [2021-02-24 00:17:41,263 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:17:41,277 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:17:41,319 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:17:41,362 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:17:41,362 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:17:41,362 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:17:41,363 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:17:41,363 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:17:41,363 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:17:41,363 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:17:41,363 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:17:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-02-24 00:17:41,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-24 00:17:41,406 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:41,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:41,409 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:41,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:41,423 INFO L82 PathProgramCache]: Analyzing trace with hash -574102008, now seen corresponding path program 1 times [2021-02-24 00:17:41,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:41,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259527069] [2021-02-24 00:17:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:41,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:41,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:41,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:41,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:41,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:41,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:41,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:41,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259527069] [2021-02-24 00:17:41,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:41,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:17:41,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490929103] [2021-02-24 00:17:41,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:17:41,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:41,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:17:41,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:17:41,854 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2021-02-24 00:17:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:42,022 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-02-24 00:17:42,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:17:42,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-02-24 00:17:42,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:42,033 INFO L225 Difference]: With dead ends: 59 [2021-02-24 00:17:42,034 INFO L226 Difference]: Without dead ends: 29 [2021-02-24 00:17:42,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:17:42,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-02-24 00:17:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-02-24 00:17:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-24 00:17:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-02-24 00:17:42,101 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 21 [2021-02-24 00:17:42,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:42,102 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-02-24 00:17:42,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:17:42,103 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-02-24 00:17:42,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-24 00:17:42,105 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:42,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:42,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:17:42,106 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:42,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1917407422, now seen corresponding path program 1 times [2021-02-24 00:17:42,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:42,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13262578] [2021-02-24 00:17:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:42,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:42,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:42,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:42,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:42,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:42,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:42,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:42,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13262578] [2021-02-24 00:17:42,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:42,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 00:17:42,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232659201] [2021-02-24 00:17:42,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:17:42,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:42,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:17:42,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:17:42,249 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 5 states. [2021-02-24 00:17:42,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:42,352 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-02-24 00:17:42,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:17:42,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2021-02-24 00:17:42,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:42,356 INFO L225 Difference]: With dead ends: 45 [2021-02-24 00:17:42,356 INFO L226 Difference]: Without dead ends: 40 [2021-02-24 00:17:42,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:17:42,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-24 00:17:42,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-02-24 00:17:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-24 00:17:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-02-24 00:17:42,369 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 24 [2021-02-24 00:17:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:42,370 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-02-24 00:17:42,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:17:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-02-24 00:17:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-24 00:17:42,371 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:42,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:17:42,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:17:42,372 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:42,373 INFO L82 PathProgramCache]: Analyzing trace with hash -160004357, now seen corresponding path program 1 times [2021-02-24 00:17:42,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:42,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275050825] [2021-02-24 00:17:42,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:42,400 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:42,440 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:42,475 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:17:42,476 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:17:42,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:17:42,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:17:42 BoogieIcfgContainer [2021-02-24 00:17:42,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:17:42,521 INFO L168 Benchmark]: Toolchain (without parser) took 2119.25 ms. Allocated memory is still 163.6 MB. Free memory was 139.9 MB in the beginning and 83.8 MB in the end (delta: 56.1 MB). Peak memory consumption was 56.3 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:42,522 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 163.6 MB. Free memory is still 137.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:17:42,523 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.12 ms. Allocated memory is still 163.6 MB. Free memory was 138.8 MB in the beginning and 129.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:42,524 INFO L168 Benchmark]: Boogie Preprocessor took 39.14 ms. Allocated memory is still 163.6 MB. Free memory was 129.1 MB in the beginning and 127.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:42,525 INFO L168 Benchmark]: RCFGBuilder took 477.43 ms. Allocated memory is still 163.6 MB. Free memory was 127.6 MB in the beginning and 142.0 MB in the end (delta: -14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:42,526 INFO L168 Benchmark]: TraceAbstraction took 1290.13 ms. Allocated memory is still 163.6 MB. Free memory was 141.4 MB in the beginning and 83.8 MB in the end (delta: 57.7 MB). Peak memory consumption was 57.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:42,529 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 163.6 MB. Free memory is still 137.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 289.12 ms. Allocated memory is still 163.6 MB. Free memory was 138.8 MB in the beginning and 129.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.14 ms. Allocated memory is still 163.6 MB. Free memory was 129.1 MB in the beginning and 127.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 477.43 ms. Allocated memory is still 163.6 MB. Free memory was 127.6 MB in the beginning and 142.0 MB in the end (delta: -14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1290.13 ms. Allocated memory is still 163.6 MB. Free memory was 141.4 MB in the beginning and 83.8 MB in the end (delta: 57.7 MB). Peak memory consumption was 57.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L35] unsigned int array[10000]; VAL [array={3:0}] [L36] unsigned int index = 0; VAL [array={3:0}, index=0] [L37] unsigned int tmp = 0; VAL [array={3:0}, index=0, tmp=0] [L39] COND TRUE 1 VAL [array={3:0}, index=0, tmp=0] [L40] index = __VERIFIER_nondet_uint() VAL [__VERIFIER_nondet_uint()=10000, array={3:0}, index=10000, tmp=0] [L41] COND TRUE index >= 10000 VAL [array={3:0}, index=10000, tmp=0] [L48] EXPR tmp < 10000 && array[tmp] == tmp VAL [array={3:0}, index=10000, tmp=0, tmp < 10000 && array[tmp] == tmp=1] [L48] EXPR array[tmp] VAL [array={3:0}, array[tmp]=6, index=10000, tmp=0, tmp < 10000 && array[tmp] == tmp=1] [L48] EXPR tmp < 10000 && array[tmp] == tmp VAL [array={3:0}, array[tmp]=6, index=10000, tmp=0, tmp < 10000 && array[tmp] == tmp=0] [L48] CALL __VERIFIER_assert(tmp < 10000 && array[tmp] == tmp) VAL [\old(cond)=0] [L25] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L26] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 16 SDslu, 50 SDs, 0 SdLazy, 69 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 71 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 2191 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...