/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/array-fpi/res1f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:23:47,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:23:47,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:23:47,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:23:47,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:23:47,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:23:47,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:23:47,421 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:23:47,433 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:23:47,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:23:47,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:23:47,435 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:23:47,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:23:47,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:23:47,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:23:47,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:23:47,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:23:47,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:23:47,437 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:23:47,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:23:47,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:23:47,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:23:47,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:23:47,439 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:23:47,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:23:47,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:23:47,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:23:47,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:23:47,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:23:47,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:23:47,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:23:47,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:23:47,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:23:47,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:23:47,884 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:23:47,884 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:23:47,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1f.c [2020-10-24 02:23:47,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29a241cfc/264e45dbbaf24799ad2ca05de02e2dbf/FLAG1ab80ac0a [2020-10-24 02:23:48,517 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:23:48,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res1f.c [2020-10-24 02:23:48,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29a241cfc/264e45dbbaf24799ad2ca05de02e2dbf/FLAG1ab80ac0a [2020-10-24 02:23:48,895 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29a241cfc/264e45dbbaf24799ad2ca05de02e2dbf [2020-10-24 02:23:48,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:23:48,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:23:48,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:48,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:23:48,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:23:48,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:48" (1/1) ... [2020-10-24 02:23:48,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc51e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:48, skipping insertion in model container [2020-10-24 02:23:48,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:48" (1/1) ... [2020-10-24 02:23:48,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:23:48,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:23:49,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:49,121 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:23:49,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:49,174 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:23:49,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:49 WrapperNode [2020-10-24 02:23:49,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:49,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:23:49,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:23:49,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:23:49,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:49" (1/1) ... [2020-10-24 02:23:49,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:49" (1/1) ... [2020-10-24 02:23:49,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:49" (1/1) ... [2020-10-24 02:23:49,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:49" (1/1) ... [2020-10-24 02:23:49,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:49" (1/1) ... [2020-10-24 02:23:49,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:49" (1/1) ... [2020-10-24 02:23:49,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:49" (1/1) ... [2020-10-24 02:23:49,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:23:49,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:23:49,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:23:49,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:23:49,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:49" (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 [2020-10-24 02:23:49,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:23:49,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:23:49,348 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:23:49,349 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:23:49,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:23:49,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:23:49,349 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:23:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:23:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:23:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:23:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:23:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:23:49,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:23:49,351 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 02:23:49,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:23:49,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 02:23:49,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:23:49,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:23:49,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:23:49,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:23:49,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:23:49,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:23:49,882 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:23:49,882 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-24 02:23:49,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:49 BoogieIcfgContainer [2020-10-24 02:23:49,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:23:49,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:23:49,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:23:49,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:23:49,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:23:48" (1/3) ... [2020-10-24 02:23:49,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b23f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:49, skipping insertion in model container [2020-10-24 02:23:49,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:49" (2/3) ... [2020-10-24 02:23:49,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b23f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:49, skipping insertion in model container [2020-10-24 02:23:49,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:49" (3/3) ... [2020-10-24 02:23:49,893 INFO L111 eAbstractionObserver]: Analyzing ICFG res1f.c [2020-10-24 02:23:49,904 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:23:49,910 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:23:49,923 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:23:49,950 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:23:49,950 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:23:49,950 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:23:49,950 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:23:49,950 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:23:49,951 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:23:49,951 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:23:49,951 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:23:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-10-24 02:23:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-24 02:23:49,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:49,989 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, 1, 1] [2020-10-24 02:23:49,990 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash 609850443, now seen corresponding path program 1 times [2020-10-24 02:23:50,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:50,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735534993] [2020-10-24 