/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/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:12:01,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:12:01,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:12:01,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:12:01,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:12:01,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:12:01,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:12:01,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:12:01,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:12:01,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:12:01,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:12:01,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:12:01,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:12:01,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:12:01,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:12:01,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:12:01,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:12:01,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:12:01,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:12:01,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:12:01,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:12:01,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:12:01,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:12:01,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:12:01,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:12:01,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:12:01,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:12:01,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:12:01,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:12:01,206 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:12:01,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:12:01,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:12:01,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:12:01,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:12:01,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:12:01,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:12:01,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:12:01,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:12:01,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:12:01,211 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:12:01,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:12:01,212 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:12:01,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:12:01,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:12:01,213 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:12:01,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:12:01,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:12:01,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:12:01,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:12:01,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:12:01,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:12:01,214 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:12:01,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:12:01,641 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:12:01,644 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:12:01,646 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:12:01,646 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:12:01,647 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-04 16:12:01,733 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/055a1554d/13fe19648913402eb0d3c067717286c1/FLAGe18736479 [2020-09-04 16:12:02,272 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:12:02,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-04 16:12:02,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/055a1554d/13fe19648913402eb0d3c067717286c1/FLAGe18736479 [2020-09-04 16:12:02,607 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/055a1554d/13fe19648913402eb0d3c067717286c1 [2020-09-04 16:12:02,621 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:12:02,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:12:02,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:12:02,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:12:02,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:12:02,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:12:02" (1/1) ... [2020-09-04 16:12:02,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a03fc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:02, skipping insertion in model container [2020-09-04 16:12:02,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:12:02" (1/1) ... [2020-09-04 16:12:02,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:12:02,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:12:02,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:12:02,923 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:12:02,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:12:02,963 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:12:02,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:02 WrapperNode [2020-09-04 16:12:02,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:12:02,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:12:02,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:12:02,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:12:02,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:02" (1/1) ... [2020-09-04 16:12:02,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:02" (1/1) ... [2020-09-04 16:12:02,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:02" (1/1) ... [2020-09-04 16:12:02,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:02" (1/1) ... [2020-09-04 16:12:03,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:02" (1/1) ... [2020-09-04 16:12:03,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:02" (1/1) ... [2020-09-04 16:12:03,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:02" (1/1) ... [2020-09-04 16:12:03,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:12:03,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:12:03,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:12:03,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:12:03,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 16:12:03,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:12:03,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:12:03,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 16:12:03,158 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:12:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:12:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 16:12:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 16:12:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:12:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:12:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:12:03,458 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:12:03,458 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 16:12:03,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:12:03 BoogieIcfgContainer [2020-09-04 16:12:03,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:12:03,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:12:03,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:12:03,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:12:03,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:12:02" (1/3) ... [2020-09-04 16:12:03,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23353c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:12:03, skipping insertion in model container [2020-09-04 16:12:03,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:02" (2/3) ... [2020-09-04 16:12:03,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23353c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:12:03, skipping insertion in model container [2020-09-04 16:12:03,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:12:03" (3/3) ... [2020-09-04 16:12:03,473 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-09-04 16:12:03,505 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:12:03,521 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:12:03,541 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:12:03,564 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:12:03,564 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:12:03,564 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:12:03,564 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:12:03,565 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:12:03,565 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:12:03,565 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:12:03,565 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:12:03,580 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-09-04 16:12:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-04 16:12:03,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:12:03,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:12:03,593 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:12:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:12:03,600 INFO L82 PathProgramCache]: Analyzing trace with hash -7732671, now seen corresponding path program 1 times [2020-09-04 16:12:03,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:12:03,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955069694] [2020-09-04 16:12:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:12:03,675 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:12:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:12:03,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:12:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:12:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:12:03,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955069694] [2020-09-04 16:12:03,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:12:03,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 16:12:03,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437436170] [2020-09-04 16:12:03,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 16:12:03,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:12:03,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 