/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/sqmf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:45:33,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:45:33,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:45:33,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:45:33,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:45:33,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:45:33,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:45:33,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:45:33,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:45:33,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:45:33,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:45:33,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:45:33,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:45:33,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:45:33,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:45:33,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:45:33,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:45:33,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:45:33,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:45:33,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:45:33,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:45:33,731 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:45:33,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:45:33,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:45:33,738 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:45:33,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:45:33,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:45:33,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:45:33,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:45:33,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:45:33,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:45:33,740 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:45:33,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:45:33,741 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:45:33,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:45:33,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:45:33,742 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:45:33,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:45:33,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:45:33,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:45:33,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:45:33,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:45:33,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:45:33,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:45:34,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:45:34,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:45:34,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:45:34,248 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:45:34,249 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:45:34,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sqmf.c [2020-10-23 21:45:34,336 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43de0ca78/002befe6f89b45fd84ee28bc7fdb0988/FLAGb843e787b [2020-10-23 21:45:35,035 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:45:35,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/sqmf.c [2020-10-23 21:45:35,044 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43de0ca78/002befe6f89b45fd84ee28bc7fdb0988/FLAGb843e787b [2020-10-23 21:45:35,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43de0ca78/002befe6f89b45fd84ee28bc7fdb0988 [2020-10-23 21:45:35,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:45:35,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:45:35,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:45:35,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:45:35,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:45:35,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:45:35" (1/1) ... [2020-10-23 21:45:35,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37da46ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:35, skipping insertion in model container [2020-10-23 21:45:35,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:45:35" (1/1) ... [2020-10-23 21:45:35,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:45:35,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:45:35,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:45:35,647 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:45:35,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:45:35,690 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:45:35,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:35 WrapperNode [2020-10-23 21:45:35,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:45:35,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:45:35,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:45:35,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:45:35,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:35" (1/1) ... [2020-10-23 21:45:35,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:35" (1/1) ... [2020-10-23 21:45:35,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:35" (1/1) ... [2020-10-23 21:45:35,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:35" (1/1) ... [2020-10-23 21:45:35,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:35" (1/1) ... [2020-10-23 21:45:35,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:35" (1/1) ... [2020-10-23 21:45:35,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:35" (1/1) ... [2020-10-23 21:45:35,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:45:35,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:45:35,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:45:35,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:45:35,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:35" (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 [2020-10-23 21:45:35,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:45:35,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:45:35,859 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:45:35,860 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 21:45:35,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:45:35,860 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:45:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:45:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:45:35,861 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:45:35,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:45:35,861 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 21:45:35,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:45:35,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 21:45:35,861 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 21:45:35,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:45:35,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 21:45:35,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:45:35,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:45:35,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:45:35,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:45:35,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:45:35,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:45:36,384 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:45:36,385 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 21:45:36,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:45:36 BoogieIcfgContainer [2020-10-23 21:45:36,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:45:36,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:45:36,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:45:36,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:45:36,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:45:35" (1/3) ... [2020-10-23 21:45:36,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee41fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:45:36, skipping insertion in model container [2020-10-23 21:45:36,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:35" (2/3) ... [2020-10-23 21:45:36,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee41fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:45:36, skipping insertion in model container [2020-10-23 21:45:36,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:45:36" (3/3) ... [2020-10-23 21:45:36,397 INFO L111 eAbstractionObserver]: Analyzing ICFG sqmf.c [2020-10-23 21:45:36,409 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:45:36,415 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:45:36,429 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:45:36,455 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:45:36,455 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:45:36,455 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:45:36,456 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:45:36,456 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:45:36,456 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:45:36,456 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:45:36,456 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:45:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2020-10-23 21:45:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-23 21:45:36,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:36,488 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] [2020-10-23 21:45:36,488 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:36,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:36,495 INFO L82 PathProgramCache]: Analyzing trace with hash -515958550, now seen corresponding path program 1 times [2020-10-23 21:45:36,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:36,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338185781] [2020-10-23 21:45:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:36,586 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:36,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:36,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 21:45:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:36,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338185781] [2020-10-23 21:45:36,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:36,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:45:36,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777019904] [2020-10-23 21:45:36,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:45:36,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:36,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:45:36,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:45:36,966 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 3 states. [2020-10-23 21:45:37,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:37,257 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2020-10-23 21:45:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:45:37,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-10-23 21:45:37,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:37,269 INFO L225 Difference]: With dead ends: 126 [2020-10-23 21:45:37,269 INFO L226 Difference]: Without dead ends: 69 [2020-10-23 21:45:37,273 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 [2020-10-23 21:45:37,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-23 21:45:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-23 21:45:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-23 21:45:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-23 21:45:37,333 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 48 [2020-10-23 21:45:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:37,334 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-23 21:45:37,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:45:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-23 21:45:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-23 21:45:37,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:37,340 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] [2020-10-23 21:45:37,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:45:37,341 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:37,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:37,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1506112989, now seen corresponding path program 1 times [2020-10-23 21:45:37,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:37,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854820759] [2020-10-23 21:45:37,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:37,358 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:37,415 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-23 21:45:37,415 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 21:45:37,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:45:37,442 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-23 21:45:37,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:45:37 BoogieIcfgContainer [2020-10-23 21:45:37,443 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:45:37,445 INFO L168 Benchmark]: Toolchain (without parser) took 2035.21 ms. Allocated memory is still 151.0 MB. Free memory was 135.5 MB in the beginning and 107.0 MB in the end (delta: 28.6 MB). Peak memory consumption was 28.7 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:37,446 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 151.0 MB. Free memory is still 126.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:45:37,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.16 ms. Allocated memory is still 151.0 MB. Free memory was 134.8 MB in the beginning and 124.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:37,448 INFO L168 Benchmark]: Boogie Preprocessor took 83.75 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 134.9 MB in the end (delta: -10.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:37,449 INFO L168 Benchmark]: RCFGBuilder took 610.78 ms. Allocated memory is still 151.0 MB. Free memory was 134.8 MB in the beginning and 114.5 MB in the end (delta: 20.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:37,450 INFO L168 Benchmark]: TraceAbstraction took 1053.96 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 107.0 MB in the end (delta: 7.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:37,454 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 151.0 MB. Free memory is still 126.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 275.16 ms. Allocated memory is still 151.0 MB. Free memory was 134.8 MB in the beginning and 124.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 83.75 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 134.9 MB in the end (delta: -10.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 610.78 ms. Allocated memory is still 151.0 MB. Free memory was 134.8 MB in the beginning and 114.5 MB in the end (delta: 20.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1053.96 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 107.0 MB in the end (delta: 7.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] b[0] = 0 [L32] a[0] = 0 [L34] i=1 [L34] COND FALSE !(i