/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:49:10,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:49:10,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:49:10,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:49:10,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:49:10,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:49:10,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:49:10,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:49:10,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:49:10,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:49:10,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:49:10,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:49:10,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:49:10,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:49:10,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:49:10,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:49:10,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:49:10,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:49:10,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:49:11,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:49:11,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:49:11,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:49:11,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:49:11,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:49:11,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:49:11,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:49:11,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:49:11,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:49:11,031 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 [2020-07-20 11:49:11,071 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:49:11,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:49:11,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:49:11,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:49:11,073 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:49:11,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:49:11,077 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:49:11,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:49:11,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:49:11,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:49:11,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:49:11,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:49:11,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:49:11,078 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:49:11,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:49:11,078 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:49:11,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:49:11,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:49:11,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:49:11,079 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:49:11,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:49:11,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:49:11,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:49:11,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:49:11,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:49:11,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:49:11,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:11,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:49:11,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:49:11,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:49:11,382 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:49:11,398 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:49:11,402 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:49:11,403 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:49:11,404 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:49:11,405 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_3-2.c [2020-07-20 11:49:11,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab5c90e03/147c1cc8788c4aa1ae880d93ec013322/FLAG311eebfd9 [2020-07-20 11:49:11,961 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:49:11,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_3-2.c [2020-07-20 11:49:11,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab5c90e03/147c1cc8788c4aa1ae880d93ec013322/FLAG311eebfd9 [2020-07-20 11:49:12,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab5c90e03/147c1cc8788c4aa1ae880d93ec013322 [2020-07-20 11:49:12,301 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:49:12,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:49:12,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:49:12,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:49:12,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:49:12,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:49:12" (1/1) ... [2020-07-20 11:49:12,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@730ed28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:12, skipping insertion in model container [2020-07-20 11:49:12,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:49:12" (1/1) ... [2020-07-20 11:49:12,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:49:12,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:49:12,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:49:12,531 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:49:12,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:49:12,556 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:49:12,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:12 WrapperNode [2020-07-20 11:49:12,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:49:12,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:49:12,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:49:12,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:49:12,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:12" (1/1) ... [2020-07-20 11:49:12,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:12" (1/1) ... [2020-07-20 11:49:12,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:12" (1/1) ... [2020-07-20 11:49:12,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:12" (1/1) ... [2020-07-20 11:49:12,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:12" (1/1) ... [2020-07-20 11:49:12,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:12" (1/1) ... [2020-07-20 11:49:12,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:12" (1/1) ... [2020-07-20 11:49:12,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:49:12,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:49:12,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:49:12,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:49:12,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:12" (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 [2020-07-20 11:49:12,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:49:12,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:49:12,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:49:12,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:49:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:49:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2020-07-20 11:49:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:49:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:49:12,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:49:12,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:49:12,975 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:49:12,975 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:49:12,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:49:12 BoogieIcfgContainer [2020-07-20 11:49:12,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:49:12,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:49:12,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:49:12,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:49:12,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:49:12" (1/3) ... [2020-07-20 11:49:12,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41952a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:49:12, skipping insertion in model container [2020-07-20 11:49:12,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:12" (2/3) ... [2020-07-20 11:49:12,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41952a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:49:12, skipping insertion in model container [2020-07-20 11:49:12,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:49:12" (3/3) ... [2020-07-20 11:49:12,998 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_3-2.c [2020-07-20 11:49:13,011 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:49:13,024 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:49:13,042 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:49:13,073 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:49:13,073 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:49:13,074 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:49:13,075 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:49:13,075 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:49:13,075 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:49:13,075 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:49:13,075 