/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/mannadiv.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:17:18,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:17:18,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:17:18,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:17:18,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:17:18,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:17:18,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:17:18,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:17:18,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:17:18,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:17:18,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:17:18,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:17:18,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:17:18,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:17:18,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:17:18,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:17:18,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:17:18,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:17:18,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:17:18,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:17:18,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:17:18,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:17:18,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:17:18,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:17:18,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:17:18,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:17:18,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:17:18,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:17:18,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 12:17:18,503 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:17:18,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:17:18,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:17:18,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:17:18,507 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:17:18,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:17:18,507 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:17:18,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:17:18,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:17:18,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:17:18,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:17:18,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:17:18,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:17:18,509 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:17:18,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:17:18,510 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:17:18,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:17:18,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:17:18,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:17:18,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:17:18,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:17:18,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:17:18,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:17:18,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:17:18,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:17:18,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:17:18,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:17:18,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:17:18,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:17:18,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:17:18,791 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:17:18,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:17:18,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:17:18,811 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:17:18,812 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:17:18,813 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-07-17 12:17:18,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8216694/5e4de0f2ba2449fea67bfff0a67fe8b9/FLAGbe0f76d56 [2020-07-17 12:17:19,374 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:17:19,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/mannadiv.c [2020-07-17 12:17:19,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8216694/5e4de0f2ba2449fea67bfff0a67fe8b9/FLAGbe0f76d56 [2020-07-17 12:17:19,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8216694/5e4de0f2ba2449fea67bfff0a67fe8b9 [2020-07-17 12:17:19,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:17:19,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:17:19,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:17:19,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:17:19,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:17:19,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:17:19" (1/1) ... [2020-07-17 12:17:19,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c53f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:19, skipping insertion in model container [2020-07-17 12:17:19,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:17:19" (1/1) ... [2020-07-17 12:17:19,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:17:19,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:17:19,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:17:19,926 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:17:19,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:17:19,961 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:17:19,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:19 WrapperNode [2020-07-17 12:17:19,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:17:19,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:17:19,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:17:19,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:17:19,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:19" (1/1) ... [2020-07-17 12:17:19,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:19" (1/1) ... [2020-07-17 12:17:19,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:19" (1/1) ... [2020-07-17 12:17:19,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:19" (1/1) ... [2020-07-17 12:17:19,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:19" (1/1) ... [2020-07-17 12:17:19,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:19" (1/1) ... [2020-07-17 12:17:19,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:19" (1/1) ... [2020-07-17 12:17:19,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:17:19,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:17:19,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:17:19,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:17:19,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:19" (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 12:17:20,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:17:20,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:17:20,144 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:17:20,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:17:20,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:17:20,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:17:20,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:17:20,145 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:17:20,145 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:17:20,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:17:20,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:17:20,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:17:20,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:17:20,327 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:17:20,328 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 12:17:20,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:17:20 BoogieIcfgContainer [2020-07-17 