/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/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:57:31,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:57:31,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:57:31,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:57:31,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:57:31,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:57:31,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:57:31,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:57:31,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:57:31,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:57:31,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:57:31,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-08-22 16:57:31,156 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 [2020-08-22 16:57:31,178 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:57:31,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:57:31,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:57:31,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:57:31,180 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:57:31,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:57:31,181 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:57:31,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:57:31,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:57:31,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:57:31,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:57:31,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:57:31,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:57:31,182 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:57:31,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:57:31,182 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:57:31,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:57:31,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:57:31,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:57:31,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:57:31,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:57:31,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:57:31,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:57:31,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:57:31,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:57:31,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:57:31,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:57:31,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:57:31,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:57:31,185 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:57:31,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:57:31,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:57:31,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:57:31,516 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:57:31,516 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:57:31,517 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-08-22 16:57:31,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/328b5c843/b3d361822f7a4791a3aeda754922a101/FLAG8dafa97c6 [2020-08-22 16:57:32,026 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:57:32,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-08-22 16:57:32,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/328b5c843/b3d361822f7a4791a3aeda754922a101/FLAG8dafa97c6 [2020-08-22 16:57:32,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/328b5c843/b3d361822f7a4791a3aeda754922a101 [2020-08-22 16:57:32,473 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:57:32,474 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:57:32,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:32,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:57:32,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:57:32,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:32" (1/1) ... [2020-08-22 16:57:32,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba01268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:32, skipping insertion in model container [2020-08-22 16:57:32,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:32" (1/1) ... [2020-08-22 16:57:32,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:57:32,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:57:32,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:32,676 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:57:32,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:32,700 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:57:32,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:32 WrapperNode [2020-08-22 16:57:32,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:32,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:57:32,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:57:32,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:57:32,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:32" (1/1) ... [2020-08-22 16:57:32,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:32" (1/1) ... [2020-08-22 16:57:32,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:32" (1/1) ... [2020-08-22 16:57:32,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:32" (1/1) ... [2020-08-22 16:57:32,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:32" (1/1) ... [2020-08-22 16:57:32,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:32" (1/1) ... [2020-08-22 16:57:32,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:32" (1/1) ... [2020-08-22 16:57:32,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:57:32,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:57:32,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:57:32,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:57:32,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:32" (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 [2020-08-22 16:57:32,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:57:32,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:57:32,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:57:32,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:57:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:57:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:57:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:57:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:57:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:57:33,043 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:57:33,043 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 16:57:33,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:33 BoogieIcfgContainer [2020-08-22 16:57:33,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:57:33,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:57:33,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:57:33,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:57:33,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:57:32" (1/3) ... [2020-08-22 16:57:33,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18890b52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:33, skipping insertion in model container [2020-08-22 16:57:33,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:32" (2/3) ... [2020-08-22 16:57:33,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18890b52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:33, skipping insertion in model container [2020-08-22 16:57:33,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:33" (3/3) ... [2020-08-22 16:57:33,056 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-08-22 16:57:33,066 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:57:33,074 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:57:33,087 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:57:33,107 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:57:33,108 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:57:33,108 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:57:33,108 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:57:33,108 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:57:33,108 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:57:33,108 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:57:33,109 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:57:33,126 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-08-22 16:57:33,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 16:57:33,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:33,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:33,134 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:33,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-08-22 16:57:33,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:33,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843563593] [2020-08-22 16:57:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:33,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:33,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843563593] [2020-08-22 16:57:33,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:33,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:57:33,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991842121] [2020-08-22 16:57:33,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:57:33,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:33,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:57:33,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:57:33,417 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-08-22 16:57:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:33,447 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-08-22 16:57:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:57:33,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-22 16:57:33,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:33,458 INFO L225 Difference]: With dead ends: 29 [2020-08-22 16:57:33,458 INFO L226 Difference]: Without dead ends: 12 [2020-08-22 16:57:33,461 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 [2020-08-22 16:57:33,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-08-22 16:57:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-08-22 16:57:33,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-08-22 16:57:33,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-08-22 16:57:33,494 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-08-22 16:57:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:33,495 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-08-22 16:57:33,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:57:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-08-22 16:57:33,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-22 16:57:33,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:33,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:33,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:57:33,497 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:33,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-08-22 16:57:33,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:33,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245238997] [2020-08-22 16:57:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:33,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:33,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245238997] [2020-08-22 16:57:33,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226021066] [2020-08-22 16:57:33,582 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 -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 [2020-08-22 16:57:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:33,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:57:33,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:33,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:33,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-08-22 16:57:33,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477539921] [2020-08-22 16:57:33,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:57:33,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:33,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:57:33,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:33,730 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2020-08-22 16:57:33,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:33,750 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-08-22 16:57:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:57:33,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-22 16:57:33,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:33,752 INFO L225 Difference]: With dead ends: 18 [2020-08-22 16:57:33,752 INFO L226 Difference]: Without dead ends: 13 [2020-08-22 16:57:33,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:33,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-22 16:57:33,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-22 16:57:33,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-22 16:57:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-22 16:57:33,758 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-08-22 16:57:33,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:33,759 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-22 16:57:33,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:57:33,759 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-22 16:57:33,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 16:57:33,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:33,760 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:33,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:57:33,979 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:33,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:33,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-08-22 16:57:33,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:33,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136381030] [2020-08-22 16:57:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:34,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:34,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136381030] [2020-08-22 