/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/ms1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:04:26,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:04:26,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:04:26,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:04:26,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:04:26,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:04:26,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:04:26,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:04:26,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:04:26,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:04:26,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:04:26,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:04:26,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:04:26,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:04:26,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:04:26,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:04:26,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:04:26,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:04:26,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:04:26,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:04:26,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:04:26,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:04:26,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:04:26,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:04:26,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 18:04:26,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 18:04:26,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 18:04:26,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 18:04:26,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 18:04:26,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 18:04:26,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:04:26,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:04:26,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:04:26,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:04:26,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:04:26,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:04:26,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:04:26,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:04:26,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:04:26,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:04:26,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:04:26,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 18:04:26,085 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:04:26,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:04:26,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:04:26,087 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:04:26,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:04:26,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:04:26,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:04:26,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:04:26,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:04:26,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:04:26,088 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:04:26,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:04:26,089 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:04:26,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:04:26,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:04:26,089 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:04:26,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:04:26,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:04:26,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:04:26,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:04:26,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:04:26,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:04:26,091 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 [2020-07-17 18:04:26,374 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:04:26,386 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:04:26,390 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:04:26,391 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:04:26,391 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:04:26,392 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms1f.c [2020-07-17 18:04:26,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ca28802c/fe0fe053015643a0a8849c5885770c47/FLAG9fcb707aa [2020-07-17 18:04:26,893 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:04:26,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ms1f.c [2020-07-17 18:04:26,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ca28802c/fe0fe053015643a0a8849c5885770c47/FLAG9fcb707aa [2020-07-17 18:04:27,285 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ca28802c/fe0fe053015643a0a8849c5885770c47 [2020-07-17 18:04:27,295 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:04:27,299 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:04:27,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:04:27,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:04:27,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:04:27,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:04:27" (1/1) ... [2020-07-17 18:04:27,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aac695d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:27, skipping insertion in model container [2020-07-17 18:04:27,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:04:27" (1/1) ... [2020-07-17 18:04:27,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:04:27,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:04:27,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:04:27,546 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:04:27,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:04:27,582 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:04:27,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:27 WrapperNode [2020-07-17 18:04:27,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:04:27,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:04:27,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:04:27,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:04:27,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:27" (1/1) ... [2020-07-17 18:04:27,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:27" (1/1) ... [2020-07-17 18:04:27,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:27" (1/1) ... [2020-07-17 18:04:27,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:27" (1/1) ... [2020-07-17 18:04:27,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:27" (1/1) ... [2020-07-17 18:04:27,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:27" (1/1) ... [2020-07-17 18:04:27,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:27" (1/1) ... [2020-07-17 18:04:27,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:04:27,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:04:27,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:04:27,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:04:27,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:04:27,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:04:27,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:04:27,769 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:04:27,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:04:27,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:04:27,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:04:27,770 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:04:27,770 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:04:27,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:04:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:04:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 18:04:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:04:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 18:04:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 18:04:27,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 18:04:27,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 18:04:27,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 18:04:27,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:04:27,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:04:28,083 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:04:28,083 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-17 18:04:28,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:04:28 BoogieIcfgContainer [2020-07-17 18:04:28,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:04:28,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:04:28,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:04:28,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:04:28,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:04:27" (1/3) ... [2020-07-17 18:04:28,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a36d785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:04:28, skipping insertion in model container [2020-07-17 