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/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:17:23,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:17:23,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:17:23,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:17:23,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:17:23,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:17:23,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:17:23,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:17:23,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:17:23,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:17:23,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:17:23,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:17:23,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:17:23,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:17:23,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:17:23,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:17:23,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:17:23,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:17:23,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:17:23,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:17:23,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:17:23,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:17:23,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:17:23,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:17:23,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:17:23,667 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:17:23,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:17:23,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:17:23,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:17:23,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:17:23,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:17:23,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:17:23,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:17:23,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:17:23,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:17:23,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:17:23,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:17:23,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:17:23,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:17:23,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:17:23,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:17:23,679 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 [2019-10-13 19:17:23,692 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:17:23,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:17:23,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:17:23,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:17:23,694 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:17:23,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:17:23,695 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:17:23,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:17:23,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:17:23,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:17:23,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:17:23,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:17:23,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:17:23,696 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:17:23,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:17:23,697 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:17:23,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:17:23,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:17:23,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:17:23,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:17:23,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:17:23,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:17:23,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:17:23,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:17:23,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:17:23,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:17:23,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:17:23,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:17:23,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:17:23,985 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:17:24,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:17:24,008 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:17:24,010 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:17:24,010 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:17:24,011 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2019-10-13 19:17:24,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d14f62109/37f27242923e451cbbfc8417876a8937/FLAG520a1b6e4 [2019-10-13 19:17:24,554 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:17:24,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c [2019-10-13 19:17:24,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d14f62109/37f27242923e451cbbfc8417876a8937/FLAG520a1b6e4 [2019-10-13 19:17:24,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d14f62109/37f27242923e451cbbfc8417876a8937 [2019-10-13 19:17:24,964 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:17:24,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:17:24,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:17:24,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:17:24,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:17:24,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:24" (1/1) ... [2019-10-13 19:17:24,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73961d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:24, skipping insertion in model container [2019-10-13 19:17:24,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:24" (1/1) ... [2019-10-13 19:17:24,981 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:17:24,997 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:17:25,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:17:25,191 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:17:25,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:17:25,232 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:17:25,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25 WrapperNode [2019-10-13 19:17:25,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:17:25,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:17:25,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:17:25,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:17:25,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (1/1) ... [2019-10-13 19:17:25,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:17:25,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:17:25,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:17:25,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:17:25,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (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 [2019-10-13 19:17:25,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:17:25,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:17:25,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:17:25,426 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2019-10-13 19:17:25,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:17:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:17:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 19:17:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:17:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-13 19:17:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2019-10-13 19:17:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:17:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:17:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 19:17:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:17:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:17:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:17:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:17:25,689 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:17:25,690 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 19:17:25,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:25 BoogieIcfgContainer [2019-10-13 19:17:25,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:17:25,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:17:25,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:17:25,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:17:25,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:17:24" (1/3) ... [2019-10-13 19:17:25,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e40e614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:25, skipping insertion in model container [2019-10-13 19:17:25,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:25" (2/3) ... [2019-10-13 19:17:25,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e40e614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:25, skipping insertion in model container [2019-10-13 19:17:25,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:25" (3/3) ... [2019-10-13 19:17:25,713 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2019-10-13 19:17:25,723 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:17:25,741 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:17:25,750 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:17:25,773 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:17:25,774 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:17:25,774 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:17:25,774 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:17:25,774 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:17:25,774 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:17:25,774 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:17:25,775 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:17:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-13 19:17:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 19:17:25,796 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:25,797 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:25,799 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:25,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1860043698, now seen corresponding path program 1 times [2019-10-13 19:17:25,813 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:25,814 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623346508] [2019-10-13 19:17:25,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:25,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:25,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:26,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623346508] [2019-10-13 19:17:26,047 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:17:26,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:17:26,048 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623773792] [2019-10-13 19:17:26,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:17:26,053 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:26,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:17:26,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:17:26,075 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-13 19:17:26,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:26,153 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-10-13 19:17:26,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:17:26,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-13 19:17:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:26,164 INFO L225 Difference]: With dead ends: 44 [2019-10-13 19:17:26,164 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 19:17:26,167 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:17:26,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 19:17:26,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-13 19:17:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 19:17:26,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-13 19:17:26,206 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2019-10-13 19:17:26,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:26,206 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-13 19:17:26,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:17:26,207 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-13 19:17:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:17:26,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:26,208 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:26,209 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:26,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash 916881159, now seen corresponding path program 1 times [2019-10-13 19:17:26,210 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:26,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603818166] [2019-10-13 19:17:26,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:26,211 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:26,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:26,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603818166] [2019-10-13 19:17:26,469 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:17:26,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 19:17:26,469 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451723250] [2019-10-13 19:17:26,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:17:26,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:26,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:17:26,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:17:26,473 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-10-13 19:17:26,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:26,662 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-10-13 19:17:26,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:17:26,663 