/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/brs5f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:23:18,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:23:18,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:23:18,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:23:18,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:23:18,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:23:18,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:23:18,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:23:18,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:23:18,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:23:18,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:23:18,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:23:18,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:23:18,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:23:18,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:23:18,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:23:18,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:23:18,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:23:18,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:23:18,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:23:18,997 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 02:23:19,010 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:23:19,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:23:19,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:23:19,013 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:23:19,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:23:19,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:23:19,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:23:19,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:23:19,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:23:19,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:23:19,014 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:23:19,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:23:19,014 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:23:19,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:23:19,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:23:19,015 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:23:19,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:23:19,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:23:19,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:23:19,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:23:19,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:23:19,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:23:19,017 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:23:19,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:23:19,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:23:19,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:23:19,453 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:23:19,457 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:23:19,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs5f.c [2020-10-24 02:23:19,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/850b715ac/5044d83c70a041638e47596509053789/FLAG0421a1b7d [2020-10-24 02:23:20,279 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:23:20,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs5f.c [2020-10-24 02:23:20,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/850b715ac/5044d83c70a041638e47596509053789/FLAG0421a1b7d [2020-10-24 02:23:20,625 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/850b715ac/5044d83c70a041638e47596509053789 [2020-10-24 02:23:20,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:23:20,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:23:20,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:20,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:23:20,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:23:20,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:20" (1/1) ... [2020-10-24 02:23:20,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b7ef86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:20, skipping insertion in model container [2020-10-24 02:23:20,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:23:20" (1/1) ... [2020-10-24 02:23:20,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:23:20,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:23:20,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:20,864 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:23:20,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:23:20,909 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:23:20,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:20 WrapperNode [2020-10-24 02:23:20,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:23:20,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:23:20,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:23:20,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:23:20,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:20" (1/1) ... [2020-10-24 02:23:20,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:20" (1/1) ... [2020-10-24 02:23:20,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:20" (1/1) ... [2020-10-24 02:23:20,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:20" (1/1) ... [2020-10-24 02:23:20,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:20" (1/1) ... [2020-10-24 02:23:20,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:20" (1/1) ... [2020-10-24 02:23:20,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:20" (1/1) ... [2020-10-24 02:23:20,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:23:20,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:23:20,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:23:20,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:23:20,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:20" (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 02:23:21,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:23:21,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:23:21,055 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:23:21,056 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:23:21,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:23:21,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:23:21,056 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:23:21,056 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:23:21,057 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:23:21,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:23:21,057 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:23:21,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:23:21,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:23:21,058 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 02:23:21,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:23:21,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 02:23:21,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:23:21,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:23:21,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:23:21,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:23:21,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:23:21,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:23:21,618 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:23:21,619 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-24 02:23:21,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:21 BoogieIcfgContainer [2020-10-24 02:23:21,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:23:21,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:23:21,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:23:21,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:23:21,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:23:20" (1/3) ... [2020-10-24 02:23:21,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e6db8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:21, skipping insertion in model container [2020-10-24 02:23:21,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:23:20" (2/3) ... [2020-10-24 02:23:21,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e6db8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:23:21, skipping insertion in model container [2020-10-24 02:23:21,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:23:21" (3/3) ... [2020-10-24 02:23:21,636 INFO L111 eAbstractionObserver]: Analyzing ICFG brs5f.c [2020-10-24 02:23:21,650 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:23:21,657 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:23:21,673 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:23:21,715 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:23:21,716 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:23:21,716 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:23:21,716 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:23:21,716 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:23:21,716 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:23:21,717 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:23:21,717 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:23:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-10-24 02:23:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-24 02:23:21,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:21,761 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] [2020-10-24 02:23:21,761 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash -341341850, now seen corresponding path program 1 times [2020-10-24 02:23:21,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:21,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392237626] [2020-10-24 02:23:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:22,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:22,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:22,195 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 02:23:22,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392237626] [2020-10-24 02:23:22,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:22,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:23:22,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005095568] [2020-10-24 02:23:22,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:23:22,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:22,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:23:22,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:23:22,224 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-10-24 02:23:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:22,503 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-10-24 02:23:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:23:22,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-10-24 02:23:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:22,515 INFO L225 Difference]: With dead ends: 111 [2020-10-24 02:23:22,515 INFO L226 Difference]: Without dead ends: 53 [2020-10-24 02:23:22,519 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 02:23:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-24 02:23:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-24 02:23:22,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-24 02:23:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-24 02:23:22,591 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 36 [2020-10-24 02:23:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:22,591 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-24 02:23:22,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:23:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-24 02:23:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-24 02:23:22,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:22,594 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] [2020-10-24 02:23:22,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:23:22,594 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:22,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:22,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1000671319, now seen corresponding path program 1 times [2020-10-24 02:23:22,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:22,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491212946] [2020-10-24 02:23:22,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:22,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:23:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:22,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:23:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:23:22,788 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 02:23:22,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491212946] [2020-10-24 02:23:22,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:23:22,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:23:22,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933038095] [2020-10-24 02:23:22,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:23:22,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:23:22,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:23:22,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:23:22,793 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 5 states. [2020-10-24 02:23:23,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:23:23,236 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-24 02:23:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:23:23,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-24 02:23:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:23:23,239 INFO L225 Difference]: With dead ends: 88 [2020-10-24 02:23:23,240 INFO L226 Difference]: Without dead ends: 62 [2020-10-24 02:23:23,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:23:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-24 02:23:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-10-24 02:23:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-24 02:23:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-24 02:23:23,271 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 36 [2020-10-24 02:23:23,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:23:23,271 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-24 02:23:23,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:23:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-24 02:23:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-24 02:23:23,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:23:23,276 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] [2020-10-24 02:23:23,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:23:23,276 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:23:23,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:23:23,277 INFO L82 PathProgramCache]: Analyzing trace with hash -546938271, now seen corresponding path program 1 times [2020-10-24 02:23:23,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:23:23,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752415545] [2020-10-24 02:23:23,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:23:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:23:23,381 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:23:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:23:23,445 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:23:23,486 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 02:23:23,487 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:23:23,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:23:23,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:23:23 BoogieIcfgContainer [2020-10-24 02:23:23,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:23:23,552 INFO L168 Benchmark]: Toolchain (without parser) took 2918.40 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 83.5 MB in the end (delta: 43.7 MB). Peak memory consumption was 44.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:23,555 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 125.8 MB. Free memory is still 96.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:23:23,557 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.23 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:23,558 INFO L168 Benchmark]: Boogie Preprocessor took 45.84 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:23,560 INFO L168 Benchmark]: RCFGBuilder took 663.54 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 127.8 MB in the end (delta: -13.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:23,561 INFO L168 Benchmark]: TraceAbstraction took 1921.05 ms. Allocated memory is still 151.0 MB. Free memory was 127.6 MB in the beginning and 83.5 MB in the end (delta: 44.1 MB). Peak memory consumption was 44.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:23:23,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 125.8 MB. Free memory is still 96.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 273.23 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.84 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 663.54 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 127.8 MB in the end (delta: -13.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1921.05 ms. Allocated memory is still 151.0 MB. Free memory was 127.6 MB in the beginning and 83.5 MB in the end (delta: 44.1 MB). Peak memory consumption was 44.1 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={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