16:57:34,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727075871] [2020-08-22 16:57:34,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-08-22 16:57:34,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:57:34,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:34,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:57:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:34,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:34,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-08-22 16:57:34,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722602770] [2020-08-22 16:57:34,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:57:34,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:34,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:57:34,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:34,153 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-08-22 16:57:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:34,176 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-08-22 16:57:34,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:57:34,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-08-22 16:57:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:34,178 INFO L225 Difference]: With dead ends: 19 [2020-08-22 16:57:34,178 INFO L226 Difference]: Without dead ends: 14 [2020-08-22 16:57:34,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:34,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-22 16:57:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-22 16:57:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-22 16:57:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-08-22 16:57:34,183 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-08-22 16:57:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:34,184 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-08-22 16:57:34,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:57:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-08-22 16:57:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:57:34,185 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:34,185 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:34,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:34,398 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:34,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:34,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2020-08-22 16:57:34,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:34,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878273131] [2020-08-22 16:57:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:34,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:34,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878273131] [2020-08-22 16:57:34,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827678161] [2020-08-22 16:57:34,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-08-22 16:57:34,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-08-22 16:57:34,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2020-08-22 16:57:34,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:34,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:34,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-08-22 16:57:34,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332276360] [2020-08-22 16:57:34,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:57:34,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:34,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:57:34,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:57:34,633 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2020-08-22 16:57:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:34,683 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-08-22 16:57:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:57:34,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-22 16:57:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:34,686 INFO L225 Difference]: With dead ends: 20 [2020-08-22 16:57:34,686 INFO L226 Difference]: Without dead ends: 15 [2020-08-22 16:57:34,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:57:34,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-22 16:57:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-22 16:57:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-22 16:57:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-22 16:57:34,691 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-08-22 16:57:34,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:34,691 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-22 16:57:34,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:57:34,705 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-22 16:57:34,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 16:57:34,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:34,706 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:34,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:34,920 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:34,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:34,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2020-08-22 16:57:34,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:34,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431489698] [2020-08-22 16:57:34,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:35,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:35,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431489698] [2020-08-22 16:57:35,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400048656] [2020-08-22 16:57:35,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-08-22 16:57:35,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:57:35,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:35,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2020-08-22 16:57:35,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:35,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:35,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-08-22 16:57:35,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636547635] [2020-08-22 16:57:35,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:57:35,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:35,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:57:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:57:35,148 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-08-22 16:57:35,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:35,189 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-08-22 16:57:35,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:57:35,189 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-08-22 16:57:35,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:35,190 INFO L225 Difference]: With dead ends: 21 [2020-08-22 16:57:35,190 INFO L226 Difference]: Without dead ends: 16 [2020-08-22 16:57:35,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:57:35,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-22 16:57:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-22 16:57:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-22 16:57:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-08-22 16:57:35,195 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-08-22 16:57:35,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:35,196 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-08-22 16:57:35,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:57:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-08-22 16:57:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 16:57:35,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:35,197 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:35,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:35,411 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:35,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:35,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2020-08-22 16:57:35,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:35,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136239731] [2020-08-22 16:57:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:35,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:35,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136239731] [2020-08-22 16:57:35,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453810908] [2020-08-22 16:57:35,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:35,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-08-22 16:57:35,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:35,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2020-08-22 16:57:35,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:35,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:35,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-08-22 16:57:35,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298201371] [2020-08-22 16:57:35,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:57:35,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:35,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:57:35,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:57:35,673 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-08-22 16:57:35,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:35,742 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-08-22 16:57:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:57:35,744 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-08-22 16:57:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:35,745 INFO L225 Difference]: With dead ends: 22 [2020-08-22 16:57:35,745 INFO L226 Difference]: Without dead ends: 17 [2020-08-22 16:57:35,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:57:35,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-22 16:57:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-22 16:57:35,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-22 16:57:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-22 16:57:35,756 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-08-22 16:57:35,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:35,757 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-22 16:57:35,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:57:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-22 16:57:35,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 16:57:35,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:35,759 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:35,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-08-22 16:57:35,972 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:35,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2020-08-22 16:57:35,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:35,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316143430] [2020-08-22 16:57:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:57:36,006 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:57:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:57:36,035 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:57:36,058 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:57:36,059 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:57:36,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 16:57:36,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:57:36 BoogieIcfgContainer [2020-08-22 16:57:36,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:57:36,099 INFO L168 Benchmark]: Toolchain (without parser) took 3616.99 ms. Allocated memory was 140.5 MB in the beginning and 234.4 MB in the end (delta: 93.8 MB). Free memory was 102.1 MB in the beginning and 147.3 MB in the end (delta: -45.1 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:36,100 INFO L168 Benchmark]: CDTParser took 1.41 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:57:36,102 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.81 ms. Allocated memory is still 140.5 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:36,103 INFO L168 Benchmark]: Boogie Preprocessor took 107.37 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 181.9 MB in the end (delta: -89.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:36,104 INFO L168 Benchmark]: RCFGBuilder took 238.54 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 170.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:36,107 INFO L168 Benchmark]: TraceAbstraction took 3040.67 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 170.3 MB in the beginning and 147.3 MB in the end (delta: 23.0 MB). Peak memory consumption was 53.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:36,118 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.41 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 225.81 ms. Allocated memory is still 140.5 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.37 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 181.9 MB in the end (delta: -89.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 238.54 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 170.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3040.67 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 170.3 MB in the beginning and 147.3 MB in the end (delta: 23.0 MB). Peak memory consumption was 53.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; VAL [x=0, y=1] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=1, y=2] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=2, y=4] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=3, y=8] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=4, y=16] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=5, y=32] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=6, y=64] [L14] COND FALSE !(x < 6) VAL [x=6, y=64] [L19] CALL __VERIFIER_assert(y != 64) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.9s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 0 SDslu, 190 SDs, 0 SdLazy, 137 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 4835 SizeOfPredicates, 5 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 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 incorrect! Received shutdown request...