/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 --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/condaf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:09:06,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:09:06,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:09:06,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:09:06,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:09:06,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:09:06,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:09:06,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:09:06,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:09:06,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:09:06,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:09:06,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:09:06,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:09:06,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:09:06,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:09:06,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:09:06,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:09:06,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:09:06,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:09:06,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:09:06,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:09:06,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:09:06,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:09:06,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:09:06,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 23:09:06,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 23:09:06,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 23:09:06,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 23:09:06,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 23:09:06,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 23:09:06,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:09:06,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:09:06,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:09:06,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:09:06,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:09:06,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:09:06,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:09:06,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:09:06,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:09:06,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:09:06,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:09:06,338 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 23:09:06,350 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:09:06,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:09:06,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:09:06,351 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:09:06,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:09:06,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:09:06,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:09:06,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:09:06,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:09:06,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:09:06,353 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:09:06,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:09:06,353 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:09:06,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:09:06,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:09:06,354 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:09:06,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:09:06,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:09:06,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:09:06,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:09:06,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:09:06,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:09:06,355 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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 [2020-09-04 23:09:06,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:09:06,811 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:09:06,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:09:06,817 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:09:06,817 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:09:06,818 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condaf.c [2020-09-04 23:09:06,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/961f8f72b/1508dfece67f49fb9685eb333d2839d3/FLAG369a46b53 [2020-09-04 23:09:07,386 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:09:07,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condaf.c [2020-09-04 23:09:07,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/961f8f72b/1508dfece67f49fb9685eb333d2839d3/FLAG369a46b53 [2020-09-04 23:09:07,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/961f8f72b/1508dfece67f49fb9685eb333d2839d3 [2020-09-04 23:09:07,745 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:09:07,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:09:07,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:07,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:09:07,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:09:07,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:07" (1/1) ... [2020-09-04 23:09:07,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45ae34dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:07, skipping insertion in model container [2020-09-04 23:09:07,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:07" (1/1) ... [2020-09-04 23:09:07,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:09:07,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:09:08,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:08,025 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:09:08,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:08,071 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:09:08,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:08 WrapperNode [2020-09-04 23:09:08,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:08,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:09:08,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:09:08,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:09:08,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:08" (1/1) ... [2020-09-04 23:09:08,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:08" (1/1) ... [2020-09-04 23:09:08,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:08" (1/1) ... [2020-09-04 23:09:08,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:08" (1/1) ... [2020-09-04 23:09:08,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:08" (1/1) ... [2020-09-04 23:09:08,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:08" (1/1) ... [2020-09-04 23:09:08,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:08" (1/1) ... [2020-09-04 23:09:08,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:09:08,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:09:08,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:09:08,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:09:08,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:08" (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 23:09:08,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:09:08,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:09:08,272 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:09:08,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:09:08,272 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:09:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:09:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:09:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:09:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:09:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:09:08,274 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 23:09:08,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:09:08,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 23:09:08,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 23:09:08,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 23:09:08,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 23:09:08,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:09:08,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:09:08,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:09:08,647 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:09:08,648 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 23:09:08,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:08 BoogieIcfgContainer [2020-09-04 23:09:08,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:09:08,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:09:08,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:09:08,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:09:08,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:09:07" (1/3) ... [2020-09-04 23:09:08,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3593aa7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:08, skipping insertion in model container [2020-09-04 23:09:08,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:08" (2/3) ... [2020-09-04 23:09:08,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3593aa7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:08, skipping insertion in model container [2020-09-04 23:09:08,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:08" (3/3) ... [2020-09-04 23:09:08,666 INFO L109 eAbstractionObserver]: Analyzing ICFG condaf.c [2020-09-04 23:09:08,678 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:09:08,688 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:09:08,711 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:09:08,741 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:09:08,741 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:09:08,741 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:09:08,742 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:09:08,742 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:09:08,742 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:09:08,742 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:09:08,743 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:09:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-09-04 23:09:08,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 23:09:08,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:08,778 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] [2020-09-04 23:09:08,779 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:08,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:08,787 INFO L82 PathProgramCache]: Analyzing trace with hash -2050446892, now seen corresponding path program 