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-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:14:24,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:14:24,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:14:24,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:14:24,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:14:24,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:14:24,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:14:24,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:14:24,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:14:24,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:14:24,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:14:24,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:14:24,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:14:24,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:14:24,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:14:24,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:14:24,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:14:24,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:14:24,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:14:24,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:14:24,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:14:24,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:14:24,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:14:24,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:14:24,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:14:24,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:14:24,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:14:24,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:14:24,216 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 [2019-10-14 23:14:24,230 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:14:24,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:14:24,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:14:24,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:14:24,232 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:14:24,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:14:24,233 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:14:24,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:14:24,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:14:24,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:14:24,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:14:24,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:14:24,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:14:24,234 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:14:24,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:14:24,234 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:14:24,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:14:24,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:14:24,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:14:24,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:14:24,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:14:24,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:14:24,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:14:24,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:14:24,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:14:24,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:14:24,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:14:24,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:14:24,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:14:24,534 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:14:24,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:14:24,561 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:14:24,562 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:14:24,562 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:14:24,564 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2019-10-14 23:14:24,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dcf36828/5f9da965dd1049daaa81f8de79770300/FLAGdf76e8b86 [2019-10-14 23:14:25,124 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:14:25,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2019-10-14 23:14:25,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dcf36828/5f9da965dd1049daaa81f8de79770300/FLAGdf76e8b86 [2019-10-14 23:14:25,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dcf36828/5f9da965dd1049daaa81f8de79770300 [2019-10-14 23:14:25,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:14:25,509 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:14:25,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:14:25,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:14:25,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:14:25,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:14:25" (1/1) ... [2019-10-14 23:14:25,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653cba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:25, skipping insertion in model container [2019-10-14 23:14:25,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:14:25" (1/1) ... [2019-10-14 23:14:25,528 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:14:25,545 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:14:25,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:14:25,787 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:14:25,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:14:25,830 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:14:25,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:25 WrapperNode [2019-10-14 23:14:25,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:14:25,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:14:25,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:14:25,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:14:25,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:25" (1/1) ... [2019-10-14 23:14:25,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:25" (1/1) ... [2019-10-14 23:14:25,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:25" (1/1) ... [2019-10-14 23:14:25,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:25" (1/1) ... [2019-10-14 23:14:25,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:25" (1/1) ... [2019-10-14 23:14:25,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:25" (1/1) ... [2019-10-14 23:14:25,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:25" (1/1) ... [2019-10-14 23:14:25,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:14:25,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:14:25,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:14:25,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:14:25,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:25" (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 [2019-10-14 23:14:26,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:14:26,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:14:26,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:14:26,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:14:26,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:14:26,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:14:26,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:14:26,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:14:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:14:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:14:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:14:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:14:26,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:14:28,309 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:14:28,310 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 23:14:28,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:28 BoogieIcfgContainer [2019-10-14 23:14:28,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:14:28,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:14:28,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:14:28,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:14:28,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:14:25" (1/3) ... [2019-10-14 23:14:28,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbb13c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:28, skipping insertion in model container [2019-10-14 23:14:28,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:25" (2/3) ... [2019-10-14 23:14:28,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbb13c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:28, skipping insertion in model container [2019-10-14 23:14:28,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:28" (3/3) ... [2019-10-14 23:14:28,341 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2019-10-14 23:14:28,355 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:14:28,368 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:14:28,381 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:14:28,402 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:14:28,402 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:14:28,402 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:14:28,403 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:14:28,403 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:14:28,403 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:14:28,403 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:14:28,403 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:14:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-14 23:14:28,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:14:28,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:28,424 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:28,426 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:28,431 INFO L82 PathProgramCache]: Analyzing trace with hash -956066777, now seen corresponding path program 1 times [2019-10-14 23:14:28,438 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:28,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742980791] [2019-10-14 23:14:28,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:28,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:28,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:28,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742980791] [2019-10-14 23:14:28,611 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:28,612 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:14:28,612 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244162282] [2019-10-14 23:14:28,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:14:28,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:28,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:14:28,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:14:28,634 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-10-14 23:14:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:30,776 