/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/condgf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:03:55,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:03:55,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:03:55,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:03:55,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:03:55,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:03:55,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:03:55,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:03:55,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:03:55,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:03:55,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:03:55,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:03:55,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:03:55,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:03:55,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:03:55,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:03:55,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:03:55,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:03:55,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:03:55,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:03:55,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:03:55,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:03:55,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:03:55,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:03:55,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 18:03:55,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 18:03:55,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 18:03:55,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 18:03:55,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 18:03:55,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 18:03:55,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:03:55,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:03:55,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:03:55,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:03:55,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:03:55,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:03:55,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:03:55,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:03:55,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:03:55,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:03:55,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:03:55,493 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 18:03:55,517 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:03:55,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:03:55,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:03:55,526 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:03:55,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:03:55,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:03:55,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:03:55,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:03:55,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:03:55,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:03:55,527 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:03:55,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:03:55,527 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:03:55,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:03:55,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:03:55,528 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:03:55,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:03:55,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:03:55,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:03:55,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:03:55,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:03:55,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:03:55,534 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 18:03:55,833 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:03:55,851 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:03:55,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:03:55,855 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:03:55,855 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:03:55,856 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condgf.c [2020-07-17 18:03:55,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aefa0a29c/0f773e8b3be243dcbf85dafe466cb233/FLAG3abec4ceb [2020-07-17 18:03:56,358 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:03:56,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condgf.c [2020-07-17 18:03:56,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aefa0a29c/0f773e8b3be243dcbf85dafe466cb233/FLAG3abec4ceb [2020-07-17 18:03:56,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aefa0a29c/0f773e8b3be243dcbf85dafe466cb233 [2020-07-17 18:03:56,797 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:03:56,800 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:03:56,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:03:56,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:03:56,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:03:56,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:03:56" (1/1) ... [2020-07-17 18:03:56,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d84263e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:56, skipping insertion in model container [2020-07-17 18:03:56,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:03:56" (1/1) ... [2020-07-17 18:03:56,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:03:56,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:03:57,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:03:57,034 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:03:57,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:03:57,070 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:03:57,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:57 WrapperNode [2020-07-17 18:03:57,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:03:57,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:03:57,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:03:57,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:03:57,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:57" (1/1) ... [2020-07-17 18:03:57,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:57" (1/1) ... [2020-07-17 18:03:57,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:57" (1/1) ... [2020-07-17 18:03:57,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:57" (1/1) ... [2020-07-17 18:03:57,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:57" (1/1) ... [2020-07-17 18:03:57,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:57" (1/1) ... [2020-07-17 18:03:57,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:57" (1/1) ... [2020-07-17 18:03:57,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:03:57,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:03:57,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:03:57,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:03:57,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:57" (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 18:03:57,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:03:57,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:03:57,250 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:03:57,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:03:57,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:03:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:03:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:03:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:03:57,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:03:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:03:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 18:03:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:03:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 18:03:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 18:03:57,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 18:03:57,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 18:03:57,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 18:03:57,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:03:57,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:03:57,572 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:03:57,573 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-17 18:03:57,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:03:57 BoogieIcfgContainer [2020-07-17 18:03:57,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:03:57,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:03:57,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:03:57,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:03:57,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:03:56" (1/3) ... [2020-07-17 18:03:57,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a83133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:03:57, skipping insertion in model container [2020-07-17 18:03:57,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:57" (2/3) ... [2020-07-17 18:03:57,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a83133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:03:57, skipping insertion in model container [2020-07-17 18:03:57,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:03:57" (3/3) ... [2020-07-17 18:03:57,598 INFO L109 eAbstractionObserver]: Analyzing ICFG condgf.c [2020-07-17 18:03:57,609 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:03:57,618 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:03:57,632 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:03:57,652 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:03:57,652 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:03:57,652 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:03:57,653 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:03:57,653 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:03:57,653 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:03:57,653 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:03:57,653 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:03:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-07-17 18:03:57,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-17 18:03:57,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:57,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:03:57,685 