/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:57:45,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:57:45,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:57:45,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:57:45,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:57:45,175 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:57:45,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:57:45,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:57:45,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:57:45,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:57:45,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:57:45,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:57:45,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:57:45,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:57:45,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:57:45,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:57:45,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:57:45,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:57:45,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:57:45,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:57:45,180 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:57:45,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:57:45,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:57:45,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:57:45,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:57:45,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:57:45,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:57:45,182 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:57:45,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:57:45,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:57:45,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:57:45,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:57:45,599 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:57:45,600 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:57:45,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-1.c [2021-02-22 01:57:45,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1cd6a731/a728dbe2d0494f90ba8cb0372d03388f/FLAGb2ea9fdbc [2021-02-22 01:57:46,365 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:57:46,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-1.c [2021-02-22 01:57:46,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1cd6a731/a728dbe2d0494f90ba8cb0372d03388f/FLAGb2ea9fdbc [2021-02-22 01:57:46,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1cd6a731/a728dbe2d0494f90ba8cb0372d03388f [2021-02-22 01:57:46,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:57:46,732 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:57:46,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:57:46,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:57:46,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:57:46,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:46" (1/1) ... [2021-02-22 01:57:46,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1247ec26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:46, skipping insertion in model container [2021-02-22 01:57:46,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:46" (1/1) ... [2021-02-22 01:57:46,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:57:46,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:57:46,958 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-1.c[704,717] [2021-02-22 01:57:46,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:57:46,972 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:57:46,994 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-1.c[704,717] [2021-02-22 01:57:46,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:57:47,014 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:57:47,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47 WrapperNode [2021-02-22 01:57:47,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:57:47,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:57:47,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:57:47,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:57:47,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ... [2021-02-22 01:57:47,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ... [2021-02-22 01:57:47,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ... [2021-02-22 01:57:47,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ... [2021-02-22 01:57:47,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ... [2021-02-22 01:57:47,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ... [2021-02-22 01:57:47,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (1/1) ... [2021-02-22 01:57:47,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:57:47,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:57:47,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:57:47,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:57:47,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (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 [2021-02-22 01:57:47,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:57:47,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:57:47,204 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:57:47,204 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-02-22 01:57:47,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:57:47,205 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:57:47,205 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:57:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:57:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:57:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 01:57:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-22 01:57:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:57:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:57:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:57:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:57:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:57:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:57:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:57:47,788 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:57:47,790 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 01:57:47,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:47 BoogieIcfgContainer [2021-02-22 01:57:47,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:57:47,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:57:47,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:57:47,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:57:47,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:57:46" (1/3) ... [2021-02-22 01:57:47,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d88ea69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:47, skipping insertion in model container [2021-02-22 01:57:47,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:47" (2/3) ... [2021-02-22 01:57:47,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d88ea69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:47, skipping insertion in model container [2021-02-22 01:57:47,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:47" (3/3) ... [2021-02-22 01:57:47,808 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-1.c [2021-02-22 01:57:47,817 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:57:47,823 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:57:47,846 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:57:47,888 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:57:47,888 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:57:47,888 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:57:47,888 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:57:47,888 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:57:47,889 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:57:47,889 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:57:47,889 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:57:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2021-02-22 01:57:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-22 01:57:47,936 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:47,937 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:57:47,938 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:47,949 INFO L82 PathProgramCache]: Analyzing trace with hash 48956364, now seen corresponding path program 1 times [2021-02-22 01:57:47,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:47,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784415934] [2021-02-22 01:57:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:48,060 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:48,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:48,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:48,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:48,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:48,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:57:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:48,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:48,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:48,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-22 01:57:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:48,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:48,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:57:48,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784415934] [2021-02-22 01:57:48,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:57:48,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 01:57:48,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57779389] [2021-02-22 01:57:48,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 