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2019-10-14 23:14:30,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:14:30,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-14 23:14:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:30,790 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:14:30,790 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:14:30,793 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:14:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:14:30,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 23:14:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 23:14:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-14 23:14:30,830 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2019-10-14 23:14:30,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:30,830 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-14 23:14:30,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:14:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-14 23:14:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:14:30,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:30,833 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:30,833 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:30,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:30,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1471973101, now seen corresponding path program 1 times [2019-10-14 23:14:30,834 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:30,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199575049] [2019-10-14 23:14:30,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:30,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:30,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:30,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199575049] [2019-10-14 23:14:30,966 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:30,966 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:14:30,967 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943781392] [2019-10-14 23:14:30,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:14:30,968 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:30,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:14:30,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:14:30,969 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2019-10-14 23:14:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:31,086 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-14 23:14:31,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:14:31,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-14 23:14:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:31,088 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:14:31,088 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:14:31,090 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:14:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:14:31,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2019-10-14 23:14:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 23:14:31,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-14 23:14:31,099 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2019-10-14 23:14:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:31,099 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-14 23:14:31,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:14:31,100 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-14 23:14:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:14:31,101 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:31,101 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:31,101 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:31,102 INFO L82 PathProgramCache]: Analyzing trace with hash 534952077, now seen corresponding path program 1 times [2019-10-14 23:14:31,102 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:31,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275509938] [2019-10-14 23:14:31,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:31,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:31,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:31,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275509938] [2019-10-14 23:14:31,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427935348] [2019-10-14 23:14:31,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:31,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:14:31,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:31,405 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 23:14:31,406 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:14:31,410 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:14:31,411 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:14:31,411 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-10-14 23:14:31,465 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 23:14:31,466 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:14:31,471 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:14:31,471 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:14:31,472 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-10-14 23:14:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:31,515 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:31,516 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 10 [2019-10-14 23:14:31,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531074853] [2019-10-14 23:14:31,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:14:31,517 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:31,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:14:31,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:14:31,518 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 10 states. [2019-10-14 23:14:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:31,776 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2019-10-14 23:14:31,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:14:31,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-10-14 23:14:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:31,778 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:14:31,778 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:14:31,779 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:14:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:14:31,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2019-10-14 23:14:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 23:14:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-14 23:14:31,788 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2019-10-14 23:14:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:31,788 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-14 23:14:31,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:14:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-14 23:14:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 23:14:31,790 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:31,790 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:32,003 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:32,003 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:32,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:32,003 INFO L82 PathProgramCache]: Analyzing trace with hash 909633835, now seen corresponding path program 1 times [2019-10-14 23:14:32,004 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:32,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011548602] [2019-10-14 23:14:32,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:32,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:32,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:14:32,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011548602] [2019-10-14 23:14:32,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389211711] [2019-10-14 23:14:32,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:32,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 23:14:32,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:32,252 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 23:14:32,253 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:14:32,307 INFO L567 ElimStorePlain]: treesize reduction 196, result has 11.7 percent of original size [2019-10-14 23:14:32,311 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2019-10-14 23:14:32,311 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:14:32,321 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:14:32,321 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-10-14 23:14:32,321 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_8| vanished before elimination [2019-10-14 23:14:32,322 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:14:32,323 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:271, output treesize:22 [2019-10-14 23:14:32,602 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:14:32,603 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2019-10-14 23:14:32,604 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-14 23:14:32,626 INFO L567 ElimStorePlain]: treesize reduction 13, result has 48.0 percent of original size [2019-10-14 23:14:32,627 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:14:32,629 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:31, output treesize:12 [2019-10-14 23:14:32,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:14:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:32,710 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:32,710 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 15 [2019-10-14 23:14:32,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365597248] [2019-10-14 23:14:32,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:14:32,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:32,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:14:32,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:14:32,715 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 15 states. [2019-10-14 23:14:35,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:35,755 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2019-10-14 23:14:35,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:14:35,756 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2019-10-14 23:14:35,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:35,758 INFO L225 Difference]: With dead ends: 110 [2019-10-14 23:14:35,758 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 23:14:35,759 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:14:35,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 23:14:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 61. [2019-10-14 23:14:35,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 23:14:35,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2019-10-14 23:14:35,772 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 27 [2019-10-14 23:14:35,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:35,773 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2019-10-14 23:14:35,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:14:35,773 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2019-10-14 23:14:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:14:35,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:35,774 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:35,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:35,978 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash -180676761, now seen corresponding path program 2 times [2019-10-14 23:14:35,979 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:35,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156912837] [2019-10-14 23:14:35,980 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:35,980 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:35,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:14:36,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156912837] [2019-10-14 23:14:36,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937375854] [2019-10-14 23:14:36,156 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:36,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:36,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:36,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:14:36,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:14:36,226 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:36,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 23:14:36,227 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532134214] [2019-10-14 23:14:36,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:14:36,228 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:36,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:14:36,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:14:36,229 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 9 states. [2019-10-14 23:14:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:36,478 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2019-10-14 23:14:36,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:14:36,478 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-10-14 23:14:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:36,480 INFO L225 Difference]: With dead ends: 107 [2019-10-14 23:14:36,480 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 23:14:36,481 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:14:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 23:14:36,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2019-10-14 23:14:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:14:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2019-10-14 23:14:36,492 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 31 [2019-10-14 23:14:36,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:36,492 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2019-10-14 23:14:36,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:14:36,492 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2019-10-14 23:14:36,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 23:14:36,493 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:36,494 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:36,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:36,697 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:36,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:36,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1198313659, now seen corresponding path program 3 times [2019-10-14 23:14:36,698 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:36,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011570932] [2019-10-14 23:14:36,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:36,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:36,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:14:36,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011570932] [2019-10-14 23:14:36,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017549954] [2019-10-14 23:14:36,888 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:36,992 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 23:14:36,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:36,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:14:36,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:14:37,034 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:37,034 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 23:14:37,035 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239986893] [2019-10-14 23:14:37,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:14:37,035 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:37,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:14:37,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:14:37,036 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 10 states. [2019-10-14 23:14:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:37,326 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2019-10-14 23:14:37,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:14:37,327 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-10-14 23:14:37,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:37,328 INFO L225 Difference]: With dead ends: 108 [2019-10-14 23:14:37,328 INFO L226 Difference]: Without dead ends: 68 [2019-10-14 23:14:37,329 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:14:37,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-14 23:14:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2019-10-14 23:14:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 23:14:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2019-10-14 23:14:37,341 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 33 [2019-10-14 23:14:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:37,341 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2019-10-14 23:14:37,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:14:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2019-10-14 23:14:37,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:14:37,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:37,343 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:37,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:37,556 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:37,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:37,556 INFO L82 PathProgramCache]: Analyzing trace with hash 105170851, now seen corresponding path program 4 times [2019-10-14 23:14:37,557 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:37,557 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297667445] [2019-10-14 23:14:37,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:37,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:37,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:14:37,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297667445] [2019-10-14 23:14:37,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946989627] [2019-10-14 23:14:37,735 INFO L92 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 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 [2019-10-14 23:14:37,778 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:37,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:37,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:14:37,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:14:37,822 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:37,823 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 23:14:37,823 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222059482] [2019-10-14 23:14:37,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:14:37,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:37,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:14:37,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:14:37,824 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 11 states. [2019-10-14 23:14:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:38,184 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2019-10-14 23:14:38,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:14:38,186 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-10-14 23:14:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:38,186 INFO L225 Difference]: With dead ends: 120 [2019-10-14 23:14:38,187 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 23:14:38,188 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:14:38,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 23:14:38,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2019-10-14 23:14:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 23:14:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2019-10-14 23:14:38,200 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 35 [2019-10-14 23:14:38,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:38,201 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2019-10-14 23:14:38,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:14:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2019-10-14 23:14:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:14:38,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:38,202 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:38,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:38,414 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:38,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1376665471, now seen corresponding path program 5 times [2019-10-14 23:14:38,414 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:38,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315299930] [2019-10-14 23:14:38,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:38,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:38,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:14:38,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315299930] [2019-10-14 23:14:38,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928792839] [2019-10-14 23:14:38,633 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:40,255 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-10-14 23:14:40,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:40,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:14:40,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:14:40,294 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:40,294 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:14:40,294 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601372858] [2019-10-14 23:14:40,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:14:40,295 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:40,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:14:40,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:14:40,295 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 12 