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:49:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-20 11:49:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 11:49:13,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:13,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:13,113 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:13,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-07-20 11:49:13,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:13,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469909760] [2020-07-20 11:49:13,132 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:13,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:49:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:13,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:49:13,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469909760] [2020-07-20 11:49:13,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:49:13,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:49:13,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844760544] [2020-07-20 11:49:13,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:49:13,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:49:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:49:13,328 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-07-20 11:49:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:13,452 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-20 11:49:13,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:49:13,454 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 11:49:13,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:13,461 INFO L225 Difference]: With dead ends: 36 [2020-07-20 11:49:13,462 INFO L226 Difference]: Without dead ends: 12 [2020-07-20 11:49:13,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:49:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-20 11:49:13,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-20 11:49:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-20 11:49:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-20 11:49:13,508 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-20 11:49:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:13,509 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-20 11:49:13,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:49:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-20 11:49:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:49:13,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:13,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:13,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:13,725 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:13,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:13,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-07-20 11:49:13,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:13,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203578859] [2020-07-20 11:49:13,729 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:13,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:49:13,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:13,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:49:13,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:49:13,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:49:13,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:49:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:49:13,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203578859] [2020-07-20 11:49:13,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 11:49:13,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-07-20 11:49:13,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701080223] [2020-07-20 11:49:13,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:49:13,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:49:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:49:13,905 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2020-07-20 11:49:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:13,931 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-07-20 11:49:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:49:13,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-20 11:49:13,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:13,932 INFO L225 Difference]: With dead ends: 12 [2020-07-20 11:49:13,932 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:49:13,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:49:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:49:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:49:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:49:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:49:13,935 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-07-20 11:49:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:13,936 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:49:13,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:49:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:49:13,936 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:49:14,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:14,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:49:14,273 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:49:14,273 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:49:14,274 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:49:14,274 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:49:14,274 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:49:14,274 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:49:14,275 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 20) the Hoare annotation is: true [2020-07-20 11:49:14,282 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 20) no Hoare annotation was computed. [2020-07-20 11:49:14,283 INFO L264 CegarLoopResult]: At program point L15-2(lines 15 17) the Hoare annotation is: (= 0 (mod main_~x~0 2)) [2020-07-20 11:49:14,283 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 20) no Hoare annotation was computed. [2020-07-20 11:49:14,283 INFO L264 CegarLoopResult]: At program point L15-3(lines 15 17) the Hoare annotation is: (= 0 (mod main_~x~0 2)) [2020-07-20 11:49:14,283 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2020-07-20 11:49:14,284 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2020-07-20 11:49:14,284 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-07-20 11:49:14,284 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-07-20 11:49:14,285 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-07-20 11:49:14,285 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2020-07-20 11:49:14,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:49:14 BoogieIcfgContainer [2020-07-20 11:49:14,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:49:14,334 INFO L168 Benchmark]: Toolchain (without parser) took 2027.89 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 103.3 MB in the beginning and 121.1 MB in the end (delta: -17.8 MB). Peak memory consumption was 39.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:49:14,335 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 11:49:14,341 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.13 ms. Allocated memory is still 146.3 MB. Free memory was 102.9 MB in the beginning and 93.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:49:14,342 INFO L168 Benchmark]: Boogie Preprocessor took 113.27 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 93.6 MB in the beginning and 183.6 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:49:14,343 INFO L168 Benchmark]: RCFGBuilder took 312.59 ms. Allocated memory is still 203.4 MB. Free memory was 183.6 MB in the beginning and 170.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:49:14,346 INFO L168 Benchmark]: TraceAbstraction took 1342.08 ms. Allocated memory is still 203.4 MB. Free memory was 170.9 MB in the beginning and 121.1 MB in the end (delta: 49.8 MB). Peak memory consumption was 49.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:49:14,355 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.13 ms. Allocated memory is still 146.3 MB. Free memory was 102.9 MB in the beginning and 93.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.27 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 93.6 MB in the beginning and 183.6 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.59 ms. Allocated memory is still 203.4 MB. Free memory was 183.6 MB in the beginning and 170.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1342.08 ms. Allocated memory is still 203.4 MB. Free memory was 170.9 MB in the beginning and 121.1 MB in the end (delta: 49.8 MB). Peak memory consumption was 49.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 15]: Loop Invariant Derived loop invariant: 0 == x % 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 7 SDslu, 53 SDs, 0 SdLazy, 28 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 12 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 10 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 613 SizeOfPredicates, 4 NumberOfNonLiveVariables, 51 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/2 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...