/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 0.1.25-3af5e1f [2020-09-04 17:44:26,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:44:26,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:44:26,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:44:26,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:44:26,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:44:26,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:44:26,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:44:26,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:44:26,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:44:26,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:44:26,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:44:26,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:44:26,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:44:26,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:44:26,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:44:26,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:44:26,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:44:26,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:44:26,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:44:26,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:44:26,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:44:26,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:44:26,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:44:26,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:44:26,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:44:26,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:44:26,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:44:26,259 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:44:26,283 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:44:26,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:44:26,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:44:26,288 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:44:26,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:44:26,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:44:26,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:44:26,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:44:26,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:44:26,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:44:26,290 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:44:26,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:44:26,290 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:44:26,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:44:26,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:44:26,291 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:44:26,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:44:26,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:44:26,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:44:26,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:44:26,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:44:26,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:44:26,294 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:44:26,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:44:26,812 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:44:26,819 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:44:26,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:44:26,822 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:44:26,823 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sqmf.c [2020-09-04 17:44:26,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a280d62e1/bcd724676a0347fd9826acf1384f2c9a/FLAG1b4d87691 [2020-09-04 17:44:27,511 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:44:27,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/sqmf.c [2020-09-04 17:44:27,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a280d62e1/bcd724676a0347fd9826acf1384f2c9a/FLAG1b4d87691 [2020-09-04 17:44:27,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a280d62e1/bcd724676a0347fd9826acf1384f2c9a [2020-09-04 17:44:27,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:44:27,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:44:27,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:44:27,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:44:27,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:44:27,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:44:27" (1/1) ... [2020-09-04 17:44:27,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@544d7f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:27, skipping insertion in model container [2020-09-04 17:44:27,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:44:27" (1/1) ... [2020-09-04 17:44:27,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:44:27,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:44:28,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:44:28,154 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:44:28,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:44:28,205 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:44:28,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:28 WrapperNode [2020-09-04 17:44:28,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:44:28,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:44:28,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:44:28,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:44:28,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:28" (1/1) ... [2020-09-04 17:44:28,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:28" (1/1) ... [2020-09-04 17:44:28,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:28" (1/1) ... [2020-09-04 17:44:28,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:28" (1/1) ... [2020-09-04 17:44:28,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:28" (1/1) ... [2020-09-04 17:44:28,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:28" (1/1) ... [2020-09-04 17:44:28,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:28" (1/1) ... [2020-09-04 17:44:28,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:44:28,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:44:28,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:44:28,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:44:28,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 17:44:28,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:44:28,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:44:28,414 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 17:44:28,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:44:28,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:44:28,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:44:28,415 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 17:44:28,415 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 17:44:28,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:44:28,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 17:44:28,415 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 17:44:28,415 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:44:28,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 17:44:28,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 17:44:28,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 17:44:28,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:44:28,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:44:28,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 17:44:28,792 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:44:28,793 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 17:44:28,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:44:28 BoogieIcfgContainer [2020-09-04 17:44:28,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:44:28,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:44:28,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:44:28,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:44:28,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:44:27" (1/3) ... [2020-09-04 17:44:28,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2177c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:44:28, skipping insertion in model container [2020-09-04 17:44:28,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:28" (2/3) ... [2020-09-04 17:44:28,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2177c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:44:28, skipping insertion in model container [2020-09-04 17:44:28,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:44:28" (3/3) ... [2020-09-04 17:44:28,809 INFO L109 eAbstractionObserver]: Analyzing ICFG sqmf.c [2020-09-04 17:44:28,821 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:44:28,832 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:44:28,852 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:44:28,880 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:44:28,880 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:44:28,881 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:44:28,881 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:44:28,881 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:44:28,881 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:44:28,881 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:44:28,881 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:44:28,898 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-09-04 17:44:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 17:44:28,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:28,914 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] [2020-09-04 17:44:28,914 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:28,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1558850377, now seen corresponding path program 1 times [2020-09-04 17:44:28,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:28,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244130805] [2020-09-04 17:44:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:29,011 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:29,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:29,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 17:44:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:29,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244130805] [2020-09-04 17:44:29,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:29,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 17:44:29,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883321044] [2020-09-04 17:44:29,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 17:44:29,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:29,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 17:44:29,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:44:29,252 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 3 states. [2020-09-04 17:44:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:29,473 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-09-04 17:44:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 17:44:29,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2020-09-04 17:44:29,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:29,488 INFO L225 Difference]: With dead ends: 109 [2020-09-04 17:44:29,488 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 17:44:29,494 INFO L675 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 [2020-09-04 17:44:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 17:44:29,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-04 17:44:29,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-04 17:44:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-09-04 17:44:29,554 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 35 [2020-09-04 17:44:29,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:29,555 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-09-04 17:44:29,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 17:44:29,555 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-09-04 17:44:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 17:44:29,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:29,557 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] [2020-09-04 17:44:29,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:44:29,558 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:29,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:29,558 INFO L82 PathProgramCache]: Analyzing trace with hash -574468364, now seen corresponding path program 1 times [2020-09-04 17:44:29,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:29,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176142538] [2020-09-04 17:44:29,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:29,563 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:29,594 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-09-04 17:44:29,594 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 17:44:29,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:44:29,626 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-04 17:44:29,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:44:29 BoogieIcfgContainer [2020-09-04 17:44:29,627 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:44:29,630 INFO L168 Benchmark]: Toolchain (without parser) took 1779.81 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 102.3 MB in the beginning and 118.6 MB in the end (delta: -16.3 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2020-09-04 17:44:29,631 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 17:44:29,632 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.38 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 91.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:44:29,633 INFO L168 Benchmark]: Boogie Preprocessor took 128.11 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 91.7 MB in the beginning and 178.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-04 17:44:29,634 INFO L168 Benchmark]: RCFGBuilder took 462.86 ms. Allocated memory is still 200.3 MB. Free memory was 178.0 MB in the beginning and 159.0 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2020-09-04 17:44:29,635 INFO L168 Benchmark]: TraceAbstraction took 826.53 ms. Allocated memory is still 200.3 MB. Free memory was 158.4 MB in the beginning and 118.6 MB in the end (delta: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 7.1 GB. [2020-09-04 17:44:29,640 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 356.38 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 91.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.11 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 91.7 MB in the beginning and 178.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 462.86 ms. Allocated memory is still 200.3 MB. Free memory was 178.0 MB in the beginning and 159.0 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 826.53 ms. Allocated memory is still 200.3 MB. Free memory was 158.4 MB in the beginning and 118.6 MB in the end (delta: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: 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: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] b[0] = 0 [L30] a[0] = 0 [L32] i=1 [L32] COND FALSE !(i