states. [2019-10-14 23:14:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:40,712 INFO L93 Difference]: Finished difference Result 132 states and 151 transitions. [2019-10-14 23:14:40,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:14:40,713 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-10-14 23:14:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:40,715 INFO L225 Difference]: With dead ends: 132 [2019-10-14 23:14:40,717 INFO L226 Difference]: Without dead ends: 82 [2019-10-14 23:14:40,717 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:14:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-14 23:14:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2019-10-14 23:14:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 23:14:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2019-10-14 23:14:40,736 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 37 [2019-10-14 23:14:40,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:40,736 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2019-10-14 23:14:40,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:14:40,737 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2019-10-14 23:14:40,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:14:40,738 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:40,740 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:40,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:40,941 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:40,942 INFO L82 PathProgramCache]: Analyzing trace with hash 507771359, now seen corresponding path program 6 times [2019-10-14 23:14:40,942 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:40,942 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380457060] [2019-10-14 23:14:40,943 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:40,943 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:40,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:14:41,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380457060] [2019-10-14 23:14:41,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865606834] [2019-10-14 23:14:41,165 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:42,334 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 23:14:42,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:42,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:14:42,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:14:42,384 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:42,385 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:14:42,385 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52965765] [2019-10-14 23:14:42,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:14:42,386 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:42,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:14:42,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:14:42,387 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 13 states. [2019-10-14 23:14:42,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:42,891 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2019-10-14 23:14:42,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:14:42,892 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-10-14 23:14:42,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:42,893 INFO L225 Difference]: With dead ends: 144 [2019-10-14 23:14:42,894 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 23:14:42,894 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:14:42,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 23:14:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2019-10-14 23:14:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-14 23:14:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2019-10-14 23:14:42,907 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 39 [2019-10-14 23:14:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:42,908 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2019-10-14 23:14:42,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:14:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2019-10-14 23:14:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 23:14:42,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:42,909 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:43,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:43,119 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:43,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1024633923, now seen corresponding path program 7 times [2019-10-14 23:14:43,120 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:43,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316966980] [2019-10-14 23:14:43,121 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:43,121 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:43,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:14:43,321 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316966980] [2019-10-14 23:14:43,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172322903] [2019-10-14 23:14:43,322 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:43,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:14:43,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:14:43,397 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:43,397 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 23:14:43,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359962389] [2019-10-14 23:14:43,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:14:43,398 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:43,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:14:43,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:14:43,398 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 14 states. [2019-10-14 23:14:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:43,998 INFO L93 Difference]: Finished difference Result 156 states and 179 transitions. [2019-10-14 23:14:43,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:14:43,999 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2019-10-14 23:14:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:44,000 INFO L225 Difference]: With dead ends: 156 [2019-10-14 23:14:44,000 INFO L226 Difference]: Without dead ends: 96 [2019-10-14 23:14:44,000 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:14:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-14 23:14:44,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2019-10-14 23:14:44,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-14 23:14:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2019-10-14 23:14:44,014 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 41 [2019-10-14 23:14:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:44,014 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2019-10-14 23:14:44,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:14:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2019-10-14 23:14:44,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 23:14:44,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:44,017 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:44,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:44,218 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:44,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:44,219 INFO L82 PathProgramCache]: Analyzing trace with hash -492327397, now seen corresponding path program 8 times [2019-10-14 23:14:44,219 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:44,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172219172] [2019-10-14 23:14:44,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:44,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:44,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:14:44,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172219172] [2019-10-14 23:14:44,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913230698] [2019-10-14 23:14:44,417 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:44,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:44,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:44,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:14:44,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:14:44,559 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:44,560 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 23:14:44,560 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927740270] [2019-10-14 23:14:44,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:14:44,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:44,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:14:44,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:14:44,562 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 15 states. [2019-10-14 23:14:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:45,282 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2019-10-14 23:14:45,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:14:45,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2019-10-14 23:14:45,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:45,284 INFO L225 Difference]: With dead ends: 168 [2019-10-14 23:14:45,284 INFO L226 Difference]: Without dead ends: 103 [2019-10-14 23:14:45,285 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:14:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-14 23:14:45,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2019-10-14 23:14:45,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 23:14:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2019-10-14 23:14:45,296 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 43 [2019-10-14 23:14:45,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:45,296 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2019-10-14 23:14:45,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:14:45,297 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2019-10-14 23:14:45,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:14:45,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:45,298 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:45,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:45,508 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:45,509 INFO L82 PathProgramCache]: Analyzing trace with hash -46864135, now seen corresponding path program 9 times [2019-10-14 23:14:45,509 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:45,509 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068738377] [2019-10-14 23:14:45,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:45,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:45,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:14:45,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068738377] [2019-10-14 23:14:45,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926896688] [2019-10-14 23:14:45,728 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true