18:04:28,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:27" (2/3) ... [2020-07-17 18:04:28,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a36d785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:04:28, skipping insertion in model container [2020-07-17 18:04:28,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:04:28" (3/3) ... [2020-07-17 18:04:28,097 INFO L109 eAbstractionObserver]: Analyzing ICFG ms1f.c [2020-07-17 18:04:28,107 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:04:28,114 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:04:28,127 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:04:28,148 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:04:28,148 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:04:28,148 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:04:28,148 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:04:28,149 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:04:28,149 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:04:28,149 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:04:28,149 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:04:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-07-17 18:04:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 18:04:28,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:28,179 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] [2020-07-17 18:04:28,179 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash -845632023, now seen corresponding path program 1 times [2020-07-17 18:04:28,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:28,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805257256] [2020-07-17 18:04:28,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:04:28,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805257256] [2020-07-17 18:04:28,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:04:28,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 18:04:28,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990815950] [2020-07-17 18:04:28,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 18:04:28,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:28,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 18:04:28,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 18:04:28,414 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-07-17 18:04:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:28,572 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-07-17 18:04:28,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 18:04:28,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-17 18:04:28,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:28,583 INFO L225 Difference]: With dead ends: 97 [2020-07-17 18:04:28,584 INFO L226 Difference]: Without dead ends: 45 [2020-07-17 18:04:28,588 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 [2020-07-17 18:04:28,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-17 18:04:28,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-17 18:04:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 18:04:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-07-17 18:04:28,636 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 30 [2020-07-17 18:04:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:28,636 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-07-17 18:04:28,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 18:04:28,637 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-07-17 18:04:28,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 18:04:28,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:28,639 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] [2020-07-17 18:04:28,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:04:28,640 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:28,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:28,640 INFO L82 PathProgramCache]: Analyzing trace with hash 104990277, now seen corresponding path program 1 times [2020-07-17 18:04:28,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:28,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874672337] [2020-07-17 18:04:28,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:04:28,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874672337] [2020-07-17 18:04:28,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:04:28,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:04:28,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416636443] [2020-07-17 18:04:28,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:04:28,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:28,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:04:28,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:04:28,754 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 5 states. [2020-07-17 18:04:28,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:28,918 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-07-17 18:04:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:04:28,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-07-17 18:04:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:28,920 INFO L225 Difference]: With dead ends: 71 [2020-07-17 18:04:28,921 INFO L226 Difference]: Without dead ends: 53 [2020-07-17 18:04:28,922 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 [2020-07-17 18:04:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-17 18:04:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-07-17 18:04:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 18:04:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-07-17 18:04:28,936 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 30 [2020-07-17 18:04:28,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:28,937 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-07-17 18:04:28,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:04:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-07-17 18:04:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-17 18:04:28,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:28,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:04:28,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:04:28,940 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:28,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1687643347, now seen corresponding path program 1 times [2020-07-17 18:04:28,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:28,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582615497] [2020-07-17 18:04:28,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:04:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:04:29,038 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 18:04:29,038 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 18:04:29,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 18:04:29,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 06:04:29 BoogieIcfgContainer [2020-07-17 18:04:29,083 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 18:04:29,086 INFO L168 Benchmark]: Toolchain (without parser) took 1788.28 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 100.6 MB in the beginning and 90.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 72.6 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:29,087 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory is still 118.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 18:04:29,088 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.95 ms. Allocated memory is still 136.8 MB. Free memory was 100.1 MB in the beginning and 89.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:29,089 INFO L168 Benchmark]: Boogie Preprocessor took 128.01 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 89.3 MB in the beginning and 177.2 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:29,090 INFO L168 Benchmark]: RCFGBuilder took 376.51 ms. Allocated memory is still 199.8 MB. Free memory was 177.2 MB in the beginning and 158.7 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:29,091 INFO L168 Benchmark]: TraceAbstraction took 993.69 ms. Allocated memory is still 199.8 MB. Free memory was 158.7 MB in the beginning and 90.9 MB in the end (delta: 67.8 MB). Peak memory consumption was 67.8 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:29,096 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory is still 118.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.95 ms. Allocated memory is still 136.8 MB. Free memory was 100.1 MB in the beginning and 89.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.01 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 89.3 MB in the beginning and 177.2 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 376.51 ms. Allocated memory is still 199.8 MB. Free memory was 177.2 MB in the beginning and 158.7 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 993.69 ms. Allocated memory is still 199.8 MB. Free memory was 158.7 MB in the beginning and 90.9 MB in the end (delta: 67.8 MB). Peak memory consumption was 67.8 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={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] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L29] COND TRUE i