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:57,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:57,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1924334027, now seen corresponding path program 1 times [2020-07-17 18:03:57,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:57,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147239637] [2020-07-17 18:03:57,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:57,935 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 18:03:57,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147239637] [2020-07-17 18:03:57,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:03:57,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 18:03:57,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348169930] [2020-07-17 18:03:57,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 18:03:57,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:57,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 18:03:57,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 18:03:57,958 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-07-17 18:03:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:58,176 INFO L93 Difference]: Finished difference Result 135 states and 156 transitions. [2020-07-17 18:03:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 18:03:58,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2020-07-17 18:03:58,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:58,189 INFO L225 Difference]: With dead ends: 135 [2020-07-17 18:03:58,189 INFO L226 Difference]: Without dead ends: 67 [2020-07-17 18:03:58,194 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 18:03:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-17 18:03:58,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-07-17 18:03:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-17 18:03:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-07-17 18:03:58,249 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 35 [2020-07-17 18:03:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:58,249 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-07-17 18:03:58,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 18:03:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-07-17 18:03:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-17 18:03:58,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:58,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:03:58,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:03:58,252 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:58,253 INFO L82 PathProgramCache]: Analyzing trace with hash -977702175, now seen corresponding path program 1 times [2020-07-17 18:03:58,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:58,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233040654] [2020-07-17 18:03:58,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:58,382 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 18:03:58,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233040654] [2020-07-17 18:03:58,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:03:58,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:03:58,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540136377] [2020-07-17 18:03:58,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:03:58,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:58,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:03:58,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:03:58,386 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 5 states. [2020-07-17 18:03:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:03:58,677 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2020-07-17 18:03:58,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:03:58,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-07-17 18:03:58,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:03:58,681 INFO L225 Difference]: With dead ends: 137 [2020-07-17 18:03:58,682 INFO L226 Difference]: Without dead ends: 98 [2020-07-17 18:03:58,683 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 18:03:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-17 18:03:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2020-07-17 18:03:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-17 18:03:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-07-17 18:03:58,703 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 35 [2020-07-17 18:03:58,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:03:58,704 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-07-17 18:03:58,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:03:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-07-17 18:03:58,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-17 18:03:58,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:58,706 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] [2020-07-17 18:03:58,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:03:58,707 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:58,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:58,707 INFO L82 PathProgramCache]: Analyzing trace with hash -269448694, now seen corresponding path program 1 times [2020-07-17 18:03:58,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:58,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870952721] [2020-07-17 18:03:58,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:03:59,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870952721] [2020-07-17 18:03:59,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:03:59,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-17 18:03:59,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364390116] [2020-07-17 18:03:59,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 18:03:59,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:03:59,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 18:03:59,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-07-17 18:03:59,359 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 17 states. [2020-07-17 18:04:00,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:00,751 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2020-07-17 18:04:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 18:04:00,753 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-07-17 18:04:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:00,757 INFO L225 Difference]: With dead ends: 143 [2020-07-17 18:04:00,757 INFO L226 Difference]: Without dead ends: 115 [2020-07-17 18:04:00,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=284, Invalid=906, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 18:04:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-17 18:04:00,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2020-07-17 18:04:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-17 18:04:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2020-07-17 18:04:00,809 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 59 [2020-07-17 18:04:00,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:00,810 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2020-07-17 18:04:00,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 18:04:00,811 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2020-07-17 18:04:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-17 18:04:00,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:00,820 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] [2020-07-17 18:04:00,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 18:04:00,821 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:00,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1693383620, now seen corresponding path program 1 times [2020-07-17 18:04:00,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:00,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719718236] [2020-07-17 18:04:00,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:04:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:04:00,950 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 18:04:00,950 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 18:04:00,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 18:04:01,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 06:04:01 BoogieIcfgContainer [2020-07-17 18:04:01,008 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 18:04:01,011 INFO L168 Benchmark]: Toolchain (without parser) took 4210.91 ms. Allocated memory was 137.9 MB in the beginning and 247.5 MB in the end (delta: 109.6 MB). Free memory was 103.1 MB in the beginning and 195.2 MB in the end (delta: -92.1 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:01,012 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 137.9 MB. Free memory is still 121.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 18:04:01,012 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.64 ms. Allocated memory is still 137.9 MB. Free memory was 102.7 MB in the beginning and 91.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:01,013 INFO L168 Benchmark]: Boogie Preprocessor took 117.13 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.8 MB in the beginning and 179.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:01,014 INFO L168 Benchmark]: RCFGBuilder took 389.76 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 157.6 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:01,015 INFO L168 Benchmark]: TraceAbstraction took 3428.95 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 157.6 MB in the beginning and 195.2 MB in the end (delta: -37.6 MB). Peak memory consumption was 8.0 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:01,020 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 137.9 MB. Free memory is still 121.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.64 ms. Allocated memory is still 137.9 MB. Free memory was 102.7 MB in the beginning and 91.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.13 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.8 MB in the beginning and 179.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 389.76 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 157.6 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3428.95 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 157.6 MB in the beginning and 195.2 MB in the end (delta: -37.6 MB). Peak memory consumption was 8.0 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={5:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L29] sum[0] = 0 VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L30] COND TRUE i