/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:44:57,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:44:57,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:44:57,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:44:57,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:44:57,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:44:57,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:44:57,161 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 00:44:57,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:44:57,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:44:57,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:44:57,175 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:44:57,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:44:57,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:44:57,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:44:57,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:44:57,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:44:57,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:44:57,176 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:44:57,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:44:57,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:44:57,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:44:57,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:44:57,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:44:57,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:44:57,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:44:57,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:44:57,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:44:57,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:44:57,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:44:57,177 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:44:57,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:44:57,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:44:57,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:44:57,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:44:57,514 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:44:57,514 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:44:57,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c [2021-05-03 00:44:57,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd8864cab/871065c8656f4d62b650ed7cc8825e38/FLAG7e2153b0f [2021-05-03 00:44:58,085 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:44:58,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c [2021-05-03 00:44:58,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd8864cab/871065c8656f4d62b650ed7cc8825e38/FLAG7e2153b0f [2021-05-03 00:44:58,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd8864cab/871065c8656f4d62b650ed7cc8825e38 [2021-05-03 00:44:58,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:44:58,571 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:44:58,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:44:58,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:44:58,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:44:58,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:44:58" (1/1) ... [2021-05-03 00:44:58,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79403be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:44:58, skipping insertion in model container [2021-05-03 00:44:58,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:44:58" (1/1) ... [2021-05-03 00:44:58,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:44:58,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:44:58,744 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c[526,539] [2021-05-03 00:44:58,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:44:58,770 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:44:58,782 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c[526,539] [2021-05-03 00:44:58,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:44:58,822 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:44:58,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:44:58 WrapperNode [2021-05-03 00:44:58,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:44:58,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:44:58,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:44:58,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:44:58,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:44:58" (1/1) ... [2021-05-03 00:44:58,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:44:58" (1/1) ... [2021-05-03 00:44:58,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:44:58" (1/1) ... [2021-05-03 00:44:58,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:44:58" (1/1) ... [2021-05-03 00:44:58,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:44:58" (1/1) ... [2021-05-03 00:44:58,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:44:58" (1/1) ... [2021-05-03 00:44:58,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:44:58" (1/1) ... [2021-05-03 00:44:58,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:44:58,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:44:58,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:44:58,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:44:58,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:44:58" (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 00:44:58,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:44:58,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:44:58,965 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:44:58,966 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:44:58,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:44:58,967 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:44:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:44:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:44:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:44:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:44:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:44:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:44:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:44:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:44:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:44:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:44:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:44:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:44:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:44:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:44:59,233 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:44:59,233 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 00:44:59,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:44:59 BoogieIcfgContainer [2021-05-03 00:44:59,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:44:59,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:44:59,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:44:59,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:44:59,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:44:58" (1/3) ... [2021-05-03 00:44:59,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d9716f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:44:59, skipping insertion in model container [2021-05-03 00:44:59,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:44:58" (2/3) ... [2021-05-03 00:44:59,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d9716f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:44:59, skipping insertion in model container [2021-05-03 00:44:59,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:44:59" (3/3) ... [2021-05-03 00:44:59,243 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound2.c [2021-05-03 00:44:59,247 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:44:59,258 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:44:59,270 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:44:59,285 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:44:59,285 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:44:59,285 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:44:59,285 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:44:59,285 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:44:59,285 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:44:59,285 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:44:59,285 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:44:59,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-03 00:44:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:44:59,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:44:59,301 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:44:59,301 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:44:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:44:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2021-05-03 00:44:59,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:44:59,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915441359] [2021-05-03 00:44:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:44:59,352 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:44:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:59,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:44:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:59,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:44:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:59,463 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 00:44:59,464 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:44:59,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915441359] [2021-05-03 00:44:59,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1915441359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:44:59,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:44:59,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:44:59,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829922140] [2021-05-03 00:44:59,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:44:59,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:44:59,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:44:59,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:44:59,479 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-03 00:44:59,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:44:59,640 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2021-05-03 00:44:59,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:44:59,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-03 00:44:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:44:59,647 INFO L225 Difference]: With dead ends: 61 [2021-05-03 00:44:59,647 INFO L226 Difference]: Without dead ends: 30 [2021-05-03 00:44:59,649 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:44:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-03 00:44:59,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-03 