12:17:20,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:17:20,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:17:20,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:17:20,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:17:20,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:17:19" (1/3) ... [2020-07-17 12:17:20,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f268f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:17:20, skipping insertion in model container [2020-07-17 12:17:20,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:17:19" (2/3) ... [2020-07-17 12:17:20,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f268f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:17:20, skipping insertion in model container [2020-07-17 12:17:20,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:17:20" (3/3) ... [2020-07-17 12:17:20,340 INFO L109 eAbstractionObserver]: Analyzing ICFG mannadiv.c [2020-07-17 12:17:20,353 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:17:20,361 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:17:20,381 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:17:20,412 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:17:20,413 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:17:20,413 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:17:20,413 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:17:20,413 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:17:20,414 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:17:20,414 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:17:20,414 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:17:20,442 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-17 12:17:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 12:17:20,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:20,450 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:20,450 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:20,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash -849943384, now seen corresponding path program 1 times [2020-07-17 12:17:20,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:20,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074727865] [2020-07-17 12:17:20,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 12:17:20,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074727865] [2020-07-17 12:17:20,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:17:20,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 12:17:20,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027365295] [2020-07-17 12:17:20,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 12:17:20,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:20,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 12:17:20,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:17:20,633 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-17 12:17:20,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:20,659 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-17 12:17:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 12:17:20,661 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-17 12:17:20,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:20,671 INFO L225 Difference]: With dead ends: 50 [2020-07-17 12:17:20,671 INFO L226 Difference]: Without dead ends: 23 [2020-07-17 12:17:20,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:17:20,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-17 12:17:20,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-17 12:17:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-17 12:17:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-17 12:17:20,720 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2020-07-17 12:17:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:20,720 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-17 12:17:20,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 12:17:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-17 12:17:20,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 12:17:20,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:20,723 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:20,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:17:20,724 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:20,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:20,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1193991140, now seen corresponding path program 1 times [2020-07-17 12:17:20,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:20,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169883443] [2020-07-17 12:17:20,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:20,744 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:17:20,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978627523] [2020-07-17 12:17:20,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:20,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-17 12:17:20,803 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 12:17:20,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169883443] [2020-07-17 12:17:20,990 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:17:20,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978627523] [2020-07-17 12:17:20,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:17:20,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 12:17:20,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913719683] [2020-07-17 12:17:20,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:17:20,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:20,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:17:20,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:17:20,995 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 8 states. [2020-07-17 12:17:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:21,130 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-17 12:17:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:17:21,131 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-07-17 12:17:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:21,133 INFO L225 Difference]: With dead ends: 34 [2020-07-17 12:17:21,134 INFO L226 Difference]: Without dead ends: 32 [2020-07-17 12:17:21,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:17:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-17 12:17:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-07-17 12:17:21,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-17 12:17:21,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-17 12:17:21,146 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-07-17 12:17:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:21,148 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-17 12:17:21,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:17:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-17 12:17:21,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 12:17:21,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:17:21,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:17:21,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 12:17:21,355 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:17:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:17:21,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1415100442, now seen corresponding path program 1 times [2020-07-17 12:17:21,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:17:21,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030923465] [2020-07-17 12:17:21,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:17:21,381 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:17:21,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594814119] [2020-07-17 12:17:21,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:17:21,426 INFO L264 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-17 12:17:21,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:17:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 