/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/loops/count_up_down-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:16:30,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:30,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:30,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:30,954 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 00:16:30,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:30,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:30,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:30,985 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:30,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:30,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:30,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:30,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:30,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:30,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:30,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:30,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:30,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:30,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:30,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:30,989 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:30,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:30,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:30,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:30,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:30,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:30,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:30,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:31,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:31,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:31,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:31,468 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:31,469 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:31,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/count_up_down-2.c [2021-02-24 00:16:31,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a783f02/e4d0f5c986264e59bc97a6deac5eccb3/FLAG8bcdaac57 [2021-02-24 00:16:32,214 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:32,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/count_up_down-2.c [2021-02-24 00:16:32,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a783f02/e4d0f5c986264e59bc97a6deac5eccb3/FLAG8bcdaac57 [2021-02-24 00:16:32,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a783f02/e4d0f5c986264e59bc97a6deac5eccb3 [2021-02-24 00:16:32,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:32,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:32,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:32,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:32,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:32,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:32" (1/1) ... [2021-02-24 00:16:32,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@753f314c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:32, skipping insertion in model container [2021-02-24 00:16:32,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:32" (1/1) ... [2021-02-24 00:16:32,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:32,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:16:32,842 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/count_up_down-2.c[327,340] [2021-02-24 00:16:32,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:32,875 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:16:32,888 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/count_up_down-2.c[327,340] [2021-02-24 00:16:32,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:32,908 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:16:32,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:32 WrapperNode [2021-02-24 00:16:32,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:32,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:16:32,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:16:32,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:16:32,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:32" (1/1) ... [2021-02-24 00:16:32,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:32" (1/1) ... [2021-02-24 00:16:32,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:32" (1/1) ... [2021-02-24 00:16:32,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:32" (1/1) ... [2021-02-24 00:16:32,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:32" (1/1) ... [2021-02-24 00:16:32,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:32" (1/1) ... [2021-02-24 00:16:32,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:32" (1/1) ... [2021-02-24 00:16:32,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:16:32,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:16:32,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:16:32,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:16:32,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:32" (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 00:16:33,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:16:33,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:16:33,050 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:16:33,050 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:16:33,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:16:33,051 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:16:33,051 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:16:33,051 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:16:33,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:16:33,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:16:33,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-24 00:16:33,052 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:16:33,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:16:33,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:16:33,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:16:33,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:16:33,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:16:33,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:16:33,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:16:33,369 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:16:33,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:33 BoogieIcfgContainer [2021-02-24 00:16:33,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:16:33,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:16:33,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:16:33,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:16:33,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:32" (1/3) ... [2021-02-24 00:16:33,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c25755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:33, skipping insertion in model container [2021-02-24 00:16:33,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:32" (2/3) ... [2021-02-24 00:16:33,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c25755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:33, skipping insertion in model container [2021-02-24 00:16:33,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:33" (3/3) ... [2021-02-24 00:16:33,393 INFO L111 eAbstractionObserver]: Analyzing ICFG count_up_down-2.c [2021-02-24 00:16:33,406 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:16:33,413 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:16:33,456 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:16:33,539 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:16:33,539 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:16:33,540 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:16:33,540 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:16:33,540 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:16:33,540 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:16:33,540 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:16:33,541 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:16:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2021-02-24 00:16:33,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-24 00:16:33,576 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:33,577 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 00:16:33,578 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:33,587 INFO L82 PathProgramCache]: Analyzing trace with hash -645714658, now seen corresponding path program 1 times [2021-02-24 00:16:33,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:33,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638038714] [2021-02-24 00:16:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:33,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:33,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:33,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:33,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:34,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:34,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:34,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:34,106 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 00:16:34,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638038714] [2021-02-24 00:16:34,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:34,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:16:34,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528804353] [2021-02-24 00:16:34,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:16:34,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:34,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:16:34,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:34,143 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2021-02-24 00:16:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:34,281 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-02-24 00:16:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:16:34,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-02-24 00:16:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:34,296 INFO L225 Difference]: With dead ends: 46 [2021-02-24 00:16:34,297 INFO L226 Difference]: Without dead ends: 28 [2021-02-24 00:16:34,305 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 00:16:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-24 00:16:34,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-02-24 00:16:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-02-24 00:16:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-02-24 00:16:34,380 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 21 [2021-02-24 00:16:34,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:34,382 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-02-24 00:16:34,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:16:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-02-24 00:16:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-24 00:16:34,384 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:34,384 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 00:16:34,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:16:34,385 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash -654949868, now seen corresponding path program 1 times [2021-02-24 00:16:34,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:34,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877743334] [2021-02-24 00:16:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:34,471 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:34,525 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:34,569 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:16:34,569 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:16:34,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:16:34,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:16:34 BoogieIcfgContainer [2021-02-24 00:16:34,629 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:16:34,634 INFO L168 Benchmark]: Toolchain (without parser) took 2035.86 ms. Allocated memory is still 165.7 MB. Free memory was 142.7 MB in the beginning and 116.7 MB in the end (delta: 26.0 MB). Peak memory consumption was 25.8 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:34,635 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 165.7 MB. Free memory is still 141.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:16:34,638 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.92 ms. Allocated memory is still 165.7 MB. Free memory was 141.5 MB in the beginning and 132.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:34,640 INFO L168 Benchmark]: Boogie Preprocessor took 37.16 ms. Allocated memory is still 165.7 MB. Free memory was 132.3 MB in the beginning and 130.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:34,641 INFO L168 Benchmark]: RCFGBuilder took 422.39 ms. Allocated memory is still 165.7 MB. Free memory was 130.9 MB in the beginning and 117.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:34,644 INFO L168 Benchmark]: TraceAbstraction took 1253.84 ms. Allocated memory is still 165.7 MB. Free memory was 116.9 MB in the beginning and 116.7 MB in the end (delta: 123.8 kB). Peak memory consumption was 646.1 kB. Max. memory is 8.0 GB. [2021-02-24 00:16:34,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 165.7 MB. Free memory is still 141.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 293.92 ms. Allocated memory is still 165.7 MB. Free memory was 141.5 MB in the beginning and 132.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.16 ms. Allocated memory is still 165.7 MB. Free memory was 132.3 MB in the beginning and 130.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 422.39 ms. Allocated memory is still 165.7 MB. Free memory was 130.9 MB in the beginning and 117.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1253.84 ms. Allocated memory is still 165.7 MB. Free memory was 116.9 MB in the beginning and 116.7 MB in the end (delta: 123.8 kB). Peak memory consumption was 646.1 kB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] unsigned int n = __VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=0, n=0] [L16] unsigned int x=n, y=0; VAL [n=0, x=0, y=0] [L17] COND FALSE !(x>0) VAL [n=0, x=0, y=0] [L22] CALL __VERIFIER_assert(y!=n) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 18 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 1000 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...