00:44:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-03 00:44:59,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-03 00:44:59,681 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-03 00:44:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:44:59,682 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-03 00:44:59,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-03 00:44:59,682 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-03 00:44:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:44:59,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:44:59,683 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:44:59,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:44:59,683 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:44:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:44:59,684 INFO L82 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2021-05-03 00:44:59,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:44:59,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819567568] [2021-05-03 00:44:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:44:59,687 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:44:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:59,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:44:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:59,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:44:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:59,807 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 00:44:59,807 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:44:59,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819567568] [2021-05-03 00:44:59,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819567568] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:44:59,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:44:59,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 00:44:59,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290339528] [2021-05-03 00:44:59,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 00:44:59,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:44:59,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 00:44:59,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-03 00:44:59,810 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-03 00:45:00,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:45:00,105 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-05-03 00:45:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 00:45:00,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-03 00:45:00,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:45:00,108 INFO L225 Difference]: With dead ends: 43 [2021-05-03 00:45:00,108 INFO L226 Difference]: Without dead ends: 41 [2021-05-03 00:45:00,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 00:45:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-03 00:45:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-03 00:45:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-03 00:45:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-03 00:45:00,131 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-03 00:45:00,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:45:00,131 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-03 00:45:00,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-03 00:45:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-03 00:45:00,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:45:00,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:45:00,133 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:45:00,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:45:00,134 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:45:00,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:45:00,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2021-05-03 00:45:00,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:45:00,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444117123] [2021-05-03 00:45:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:45:00,143 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:45:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:00,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:45:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:00,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:45:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:00,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-03 00:45:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:00,235 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 00:45:00,235 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:45:00,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444117123] [2021-05-03 00:45:00,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [444117123] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:45:00,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:45:00,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 00:45:00,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386705964] [2021-05-03 00:45:00,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 00:45:00,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:45:00,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 00:45:00,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-03 00:45:00,237 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:45:00,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:45:00,463 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-05-03 00:45:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 00:45:00,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-03 00:45:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:45:00,465 INFO L225 Difference]: With dead ends: 47 [2021-05-03 00:45:00,465 INFO L226 Difference]: Without dead ends: 45 [2021-05-03 00:45:00,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 00:45:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-03 00:45:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-03 00:45:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-03 00:45:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-03 00:45:00,474 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-03 00:45:00,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:45:00,474 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-03 00:45:00,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:45:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-03 00:45:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 00:45:00,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:45:00,475 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:45:00,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:45:00,475 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:45:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:45:00,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2021-05-03 00:45:00,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:45:00,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963896843] [2021-05-03 00:45:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:45:00,477 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:45:00,485 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:45:00,485 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:45:00,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 00:45:00,497 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:45:00,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:45:00 BoogieIcfgContainer [2021-05-03 00:45:00,497 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:45:00,498 INFO L168 Benchmark]: Toolchain (without parser) took 1927.65 ms. Allocated memory is still 192.9 MB. Free memory was 157.9 MB in the beginning and 98.2 MB in the end (delta: 59.7 MB). Peak memory consumption was 60.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:00,499 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 192.9 MB. Free memory was 174.4 MB in the beginning and 174.3 MB in the end (delta: 92.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:45:00,499 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.13 ms. Allocated memory is still 192.9 MB. Free memory was 157.6 MB in the beginning and 176.7 MB in the end (delta: -19.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:00,499 INFO L168 Benchmark]: Boogie Preprocessor took 61.36 ms. Allocated memory is still 192.9 MB. Free memory was 176.7 MB in the beginning and 176.0 MB in the end (delta: 639.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:00,500 INFO L168 Benchmark]: RCFGBuilder took 347.47 ms. Allocated memory is still 192.9 MB. Free memory was 176.0 MB in the beginning and 160.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:00,500 INFO L168 Benchmark]: TraceAbstraction took 1259.20 ms. Allocated memory is still 192.9 MB. Free memory was 159.7 MB in the beginning and 98.2 MB in the end (delta: 61.5 MB). Peak memory consumption was 62.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:00,501 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 192.9 MB. Free memory was 174.4 MB in the beginning and 174.3 MB in the end (delta: 92.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.13 ms. Allocated memory is still 192.9 MB. Free memory was 157.6 MB in the beginning and 176.7 MB in the end (delta: -19.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.36 ms. Allocated memory is still 192.9 MB. Free memory was 176.7 MB in the beginning and 176.0 MB in the end (delta: 639.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 347.47 ms. Allocated memory is still 192.9 MB. Free memory was 176.0 MB in the beginning and 160.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1259.20 ms. Allocated memory is still 192.9 MB. Free memory was 159.7 MB in the beginning and 98.2 MB in the end (delta: 61.5 MB). Peak memory consumption was 62.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: 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: [L23] int A, B; [L24] int r, d, p, q; [L25] A = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(A>=0 && A<=2) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(A>=0 && A<=2) [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(q == 0) [L36] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(r == A) [L37] CALL __VERIFIER_assert(d == B * p) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1205.9ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 9.8ms, AutomataDifference: 708.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 88 SDtfs, 89 SDslu, 65 SDs, 0 SdLazy, 209 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 320.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 287.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=3, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49.9ms AutomataMinimizationTime, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 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...