12:17:21,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030923465] [2020-07-17 12:17:21,499 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:17:21,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594814119] [2020-07-17 12:17:21,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:17:21,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 12:17:21,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973340687] [2020-07-17 12:17:21,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:17:21,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:17:21,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:17:21,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:17:21,502 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-07-17 12:17:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:17:21,596 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-07-17 12:17:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:17:21,597 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-17 12:17:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:17:21,598 INFO L225 Difference]: With dead ends: 29 [2020-07-17 12:17:21,598 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 12:17:21,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:17:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 12:17:21,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 12:17:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 12:17:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 12:17:21,600 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-07-17 12:17:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:17:21,601 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 12:17:21,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:17:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 12:17:21,601 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 12:17:21,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:17:21,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 12:17:21,887 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 12:17:21,887 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:17:21,888 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:17:21,888 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 12:17:21,888 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 12:17:21,888 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:17:21,888 INFO L271 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2020-07-17 12:17:21,889 INFO L268 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-07-17 12:17:21,889 INFO L268 CegarLoopResult]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2020-07-17 12:17:21,889 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2020-07-17 12:17:21,889 INFO L264 CegarLoopResult]: At program point L33-2(lines 33 46) the Hoare annotation is: (let ((.cse0 (* main_~y1~0 main_~x2~0))) (and (= (+ main_~y2~0 .cse0) main_~x1~0) (not (= 0 main_~x2~0)) (= (+ main_~y2~0 main_~y3~0 .cse0) main_~x1~0))) [2020-07-17 12:17:21,889 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-17 12:17:21,890 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2020-07-17 12:17:21,890 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2020-07-17 12:17:21,890 INFO L268 CegarLoopResult]: For program point L38(lines 38 45) no Hoare annotation was computed. [2020-07-17 12:17:21,890 INFO L264 CegarLoopResult]: At program point L38-2(lines 33 46) the Hoare annotation is: (and (not (= 0 main_~x2~0)) (= (+ main_~y2~0 main_~y3~0 (* main_~y1~0 main_~x2~0)) main_~x1~0)) [2020-07-17 12:17:21,891 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (not (= 0 main_~x2~0)) (= (+ main_~y2~0 main_~y3~0 (* main_~y1~0 main_~x2~0)) main_~x1~0)) [2020-07-17 12:17:21,891 INFO L268 CegarLoopResult]: For program point L34-1(lines 33 46) no Hoare annotation was computed. [2020-07-17 12:17:21,891 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2020-07-17 12:17:21,891 INFO L271 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-07-17 12:17:21,891 INFO L271 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: true [2020-07-17 12:17:21,891 INFO L268 CegarLoopResult]: For program point L47(line 47) no Hoare annotation was computed. [2020-07-17 12:17:21,892 INFO L268 CegarLoopResult]: For program point L15(lines 15 16) no Hoare annotation was computed. [2020-07-17 12:17:21,892 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2020-07-17 12:17:21,892 INFO L268 CegarLoopResult]: For program point L14(lines 14 17) no Hoare annotation was computed. [2020-07-17 12:17:21,892 INFO L268 CegarLoopResult]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2020-07-17 12:17:21,892 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2020-07-17 12:17:21,908 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-17 12:17:21,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:17:21 BoogieIcfgContainer [2020-07-17 12:17:21,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:17:21,931 INFO L168 Benchmark]: Toolchain (without parser) took 2200.09 ms. Allocated memory was 144.2 MB in the beginning and 232.8 MB in the end (delta: 88.6 MB). Free memory was 101.2 MB in the beginning and 203.5 MB in the end (delta: -102.3 MB). Peak memory consumption was 79.3 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:21,932 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 144.2 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-17 12:17:21,933 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.69 ms. Allocated memory is still 144.2 MB. Free memory was 100.9 MB in the beginning and 91.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:21,934 INFO L168 Benchmark]: Boogie Preprocessor took 33.40 ms. Allocated memory is still 144.2 MB. Free memory was 91.3 MB in the beginning and 89.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:21,935 INFO L168 Benchmark]: RCFGBuilder took 336.42 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 89.7 MB in the beginning and 167.8 MB in the end (delta: -78.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:21,936 INFO L168 Benchmark]: TraceAbstraction took 1594.34 ms. Allocated memory was 201.3 MB in the beginning and 232.8 MB in the end (delta: 31.5 MB). Free memory was 167.8 MB in the beginning and 203.5 MB in the end (delta: -35.6 MB). Peak memory consumption was 88.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:17:21,940 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 144.2 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.69 ms. Allocated memory is still 144.2 MB. Free memory was 100.9 MB in the beginning and 91.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.40 ms. Allocated memory is still 144.2 MB. Free memory was 91.3 MB in the beginning and 89.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 336.42 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 89.7 MB in the beginning and 167.8 MB in the end (delta: -78.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1594.34 ms. Allocated memory was 201.3 MB in the beginning and 232.8 MB in the end (delta: 31.5 MB). Free memory was 167.8 MB in the beginning and 203.5 MB in the end (delta: -35.6 MB). Peak memory consumption was 88.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: !(0 == x2) && y2 + y3 + y1 * x2 == x1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 28 SDslu, 159 SDs, 0 SdLazy, 106 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=2, 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, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 17 PreInvPairs, 23 NumberOfFragments, 54 HoareAnnotationTreeSize, 17 FomulaSimplifications, 61 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 2946 SizeOfPredicates, 7 NumberOfNonLiveVariables, 115 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 13/14 InterpolantCoveringCapability, 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 correct! Received shutdown request...