/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/mannadiv.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 14:06:15,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:06:15,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:06:15,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 14:06:15,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 14:06:15,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 14:06:15,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 14:06:15,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 14:06:15,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 14:06:15,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 14:06:15,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 14:06:15,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 14:06:15,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:06:15,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:06:15,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:06:15,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:06:15,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:06:15,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:06:15,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:06:15,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:06:15,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:06:15,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:06:15,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:06:15,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:06:15,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 14:06:15,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 14:06:15,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 14:06:15,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 14:06:15,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 14:06:15,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 14:06:15,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 14:06:15,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 14:06:15,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 14:06:15,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 14:06:15,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 14:06:15,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 14:06:15,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 14:06:15,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 14:06:15,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:06:15,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:06:15,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:06:15,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 14:06:15,472 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:06:15,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:06:15,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:06:15,474 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:06:15,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:06:15,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:06:15,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:06:15,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:06:15,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:06:15,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:06:15,475 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:06:15,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:06:15,476 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:06:15,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:06:15,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:06:15,476 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:06:15,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:06:15,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:06:15,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:06:15,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:06:15,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:06:15,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:06:15,478 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:06:15,764 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:06:15,779 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:06:15,782 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:06:15,784 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:06:15,784 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:06:15,785 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-07-07 14:06:15,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4426c8aa/3c5c341665714efdb7c82c41d506a520/FLAGa13665e70 [2020-07-07 14:06:16,294 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:06:16,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-07-07 14:06:16,302 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4426c8aa/3c5c341665714efdb7c82c41d506a520/FLAGa13665e70 [2020-07-07 14:06:16,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4426c8aa/3c5c341665714efdb7c82c41d506a520 [2020-07-07 14:06:16,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:06:16,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:06:16,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:06:16,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:06:16,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:06:16,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:06:16" (1/1) ... [2020-07-07 14:06:16,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c045c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:16, skipping insertion in model container [2020-07-07 14:06:16,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:06:16" (1/1) ... [2020-07-07 14:06:16,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:06:16,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:06:16,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:06:16,967 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:06:16,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:06:17,001 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:06:17,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:17 WrapperNode [2020-07-07 14:06:17,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:06:17,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:06:17,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:06:17,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:06:17,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:17" (1/1) ... [2020-07-07 14:06:17,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:17" (1/1) ... [2020-07-07 14:06:17,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:17" (1/1) ... [2020-07-07 14:06:17,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:17" (1/1) ... [2020-07-07 14:06:17,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:17" (1/1) ... [2020-07-07 14:06:17,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:17" (1/1) ... [2020-07-07 14:06:17,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:17" (1/1) ... [2020-07-07 14:06:17,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:06:17,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:06:17,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:06:17,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:06:17,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:17" (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 [2020-07-07 14:06:17,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:06:17,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:06:17,168 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 14:06:17,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 14:06:17,168 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:06:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:06:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 14:06:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 14:06:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 14:06:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:06:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:06:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:06:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:06:17,392 