01:57:48,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:57:48,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 01:57:48,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 01:57:48,513 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 3 states. [2021-02-22 01:57:48,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:57:48,659 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2021-02-22 01:57:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 01:57:48,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2021-02-22 01:57:48,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:57:48,672 INFO L225 Difference]: With dead ends: 79 [2021-02-22 01:57:48,672 INFO L226 Difference]: Without dead ends: 46 [2021-02-22 01:57:48,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 01:57:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-22 01:57:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-02-22 01:57:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-22 01:57:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-02-22 01:57:48,733 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 39 [2021-02-22 01:57:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:57:48,734 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-02-22 01:57:48,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 01:57:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-02-22 01:57:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-22 01:57:48,737 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:48,738 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:57:48,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:57:48,739 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:48,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:48,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2070724129, now seen corresponding path program 1 times [2021-02-22 01:57:48,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:48,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836359938] [2021-02-22 01:57:48,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:48,750 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:48,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:48,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:48,915 WARN L141 QuantifierPusher]: treesize reduction 15, result has 31.8 percent of original size [2021-02-22 01:57:48,916 WARN L147 QuantifierPusher]: treesize reduction 15, result has 31.8 percent of original size 7 [2021-02-22 01:57:48,926 WARN L141 QuantifierPusher]: treesize reduction 15, result has 60.5 percent of original size [2021-02-22 01:57:48,928 WARN L147 QuantifierPusher]: treesize reduction 15, result has 60.5 percent of original size 23 [2021-02-22 01:57:48,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:48,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:57:48,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:48,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:57:48,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:48,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 01:57:48,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:48,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:49,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:57:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:49,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:49,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:49,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-22 01:57:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:49,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:49,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:57:49,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836359938] [2021-02-22 01:57:49,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:57:49,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-22 01:57:49,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095895010] [2021-02-22 01:57:49,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-22 01:57:49,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:57:49,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-22 01:57:49,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-22 01:57:49,091 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 8 states. [2021-02-22 01:57:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:57:49,440 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-02-22 01:57:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 01:57:49,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2021-02-22 01:57:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:57:49,442 INFO L225 Difference]: With dead ends: 65 [2021-02-22 01:57:49,442 INFO L226 Difference]: Without dead ends: 51 [2021-02-22 01:57:49,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-02-22 01:57:49,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-22 01:57:49,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-02-22 01:57:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-22 01:57:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-02-22 01:57:49,460 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 41 [2021-02-22 01:57:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:57:49,461 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-02-22 01:57:49,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-22 01:57:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-02-22 01:57:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-22 01:57:49,463 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:49,463 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:57:49,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:57:49,464 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:49,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2025427239, now seen corresponding path program 1 times [2021-02-22 01:57:49,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:49,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835573644] [2021-02-22 01:57:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:49,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:49,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-22 01:57:49,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:49,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-22 01:57:49,520 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 01:57:49,537 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 01:57:49,542 WARN L141 QuantifierPusher]: treesize reduction 17, result has 57.5 percent of original size [2021-02-22 01:57:49,544 WARN L147 QuantifierPusher]: treesize reduction 17, result has 57.5 percent of original size 23 [2021-02-22 01:57:49,545 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 01:57:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:57:49,577 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:57:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:57:49,635 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:57:49,690 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:57:49,690 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:57:49,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 01:57:49,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:57:49 BoogieIcfgContainer [2021-02-22 01:57:49,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:57:49,717 INFO L168 Benchmark]: Toolchain (without parser) took 2994.14 ms. Allocated memory is still 152.0 MB. Free memory was 128.4 MB in the beginning and 114.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:49,719 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:57:49,724 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.40 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 117.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:49,728 INFO L168 Benchmark]: Boogie Preprocessor took 43.46 ms. Allocated memory is still 152.0 MB. Free memory was 117.2 MB in the beginning and 115.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:49,733 INFO L168 Benchmark]: RCFGBuilder took 732.04 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 98.6 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:49,733 INFO L168 Benchmark]: TraceAbstraction took 1918.82 ms. Allocated memory is still 152.0 MB. Free memory was 98.0 MB in the beginning and 114.3 MB in the end (delta: -16.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:57:49,742 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 282.40 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 117.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.46 ms. Allocated memory is still 152.0 MB. Free memory was 117.2 MB in the beginning and 115.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 732.04 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 98.6 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1918.82 ms. Allocated memory is still 152.0 MB. Free memory was 98.0 MB in the beginning and 114.3 MB in the end (delta: -16.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 38]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] struct dummy ad1[10], *ad2; [L19] int i, *pa; [L21] i = __VERIFIER_nondet_int() [L23] COND TRUE i >= 0 && i < 10 [L24] ad2 = ad1 [L25] ad1[i].a = i [L26] pa = &ad1[i].a [L27] EXPR ad2[i].a [L27] i = ad2[i].a - 10 [L28] EXPR \read(*pa) [L28] COND TRUE i < *pa [L29] ++i [L28] EXPR \read(*pa) [L28] COND FALSE !(i < *pa) [L31] CALL, EXPR check(ad1, i) [L13] EXPR ad1[b].a [L13] return ad1[b].a == b; [L31] RET, EXPR check(ad1, i) [L31] COND TRUE !check(ad1, i) [L38] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 37 SDslu, 125 SDs, 0 SdLazy, 172 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred 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, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...