02:23:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:50,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:50,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:23:50,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735534993] [2020-10-24 02:23:50,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:50,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:23:50,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280522082] [2020-10-24 02:23:50,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:23:50,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:50,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:23:50,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:23:50,455 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 3 states. [2020-10-24 02:23:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:50,736 INFO L93 Difference]: Finished difference Result 141 states and 161 transitions. [2020-10-24 02:23:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:23:50,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-10-24 02:23:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:50,749 INFO L225 Difference]: With dead ends: 141 [2020-10-24 02:23:50,749 INFO L226 Difference]: Without dead ends: 68 [2020-10-24 02:23:50,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:23:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-24 02:23:50,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-24 02:23:50,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-24 02:23:50,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-24 02:23:50,809 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 43 [2020-10-24 02:23:50,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:50,810 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-24 02:23:50,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:23:50,810 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-24 02:23:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-24 02:23:50,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:50,813 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, 1, 1] [2020-10-24 02:23:50,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:23:50,813 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:50,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash -315691279, now seen corresponding path program 1 times [2020-10-24 02:23:50,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:50,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453901663] [2020-10-24 02:23:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:50,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:50,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:23:50,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453901663] [2020-10-24 02:23:50,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:50,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:23:50,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781633012] [2020-10-24 02:23:50,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:23:50,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:50,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:23:50,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:23:50,990 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 5 states. [2020-10-24 02:23:51,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:51,305 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2020-10-24 02:23:51,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:23:51,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-24 02:23:51,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:51,308 INFO L225 Difference]: With dead ends: 125 [2020-10-24 02:23:51,309 INFO L226 Difference]: Without dead ends: 92 [2020-10-24 02:23:51,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:23:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-24 02:23:51,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2020-10-24 02:23:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-24 02:23:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-24 02:23:51,328 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 43 [2020-10-24 02:23:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:51,329 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-24 02:23:51,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:23:51,329 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-24 02:23:51,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-24 02:23:51,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:51,332 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, 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] [2020-10-24 02:23:51,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:23:51,332 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:51,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:51,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1392575935, now seen corresponding path program 1 times [2020-10-24 02:23:51,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:51,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542834098] [2020-10-24 02:23:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:23:51,408 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:23:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:23:51,457 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:23:51,498 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 02:23:51,499 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:23:51,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:23:51,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:23:51 BoogieIcfgContainer [2020-10-24 02:23:51,570 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:23:51,573 INFO L168 Benchmark]: Toolchain (without parser) took 2672.00 ms. Allocated memory was 160.4 MB in the beginning and 198.2 MB in the end (delta: 37.7 MB). Free memory was 136.9 MB in the beginning and 133.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 42.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:51,574 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 160.4 MB. Free memory is still 136.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:23:51,575 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.21 ms. Allocated memory is still 160.4 MB. Free memory was 136.3 MB in the beginning and 126.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:51,575 INFO L168 Benchmark]: Boogie Preprocessor took 82.64 ms. Allocated memory is still 160.4 MB. Free memory was 126.2 MB in the beginning and 124.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:51,576 INFO L168 Benchmark]: RCFGBuilder took 624.75 ms. Allocated memory is still 160.4 MB. Free memory was 124.5 MB in the beginning and 138.0 MB in the end (delta: -13.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:51,578 INFO L168 Benchmark]: TraceAbstraction took 1684.28 ms. Allocated memory was 160.4 MB in the beginning and 198.2 MB in the end (delta: 37.7 MB). Free memory was 138.0 MB in the beginning and 133.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 43.5 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:51,582 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 160.4 MB. Free memory is still 136.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.21 ms. Allocated memory is still 160.4 MB. Free memory was 136.3 MB in the beginning and 126.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 82.64 ms. Allocated memory is still 160.4 MB. Free memory was 126.2 MB in the beginning and 124.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 624.75 ms. Allocated memory is still 160.4 MB. Free memory was 124.5 MB in the beginning and 138.0 MB in the end (delta: -13.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1684.28 ms. Allocated memory was 160.4 MB in the beginning and 198.2 MB in the end (delta: 37.7 MB). Free memory was 138.0 MB in the beginning and 133.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 43.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=51, N=0] [L23] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=1, N=1] [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L27] int i; VAL [\old(N)=0, N=1] [L28] long long sum[1]; VAL [\old(N)=0, N=1, sum={7:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-2:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={7:0}] [L30] int *b = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-2:0}, b={5:0}, malloc(sizeof(int)*N)={5:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={7:0}] [L32] sum[0] = 1 VAL [\old(N)=0, a={-2:0}, b={5:0}, malloc(sizeof(int)*N)={5:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={7:0}] [L33] i=0 VAL [\old(N)=0, a={-2:0}, b={5:0}, i=0, malloc(sizeof(int)*N)={5:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={7:0}] [L33] COND TRUE i