1 times [2020-09-04 23:09:08,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:08,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452451720] [2020-09-04 23:09:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:09,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:09,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:09,059 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 23:09:09,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452451720] [2020-09-04 23:09:09,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:09,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:09:09,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517130696] [2020-09-04 23:09:09,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:09:09,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:09,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:09:09,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:09:09,087 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2020-09-04 23:09:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:09,291 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-09-04 23:09:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:09:09,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-09-04 23:09:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:09,305 INFO L225 Difference]: With dead ends: 125 [2020-09-04 23:09:09,305 INFO L226 Difference]: Without dead ends: 59 [2020-09-04 23:09:09,310 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 23:09:09,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-04 23:09:09,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-09-04 23:09:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-04 23:09:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-09-04 23:09:09,366 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 33 [2020-09-04 23:09:09,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:09,367 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-09-04 23:09:09,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:09:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-09-04 23:09:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 23:09:09,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:09,369 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] [2020-09-04 23:09:09,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:09:09,369 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:09,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:09,370 INFO L82 PathProgramCache]: Analyzing trace with hash -341126016, now seen corresponding path program 1 times [2020-09-04 23:09:09,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:09,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598449495] [2020-09-04 23:09:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:09,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:09,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:09,500 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 23:09:09,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598449495] [2020-09-04 23:09:09,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:09,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:09:09,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705416322] [2020-09-04 23:09:09,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:09:09,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:09,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:09:09,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:09:09,504 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 5 states. [2020-09-04 23:09:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:09,720 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-09-04 23:09:09,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:09:09,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-09-04 23:09:09,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:09,723 INFO L225 Difference]: With dead ends: 115 [2020-09-04 23:09:09,723 INFO L226 Difference]: Without dead ends: 84 [2020-09-04 23:09:09,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:09:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-04 23:09:09,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2020-09-04 23:09:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-04 23:09:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-09-04 23:09:09,742 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 33 [2020-09-04 23:09:09,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:09,742 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-09-04 23:09:09,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:09:09,743 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-09-04 23:09:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-04 23:09:09,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:09,745 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:09,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:09:09,745 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:09,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:09,746 INFO L82 PathProgramCache]: Analyzing trace with hash 746418975, now seen corresponding path program 1 times [2020-09-04 23:09:09,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:09,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026674430] [2020-09-04 23:09:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 23:09:10,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026674430] [2020-09-04 23:09:10,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:10,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 23:09:10,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594051471] [2020-09-04 23:09:10,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 23:09:10,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:10,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 23:09:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:09:10,242 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 12 states. [2020-09-04 23:09:10,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:10,762 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2020-09-04 23:09:10,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 23:09:10,763 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-09-04 23:09:10,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:10,765 INFO L225 Difference]: With dead ends: 123 [2020-09-04 23:09:10,765 INFO L226 Difference]: Without dead ends: 92 [2020-09-04 23:09:10,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-09-04 23:09:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-04 23:09:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2020-09-04 23:09:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 23:09:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-09-04 23:09:10,780 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 57 [2020-09-04 23:09:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:10,781 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-09-04 23:09:10,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 23:09:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-09-04 23:09:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-04 23:09:10,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:10,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:10,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:09:10,783 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:10,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:10,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1569346213, now seen corresponding path program 1 times [2020-09-04 23:09:10,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:10,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681398454] [2020-09-04 23:09:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:10,821 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:10,851 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:10,902 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:09:10,903 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:09:10,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:09:10,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:09:10 BoogieIcfgContainer [2020-09-04 23:09:10,960 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:09:10,964 INFO L168 Benchmark]: Toolchain (without parser) took 3215.12 ms. Allocated memory was 136.8 MB in the beginning and 252.2 MB in the end (delta: 115.3 MB). Free memory was 101.5 MB in the beginning and 221.3 MB in the end (delta: -119.8 MB). Peak memory consumption was 119.0 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:10,965 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:09:10,965 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.21 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 90.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:10,966 INFO L168 Benchmark]: Boogie Preprocessor took 123.88 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.7 MB in the beginning and 177.9 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:10,967 INFO L168 Benchmark]: RCFGBuilder took 459.87 ms. Allocated memory is still 200.8 MB. Free memory was 177.9 MB in the beginning and 157.7 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:10,968 INFO L168 Benchmark]: TraceAbstraction took 2301.85 ms. Allocated memory was 200.8 MB in the beginning and 252.2 MB in the end (delta: 51.4 MB). Free memory was 157.7 MB in the beginning and 221.3 MB in the end (delta: -63.7 MB). Peak memory consumption was 111.2 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:10,972 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 324.21 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 90.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.88 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.7 MB in the beginning and 177.9 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 459.87 ms. Allocated memory is still 200.8 MB. Free memory was 177.9 MB in the beginning and 157.7 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2301.85 ms. Allocated memory was 200.8 MB in the beginning and 252.2 MB in the end (delta: 51.4 MB). Free memory was 157.7 MB in the beginning and 221.3 MB in the end (delta: -63.7 MB). Peak memory consumption was 111.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=6, N=0] [L21] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=1, N=1] [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; VAL [\old(N)=0, N=1] [L26] int sum[1]; VAL [\old(N)=0, N=1, sum={3:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-2:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={3:0}] [L29] sum[0] = 0 VAL [\old(N)=0, a={-2:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={3:0}] [L30] i=0 VAL [\old(N)=0, a={-2:0}, i=0, malloc(sizeof(int)*N)={-2:0}, N=1, sum={3:0}] [L30] COND TRUE i