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:06:17,393 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 14:06:17,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:06:17 BoogieIcfgContainer [2020-07-07 14:06:17,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:06:17,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:06:17,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:06:17,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:06:17,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:06:16" (1/3) ... [2020-07-07 14:06:17,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba0add3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:06:17, skipping insertion in model container [2020-07-07 14:06:17,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:06:17" (2/3) ... [2020-07-07 14:06:17,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba0add3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:06:17, skipping insertion in model container [2020-07-07 14:06:17,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:06:17" (3/3) ... [2020-07-07 14:06:17,405 INFO L109 eAbstractionObserver]: Analyzing ICFG mannadiv.c [2020-07-07 14:06:17,416 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:06:17,424 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:06:17,438 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:06:17,459 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:06:17,459 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:06:17,459 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:06:17,459 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:06:17,459 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:06:17,459 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:06:17,460 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:06:17,460 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:06:17,474 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-07-07 14:06:17,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 14:06:17,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:17,485 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:17,486 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:17,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash 754575313, now seen corresponding path program 1 times [2020-07-07 14:06:17,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:17,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900437358] [2020-07-07 14:06:17,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 14:06:17,676 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:17,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900437358] [2020-07-07 14:06:17,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:17,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 14:06:17,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865285000] [2020-07-07 14:06:17,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 14:06:17,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:17,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 14:06:17,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 14:06:17,702 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2020-07-07 14:06:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:17,730 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2020-07-07 14:06:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 14:06:17,731 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 33 [2020-07-07 14:06:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:17,741 INFO L225 Difference]: With dead ends: 76 [2020-07-07 14:06:17,742 INFO L226 Difference]: Without dead ends: 40 [2020-07-07 14:06:17,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 14:06:17,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-07 14:06:17,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-07 14:06:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-07 14:06:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-07-07 14:06:17,803 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2020-07-07 14:06:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:17,805 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-07-07 14:06:17,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 14:06:17,806 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-07-07 14:06:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 14:06:17,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:17,808 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:17,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:06:17,809 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:17,810 INFO L82 PathProgramCache]: Analyzing trace with hash 756362773, now seen corresponding path program 1 times [2020-07-07 14:06:17,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:17,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195568724] [2020-07-07 14:06:17,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:17,835 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:17,835 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 14:06:17,836 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 14:06:17,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:06:17,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 02:06:17 BoogieIcfgContainer [2020-07-07 14:06:17,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 14:06:17,862 INFO L168 Benchmark]: Toolchain (without parser) took 1188.86 ms. Allocated memory was 134.7 MB in the beginning and 199.2 MB in the end (delta: 64.5 MB). Free memory was 100.1 MB in the beginning and 137.4 MB in the end (delta: -37.3 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:17,863 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 134.7 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 14:06:17,864 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.03 ms. Allocated memory is still 134.7 MB. Free memory was 99.9 MB in the beginning and 90.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:17,865 INFO L168 Benchmark]: Boogie Preprocessor took 108.79 ms. Allocated memory was 134.7 MB in the beginning and 199.2 MB in the end (delta: 64.5 MB). Free memory was 90.2 MB in the beginning and 179.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:17,866 INFO L168 Benchmark]: RCFGBuilder took 283.27 ms. Allocated memory is still 199.2 MB. Free memory was 178.0 MB in the beginning and 163.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:17,867 INFO L168 Benchmark]: TraceAbstraction took 460.49 ms. Allocated memory is still 199.2 MB. Free memory was 163.5 MB in the beginning and 137.4 MB in the end (delta: 26.1 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2020-07-07 14:06:17,871 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 134.7 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 326.03 ms. Allocated memory is still 134.7 MB. Free memory was 99.9 MB in the beginning and 90.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.79 ms. Allocated memory was 134.7 MB in the beginning and 199.2 MB in the end (delta: 64.5 MB). Free memory was 90.2 MB in the beginning and 179.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 283.27 ms. Allocated memory is still 199.2 MB. Free memory was 178.0 MB in the beginning and 163.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 460.49 ms. Allocated memory is still 199.2 MB. Free memory was 163.5 MB in the beginning and 137.4 MB in the end (delta: 26.1 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int x1, x2; [L22] int y1, y2, y3; [L23] x1 = __VERIFIER_nondet_int() [L24] x2 = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(x1 >= 0) [L11] COND FALSE !(!cond) [L26] RET assume_abort_if_not(x1 >= 0) [L27] CALL assume_abort_if_not(x2 != 0) [L11] COND FALSE !(!cond) [L27] RET assume_abort_if_not(x2 != 0) [L29] y1 = 0 [L30] y2 = 0 [L31] y3 = x1 [L33] COND TRUE 1 [L34] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L14] COND TRUE !(cond) [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 49 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...