/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/brs4f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:15:32,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:15:32,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:15:32,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:15:32,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:15:32,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:15:32,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:15:32,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:15:32,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:15:32,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:15:32,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:15:32,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:15:32,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:15:32,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:15:32,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:15:32,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:15:32,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:15:32,753 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 00:15:32,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:15:32,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:15:32,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:15:32,769 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:15:32,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:15:32,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:15:32,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:15:32,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:15:32,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:15:32,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:15:32,771 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:15:32,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:15:32,771 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:15:32,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:15:32,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:15:32,772 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:15:32,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:15:32,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:15:32,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:15:32,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:15:32,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:15:32,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:15:32,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:15:33,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:15:33,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:15:33,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:15:33,264 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:15:33,267 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:15:33,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4f.c [2021-02-24 00:15:33,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9f2e596c/bea9e9f54bea4ee5bb14f973411021fa/FLAG720f29a14 [2021-02-24 00:15:34,003 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:15:34,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs4f.c [2021-02-24 00:15:34,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9f2e596c/bea9e9f54bea4ee5bb14f973411021fa/FLAG720f29a14 [2021-02-24 00:15:34,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9f2e596c/bea9e9f54bea4ee5bb14f973411021fa [2021-02-24 00:15:34,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:15:34,403 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:15:34,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:15:34,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:15:34,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:15:34,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:15:34" (1/1) ... [2021-02-24 00:15:34,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742e462c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:34, skipping insertion in model container [2021-02-24 00:15:34,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:15:34" (1/1) ... [2021-02-24 00:15:34,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:15:34,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:15:34,598 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs4f.c[588,601] [2021-02-24 00:15:34,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:15:34,637 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:15:34,654 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs4f.c[588,601] [2021-02-24 00:15:34,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:15:34,707 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:15:34,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:34 WrapperNode [2021-02-24 00:15:34,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:15:34,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:15:34,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:15:34,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:15:34,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:34" (1/1) ... [2021-02-24 00:15:34,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:34" (1/1) ... [2021-02-24 00:15:34,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:34" (1/1) ... [2021-02-24 00:15:34,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:34" (1/1) ... [2021-02-24 00:15:34,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:34" (1/1) ... [2021-02-24 00:15:34,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:34" (1/1) ... [2021-02-24 00:15:34,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:34" (1/1) ... [2021-02-24 00:15:34,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:15:34,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:15:34,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:15:34,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:15:34,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:34" (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 00:15:34,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:15:34,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:15:34,963 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:15:34,963 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:15:34,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:15:34,964 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:15:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:15:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:15:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:15:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:15:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:15:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:15:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:15:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 00:15:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:15:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 00:15:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:15:34,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:15:34,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:15:34,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:15:34,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:15:34,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:15:35,515 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:15:35,516 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-24 00:15:35,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:15:35 BoogieIcfgContainer [2021-02-24 00:15:35,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:15:35,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:15:35,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:15:35,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:15:35,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:15:34" (1/3) ... [2021-02-24 00:15:35,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1373f418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:15:35, skipping insertion in model container [2021-02-24 00:15:35,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:15:34" (2/3) ... [2021-02-24 00:15:35,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1373f418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:15:35, skipping insertion in model container [2021-02-24 00:15:35,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:15:35" (3/3) ... [2021-02-24 00:15:35,533 INFO L111 eAbstractionObserver]: Analyzing ICFG brs4f.c [2021-02-24 00:15:35,542 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:15:35,549 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:15:35,572 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:15:35,609 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:15:35,609 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:15:35,609 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:15:35,610 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:15:35,610 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:15:35,610 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:15:35,610 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:15:35,610 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:15:35,634 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2021-02-24 00:15:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-24 00:15:35,652 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:15:35,653 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] [2021-02-24 00:15:35,653 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:15:35,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:15:35,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1589495831, now seen corresponding path program 1 times [2021-02-24 00:15:35,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:15:35,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575016272] [2021-02-24 