/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/s22iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:09:50,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:09:50,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:09:50,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:09:50,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:09:50,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:09:50,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:09:50,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:09:50,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:09:50,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:09:50,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:09:50,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:09:50,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:09:50,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:09:50,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:09:50,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:09:50,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:09:50,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:09:50,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:09:50,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:09:50,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:09:50,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:09:50,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:09:50,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:09:50,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 23:09:50,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 23:09:50,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 23:09:50,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 23:09:50,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 23:09:50,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 23:09:50,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:09:50,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:09:50,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:09:50,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:09:50,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:09:50,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:09:50,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:09:50,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:09:50,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:09:50,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:09:50,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:09:50,143 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 23:09:50,155 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:09:50,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:09:50,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:09:50,157 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:09:50,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:09:50,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:09:50,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:09:50,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:09:50,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:09:50,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:09:50,158 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:09:50,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:09:50,159 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:09:50,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:09:50,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:09:50,159 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:09:50,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:09:50,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:09:50,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:09:50,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:09:50,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:09:50,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:09:50,161 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 23:09:50,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:09:50,648 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:09:50,654 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:09:50,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:09:50,657 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:09:50,658 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s22iff.c [2020-09-04 23:09:50,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e150eb8aa/ec9a606915404790aea6848e658a7ea0/FLAGdccdf8daf [2020-09-04 23:09:51,335 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:09:51,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s22iff.c [2020-09-04 23:09:51,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e150eb8aa/ec9a606915404790aea6848e658a7ea0/FLAGdccdf8daf [2020-09-04 23:09:51,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e150eb8aa/ec9a606915404790aea6848e658a7ea0 [2020-09-04 23:09:51,678 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:09:51,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:09:51,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:51,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:09:51,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:09:51,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:51" (1/1) ... [2020-09-04 23:09:51,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5783693b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:51, skipping insertion in model container [2020-09-04 23:09:51,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:51" (1/1) ... [2020-09-04 23:09:51,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:09:51,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:09:51,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:51,977 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:09:52,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:52,117 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:09:52,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:52 WrapperNode [2020-09-04 23:09:52,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:52,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:09:52,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:09:52,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:09:52,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:52" (1/1) ... [2020-09-04 23:09:52,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:52" (1/1) ... [2020-09-04 23:09:52,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:52" (1/1) ... [2020-09-04 23:09:52,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:52" (1/1) ... [2020-09-04 23:09:52,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:52" (1/1) ... [2020-09-04 23:09:52,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:52" (1/1) ... [2020-09-04 23:09:52,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:52" (1/1) ... [2020-09-04 23:09:52,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:09:52,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:09:52,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:09:52,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:09:52,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:52" (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 23:09:52,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:09:52,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:09:52,256 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:09:52,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:09:52,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:09:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:09:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:09:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:09:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:09:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:09:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 23:09:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:09:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 23:09:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 23:09:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 23:09:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 23:09:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:09:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:09:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:09:52,592 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:09:52,592 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 23:09:52,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:52 BoogieIcfgContainer [2020-09-04 23:09:52,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:09:52,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:09:52,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:09:52,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:09:52,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:09:51" (1/3) ... [2020-09-04 23:09:52,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5d04b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:52, skipping insertion in model container [2020-09-04 23:09:52,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:52" (2/3) ... [2020-09-04 23:09:52,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5d04b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:52, skipping insertion in model container [2020-09-04 23:09:52,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:52" (3/3) ... [2020-09-04 23:09:52,608 INFO L109 eAbstractionObserver]: Analyzing ICFG s22iff.c [2020-09-04 23:09:52,629 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:09:52,640 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:09:52,661 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:09:52,685 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:09:52,686 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:09:52,686 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:09:52,686 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:09:52,686 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:09:52,686 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:09:52,686 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:09:52,687 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:09:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2020-09-04 23:09:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 23:09:52,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:52,718 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 23:09:52,719 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:52,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:52,725 INFO L82 PathProgramCache]: Analyzing trace with hash 350973390, now seen corresponding path program 1 times [2020-09-04 23:09:52,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:52,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468908932] [2020-09-04 23:09:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:52,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:52,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:52,990 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 23:09:52,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468908932] [2020-09-04 23:09:52,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:52,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:09:52,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429207522] [2020-09-04 23:09:53,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:09:53,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:53,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:09:53,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:09:53,022 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 3 states. [2020-09-04 23:09:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:53,233 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2020-09-04 23:09:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:09:53,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-09-04 23:09:53,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:53,247 INFO L225 Difference]: With dead ends: 143 [2020-09-04 23:09:53,247 INFO L226 Difference]: Without dead ends: 68 [2020-09-04 23:09:53,252 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 23:09:53,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-04 23:09:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-09-04 23:09:53,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-04 23:09:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-09-04 23:09:53,311 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 33 [2020-09-04 23:09:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:53,312 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-09-04 23:09:53,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:09:53,313 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-09-04 23:09:53,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 23:09:53,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:53,314 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 23:09:53,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:09:53,315 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:53,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:53,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1688115303, now seen corresponding path program 1 times [2020-09-04 23:09:53,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:53,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312305451] [2020-09-04 23:09:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:53,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:53,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:53,480 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 23:09:53,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312305451] [2020-09-04 23:09:53,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:53,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:09:53,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905107628] [2020-09-04 23:09:53,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:09:53,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:53,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:09:53,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:09:53,485 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 5 states. [2020-09-04 23:09:53,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:53,779 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2020-09-04 23:09:53,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:09:53,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-09-04 23:09:53,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:53,782 INFO L225 Difference]: With dead ends: 142 [2020-09-04 23:09:53,782 INFO L226 Difference]: Without dead ends: 102 [2020-09-04 23:09:53,785 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 23:09:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-04 23:09:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-09-04 23:09:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-04 23:09:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-09-04 23:09:53,820 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 33 [2020-09-04 23:09:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:53,821 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-09-04 23:09:53,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:09:53,821 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-09-04 23:09:53,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-04 23:09:53,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:53,824 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, 1, 1, 1] [2020-09-04 23:09:53,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:09:53,826 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:53,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:53,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1790069826, now seen corresponding path program 1 times [2020-09-04 23:09:53,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:53,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143073264] [2020-09-04 23:09:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:53,904 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:53,948 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:54,011 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:09:54,011 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:09:54,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:09:54,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:09:54 BoogieIcfgContainer [2020-09-04 23:09:54,073 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:09:54,077 INFO L168 Benchmark]: Toolchain (without parser) took 2394.88 ms. Allocated memory was 138.4 MB in the beginning and 233.8 MB in the end (delta: 95.4 MB). Free memory was 101.3 MB in the beginning and 186.3 MB in the end (delta: -85.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:54,078 INFO L168 Benchmark]: CDTParser took 0.97 ms. Allocated memory is still 138.4 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:09:54,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 434.81 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 101.1 MB in the beginning and 180.7 MB in the end (delta: -79.7 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:54,080 INFO L168 Benchmark]: Boogie Preprocessor took 53.44 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 178.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:54,080 INFO L168 Benchmark]: RCFGBuilder took 425.85 ms. Allocated memory is still 201.9 MB. Free memory was 178.4 MB in the beginning and 157.3 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:54,081 INFO L168 Benchmark]: TraceAbstraction took 1474.42 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 156.7 MB in the beginning and 186.3 MB in the end (delta: -29.7 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:54,086 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.97 ms. Allocated memory is still 138.4 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 434.81 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 101.1 MB in the beginning and 180.7 MB in the end (delta: -79.7 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 53.44 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 178.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.85 ms. Allocated memory is still 201.9 MB. Free memory was 178.4 MB in the beginning and 157.3 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1474.42 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 156.7 MB in the beginning and 186.3 MB in the end (delta: -29.7 MB). Peak memory consumption was 2.3 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)=10, 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] long long sum[1]; VAL [\old(N)=0, N=1, sum={2:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L29] sum[0] = 1 VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L30] COND TRUE i