/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/eqn3f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:44:51,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:44:51,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:44:51,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:44:51,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:44:51,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:44:51,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:44:51,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:44:51,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:44:51,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:44:51,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:44:51,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:44:51,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:44:51,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:44:51,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:44:51,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:44:51,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:44:51,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:44:51,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:44:51,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:44:51,733 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 21:44:51,746 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:44:51,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:44:51,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:44:51,748 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:44:51,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:44:51,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:44:51,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:44:51,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:44:51,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:44:51,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:44:51,750 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:44:51,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:44:51,750 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:44:51,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:44:51,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:44:51,751 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:44:51,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:44:51,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:44:51,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:44:51,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:44:51,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:44:51,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:44:51,752 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:44:52,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:44:52,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:44:52,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:44:52,180 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:44:52,181 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:44:52,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn3f.c [2020-10-23 21:44:52,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68ae392db/26ec72bca34f4d4cab6054b757b64756/FLAGe157f4c42 [2020-10-23 21:44:52,994 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:44:52,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn3f.c [2020-10-23 21:44:53,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68ae392db/26ec72bca34f4d4cab6054b757b64756/FLAGe157f4c42 [2020-10-23 21:44:53,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68ae392db/26ec72bca34f4d4cab6054b757b64756 [2020-10-23 21:44:53,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:44:53,344 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:44:53,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:44:53,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:44:53,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:44:53,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:44:53" (1/1) ... [2020-10-23 21:44:53,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51e66967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:53, skipping insertion in model container [2020-10-23 21:44:53,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:44:53" (1/1) ... [2020-10-23 21:44:53,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:44:53,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:44:53,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:44:53,585 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:44:53,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:44:53,630 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:44:53,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:53 WrapperNode [2020-10-23 21:44:53,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:44:53,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:44:53,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:44:53,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:44:53,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:53" (1/1) ... [2020-10-23 21:44:53,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:53" (1/1) ... [2020-10-23 21:44:53,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:53" (1/1) ... [2020-10-23 21:44:53,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:53" (1/1) ... [2020-10-23 21:44:53,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:53" (1/1) ... [2020-10-23 21:44:53,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:53" (1/1) ... [2020-10-23 21:44:53,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:53" (1/1) ... [2020-10-23 21:44:53,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:44:53,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:44:53,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:44:53,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:44:53,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:53" (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 21:44:53,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:44:53,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:44:53,774 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:44:53,774 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 21:44:53,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:44:53,774 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:44:53,775 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:44:53,775 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:44:53,775 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:44:53,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:44:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 21:44:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:44:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 21:44:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 21:44:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:44:53,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 21:44:53,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:44:53,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:44:53,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:44:53,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:44:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:44:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:44:54,409 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:44:54,409 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 21:44:54,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:44:54 BoogieIcfgContainer [2020-10-23 21:44:54,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:44:54,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:44:54,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:44:54,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:44:54,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:44:53" (1/3) ... [2020-10-23 21:44:54,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd24ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:44:54, skipping insertion in model container [2020-10-23 21:44:54,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:53" (2/3) ... [2020-10-23 21:44:54,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd24ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:44:54, skipping insertion in model container [2020-10-23 21:44:54,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:44:54" (3/3) ... [2020-10-23 21:44:54,428 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn3f.c [2020-10-23 21:44:54,442 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:44:54,448 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:44:54,467 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:44:54,510 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:44:54,511 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:44:54,511 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:44:54,511 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:44:54,511 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:44:54,511 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:44:54,511 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:44:54,512 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:44:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-10-23 21:44:54,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 21:44:54,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:54,566 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] [2020-10-23 21:44:54,567 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:54,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:54,580 INFO L82 PathProgramCache]: Analyzing trace with hash 396138475, now seen corresponding path program 1 times [2020-10-23 21:44:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:54,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091264820] [2020-10-23 21:44:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:54,698 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:54,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:55,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 21:44:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:55,043 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 21:44:55,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091264820] [2020-10-23 21:44:55,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:55,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:44:55,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284331851] [2020-10-23 21:44:55,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:44:55,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:55,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:44:55,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:44:55,084 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 3 states. [2020-10-23 21:44:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:55,297 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-10-23 21:44:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:44:55,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-10-23 21:44:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:55,310 INFO L225 Difference]: With dead ends: 119 [2020-10-23 21:44:55,310 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 21:44:55,318 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 21:44:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 21:44:55,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-23 21:44:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 21:44:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-23 21:44:55,385 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 41 [2020-10-23 21:44:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:55,386 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-23 21:44:55,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:44:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-23 21:44:55,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 21:44:55,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:55,388 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] [2020-10-23 21:44:55,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:44:55,390 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:55,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:55,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1876757282, now seen corresponding path program 1 times [2020-10-23 21:44:55,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:55,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532711423] [2020-10-23 21:44:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:55,401 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:55,446 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-23 21:44:55,447 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 21:44:55,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:44:55,471 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-23 21:44:55,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:44:55 BoogieIcfgContainer [2020-10-23 21:44:55,472 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:44:55,475 INFO L168 Benchmark]: Toolchain (without parser) took 2139.09 ms. Allocated memory is still 161.5 MB. Free memory was 137.5 MB in the beginning and 92.3 MB in the end (delta: 45.2 MB). Peak memory consumption was 44.6 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:55,476 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 161.5 MB. Free memory was 134.6 MB in the beginning and 134.5 MB in the end (delta: 102.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:44:55,477 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.87 ms. Allocated memory is still 161.5 MB. Free memory was 136.9 MB in the beginning and 126.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:55,478 INFO L168 Benchmark]: Boogie Preprocessor took 47.25 ms. Allocated memory is still 161.5 MB. Free memory was 126.4 MB in the beginning and 124.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:55,479 INFO L168 Benchmark]: RCFGBuilder took 731.60 ms. Allocated memory is still 161.5 MB. Free memory was 124.7 MB in the beginning and 139.5 MB in the end (delta: -14.8 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:55,480 INFO L168 Benchmark]: TraceAbstraction took 1053.84 ms. Allocated memory is still 161.5 MB. Free memory was 139.0 MB in the beginning and 92.3 MB in the end (delta: 46.7 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:55,484 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 161.5 MB. Free memory was 134.6 MB in the beginning and 134.5 MB in the end (delta: 102.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 285.87 ms. Allocated memory is still 161.5 MB. Free memory was 136.9 MB in the beginning and 126.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.25 ms. Allocated memory is still 161.5 MB. Free memory was 126.4 MB in the beginning and 124.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 731.60 ms. Allocated memory is still 161.5 MB. Free memory was 124.7 MB in the beginning and 139.5 MB in the end (delta: -14.8 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1053.84 ms. Allocated memory is still 161.5 MB. Free memory was 139.0 MB in the beginning and 92.3 MB in the end (delta: 46.7 MB). Peak memory consumption was 46.1 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] a[0] = 6 [L32] b[0] = 10 [L34] i=1 [L34] COND FALSE !(i