00:15:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:15:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:15:35,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:35,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:35,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:35,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:36,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:15:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:15:36,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:36,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:36,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:15:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:15:36,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:36,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:36,068 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 00:15:36,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575016272] [2021-02-24 00:15:36,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:15:36,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:15:36,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062381340] [2021-02-24 00:15:36,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:15:36,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:15:36,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:15:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:15:36,094 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2021-02-24 00:15:36,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:15:36,276 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2021-02-24 00:15:36,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:15:36,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2021-02-24 00:15:36,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:15:36,289 INFO L225 Difference]: With dead ends: 107 [2021-02-24 00:15:36,290 INFO L226 Difference]: Without dead ends: 52 [2021-02-24 00:15:36,296 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 [2021-02-24 00:15:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-24 00:15:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-02-24 00:15:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-24 00:15:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-02-24 00:15:36,354 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 35 [2021-02-24 00:15:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:15:36,355 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-02-24 00:15:36,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:15:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-02-24 00:15:36,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-24 00:15:36,358 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:15:36,358 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] [2021-02-24 00:15:36,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:15:36,360 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:15:36,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:15:36,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1961847080, now seen corresponding path program 1 times [2021-02-24 00:15:36,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:15:36,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015486835] [2021-02-24 00:15:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:15:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:15:36,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:36,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:36,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:36,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:15:36,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:36,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:15:36,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:36,494 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:36,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:15:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:15:36,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:36,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:36,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:15:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:15:36,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:15:36,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:15:36,574 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 00:15:36,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015486835] [2021-02-24 00:15:36,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:15:36,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 00:15:36,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995828144] [2021-02-24 00:15:36,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:15:36,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:15:36,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:15:36,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:15:36,579 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 5 states. [2021-02-24 00:15:36,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:15:36,837 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-02-24 00:15:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:15:36,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2021-02-24 00:15:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:15:36,840 INFO L225 Difference]: With dead ends: 86 [2021-02-24 00:15:36,840 INFO L226 Difference]: Without dead ends: 61 [2021-02-24 00:15:36,841 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 [2021-02-24 00:15:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-24 00:15:36,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2021-02-24 00:15:36,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-24 00:15:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-02-24 00:15:36,858 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 35 [2021-02-24 00:15:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:15:36,859 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-02-24 00:15:36,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:15:36,859 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-02-24 00:15:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-24 00:15:36,861 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:15:36,861 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] [2021-02-24 00:15:36,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:15:36,861 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:15:36,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:15:36,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2023038414, now seen corresponding path program 1 times [2021-02-24 00:15:36,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:15:36,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480070921] [2021-02-24 00:15:36,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:15:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:15:36,905 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:15:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:15:36,938 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:15:36,984 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:15:36,984 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:15:36,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:15:37,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:15:37 BoogieIcfgContainer [2021-02-24 00:15:37,055 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:15:37,057 INFO L168 Benchmark]: Toolchain (without parser) took 2668.08 ms. Allocated memory is still 179.3 MB. Free memory was 155.5 MB in the beginning and 129.3 MB in the end (delta: 26.2 MB). Peak memory consumption was 27.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:15:37,058 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 179.3 MB. Free memory is still 154.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:15:37,059 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.45 ms. Allocated memory is still 179.3 MB. Free memory was 154.5 MB in the beginning and 144.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:15:37,060 INFO L168 Benchmark]: Boogie Preprocessor took 90.54 ms. Allocated memory is still 179.3 MB. Free memory was 144.4 MB in the beginning and 142.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:15:37,061 INFO L168 Benchmark]: RCFGBuilder took 708.39 ms. Allocated memory is still 179.3 MB. Free memory was 142.8 MB in the beginning and 157.8 MB in the end (delta: -15.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-02-24 00:15:37,062 INFO L168 Benchmark]: TraceAbstraction took 1531.97 ms. Allocated memory is still 179.3 MB. Free memory was 157.3 MB in the beginning and 129.3 MB in the end (delta: 27.9 MB). Peak memory consumption was 28.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:15:37,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 179.3 MB. Free memory is still 154.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 309.45 ms. Allocated memory is still 179.3 MB. Free memory was 154.5 MB in the beginning and 144.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 90.54 ms. Allocated memory is still 179.3 MB. Free memory was 144.4 MB in the beginning and 142.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 708.39 ms. Allocated memory is still 179.3 MB. Free memory was 142.8 MB in the beginning and 157.8 MB in the end (delta: -15.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1531.97 ms. Allocated memory is still 179.3 MB. Free memory was 157.3 MB in the beginning and 129.3 MB in the end (delta: 27.9 MB). Peak memory consumption was 28.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_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={3:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={3:0}] [L31] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={3:0}] [L31] COND TRUE i