16:12:03,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 16:12:03,773 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 2 states. [2020-09-04 16:12:03,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:12:03,808 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-09-04 16:12:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 16:12:03,809 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-04 16:12:03,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:12:03,820 INFO L225 Difference]: With dead ends: 62 [2020-09-04 16:12:03,820 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 16:12:03,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 16:12:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 16:12:03,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-04 16:12:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 16:12:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-09-04 16:12:03,879 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 12 [2020-09-04 16:12:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:12:03,879 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-09-04 16:12:03,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 16:12:03,880 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-09-04 16:12:03,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-04 16:12:03,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:12:03,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:12:03,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:12:03,882 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:12:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:12:03,882 INFO L82 PathProgramCache]: Analyzing trace with hash -87155477, now seen corresponding path program 1 times [2020-09-04 16:12:03,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:12:03,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932783024] [2020-09-04 16:12:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:12:03,885 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:12:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:12:04,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:12:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:12:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:12:04,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932783024] [2020-09-04 16:12:04,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:12:04,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:12:04,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318909416] [2020-09-04 16:12:04,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:12:04,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:12:04,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:12:04,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:12:04,010 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 3 states. [2020-09-04 16:12:04,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:12:04,100 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-09-04 16:12:04,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:12:04,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-04 16:12:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:12:04,102 INFO L225 Difference]: With dead ends: 55 [2020-09-04 16:12:04,102 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 16:12:04,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:12:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 16:12:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-09-04 16:12:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 16:12:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-09-04 16:12:04,116 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 12 [2020-09-04 16:12:04,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:12:04,116 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-09-04 16:12:04,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:12:04,117 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-09-04 16:12:04,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 16:12:04,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:12:04,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:12:04,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:12:04,119 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:12:04,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:12:04,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1575516068, now seen corresponding path program 1 times [2020-09-04 16:12:04,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:12:04,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708628623] [2020-09-04 16:12:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:12:04,141 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:12:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:12:04,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:12:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:12:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:12:04,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708628623] [2020-09-04 16:12:04,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:12:04,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:12:04,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450306977] [2020-09-04 16:12:04,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:12:04,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:12:04,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:12:04,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:12:04,189 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 3 states. [2020-09-04 16:12:04,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:12:04,306 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2020-09-04 16:12:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:12:04,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-09-04 16:12:04,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:12:04,310 INFO L225 Difference]: With dead ends: 96 [2020-09-04 16:12:04,311 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 16:12:04,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:12:04,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 16:12:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-04 16:12:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 16:12:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-09-04 16:12:04,325 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 33 [2020-09-04 16:12:04,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:12:04,325 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-09-04 16:12:04,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:12:04,325 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-09-04 16:12:04,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 16:12:04,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:12:04,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:12:04,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:12:04,330 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:12:04,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:12:04,331 INFO L82 PathProgramCache]: Analyzing trace with hash 132907260, now seen corresponding path program 1 times [2020-09-04 16:12:04,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:12:04,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523203420] [2020-09-04 16:12:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:12:04,363 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:12:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:12:04,423 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:12:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:12:04,446 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:12:04,469 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:12:04,469 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:12:04,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:12:04,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:12:04 BoogieIcfgContainer [2020-09-04 16:12:04,489 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:12:04,493 INFO L168 Benchmark]: Toolchain (without parser) took 1869.11 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 104.2 MB in the beginning and 109.8 MB in the end (delta: -5.6 MB). Peak memory consumption was 57.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:12:04,494 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:12:04,495 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.89 ms. Allocated memory is still 140.0 MB. Free memory was 104.0 MB in the beginning and 93.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-04 16:12:04,496 INFO L168 Benchmark]: Boogie Preprocessor took 113.26 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 182.1 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-09-04 16:12:04,497 INFO L168 Benchmark]: RCFGBuilder took 385.80 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 165.4 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:12:04,498 INFO L168 Benchmark]: TraceAbstraction took 1024.49 ms. Allocated memory is still 203.4 MB. Free memory was 164.8 MB in the beginning and 109.8 MB in the end (delta: 54.9 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB. [2020-09-04 16:12:04,503 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 339.89 ms. Allocated memory is still 140.0 MB. Free memory was 104.0 MB in the beginning and 93.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.26 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 182.1 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 385.80 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 165.4 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1024.49 ms. Allocated memory is still 203.4 MB. Free memory was 164.8 MB in the beginning and 109.8 MB in the end (delta: 54.9 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 [L15] COND FALSE !(x < 99) [L47] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 160 SDtfs, 24 SDslu, 53 SDs, 0 SdLazy, 47 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=3, 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, 5 StatesRemovedByMinimization, 2 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...