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-13 19:17:26,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:26,664 INFO L225 Difference]: With dead ends: 29 [2019-10-13 19:17:26,665 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 19:17:26,666 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:17:26,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 19:17:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-13 19:17:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 19:17:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-13 19:17:26,673 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2019-10-13 19:17:26,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:26,673 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-13 19:17:26,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:17:26,674 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-13 19:17:26,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:17:26,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:26,675 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:26,675 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:26,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1635275802, now seen corresponding path program 1 times [2019-10-13 19:17:26,676 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:26,676 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647019989] [2019-10-13 19:17:26,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:26,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:26,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:26,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647019989] [2019-10-13 19:17:26,958 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:17:26,959 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 19:17:26,959 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858279521] [2019-10-13 19:17:26,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:17:26,960 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:26,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:17:26,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:17:26,960 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2019-10-13 19:17:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:27,140 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-10-13 19:17:27,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:17:27,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-13 19:17:27,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:27,142 INFO L225 Difference]: With dead ends: 33 [2019-10-13 19:17:27,142 INFO L226 Difference]: Without dead ends: 24 [2019-10-13 19:17:27,144 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:17:27,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-13 19:17:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-13 19:17:27,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 19:17:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-13 19:17:27,156 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2019-10-13 19:17:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:27,157 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-13 19:17:27,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:17:27,158 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-13 19:17:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 19:17:27,158 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:27,159 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:27,159 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:27,160 INFO L82 PathProgramCache]: Analyzing trace with hash 636491705, now seen corresponding path program 1 times [2019-10-13 19:17:27,161 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:27,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400843808] [2019-10-13 19:17:27,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:27,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:27,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:27,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400843808] [2019-10-13 19:17:27,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599844716] [2019-10-13 19:17:27,471 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 [2019-10-13 19:17:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:27,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 19:17:27,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:27,692 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:27,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2019-10-13 19:17:27,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950210504] [2019-10-13 19:17:27,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:17:27,693 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:17:27,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:17:27,694 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2019-10-13 19:17:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:27,922 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-10-13 19:17:27,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:17:27,923 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-10-13 19:17:27,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:27,924 INFO L225 Difference]: With dead ends: 36 [2019-10-13 19:17:27,925 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 19:17:27,925 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:17:27,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 19:17:27,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-13 19:17:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 19:17:27,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-13 19:17:27,934 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2019-10-13 19:17:27,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:27,934 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-13 19:17:27,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:17:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-13 19:17:27,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 19:17:27,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:27,936 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:28,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:28,139 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:28,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:28,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1232357626, now seen corresponding path program 2 times [2019-10-13 19:17:28,140 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:28,141 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17282683] [2019-10-13 19:17:28,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:28,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:28,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 19:17:28,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17282683] [2019-10-13 19:17:28,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872067842] [2019-10-13 19:17:28,444 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 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 [2019-10-13 19:17:28,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 19:17:28,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:28,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 19:17:28,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 19:17:28,628 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:28,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2019-10-13 19:17:28,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394828779] [2019-10-13 19:17:28,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:17:28,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:28,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:17:28,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:17:28,631 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 11 states. [2019-10-13 19:17:28,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:28,931 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-10-13 19:17:28,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:17:28,931 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-10-13 19:17:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:28,934 INFO L225 Difference]: With dead ends: 39 [2019-10-13 19:17:28,934 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 19:17:28,935 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:17:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 19:17:28,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-10-13 19:17:28,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 19:17:28,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-13 19:17:28,941 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 26 [2019-10-13 19:17:28,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:28,941 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-13 19:17:28,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:17:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-13 19:17:28,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 19:17:28,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:28,943 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:29,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:29,147 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:29,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1625384636, now seen corresponding path program 1 times [2019-10-13 19:17:29,148 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:29,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981872876] [2019-10-13 19:17:29,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:29,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:29,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:31,464 WARN L191 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 163 DAG size of output: 31 [2019-10-13 19:17:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:32,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981872876] [2019-10-13 19:17:32,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601787295] [2019-10-13 19:17:32,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 19:17:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:32,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-13 19:17:32,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:32,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:39,991 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 30 DAG size of output: 13 [2019-10-13 19:17:40,068 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 59 treesize of output 55 [2019-10-13 19:17:40,069 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:17:40,078 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 19:17:40,079 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 1 [2019-10-13 19:17:40,080 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:17:40,147 INFO L567 ElimStorePlain]: treesize reduction 280, result has 11.1 percent of original size [2019-10-13 19:17:40,148 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-10-13 19:17:40,148 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-10-13 19:17:40,148 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-10-13 19:17:40,149 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. [2019-10-13 19:17:40,149 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:377, output treesize:35 [2019-10-13 19:17:41,807 WARN L191 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 46 [2019-10-13 19:17:45,128 WARN L191 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2019-10-13 19:17:48,056 WARN L191 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2019-10-13 19:17:48,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:48,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:48,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:48,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:48,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:48,833 WARN L191 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-10-13 19:17:48,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:51,473 WARN L191 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2019-10-13 19:17:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:51,613 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:51,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2019-10-13 19:17:51,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369133618] [2019-10-13 19:17:51,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 19:17:51,615 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:51,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 19:17:51,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=563, Unknown=1, NotChecked=0, Total=650 [2019-10-13 19:17:51,616 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 26 states. [2019-10-13 19:17:53,958 WARN L191 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-10-13 19:17:55,915 WARN L191 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2019-10-13 19:17:58,499 WARN L191 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2019-10-13 19:17:59,519 WARN L191 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-13 19:17:59,836 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-13 19:18:01,967 WARN L191 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 60 [2019-10-13 19:18:03,503 WARN L191 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2019-10-13 19:18:05,347 WARN L191 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-10-13 19:18:06,310 WARN L191 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2019-10-13 19:18:09,470 WARN L191 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-13 19:18:10,171 WARN L191 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2019-10-13 19:18:10,535 WARN L191 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2019-10-13 19:18:10,699 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2019-10-13 19:18:11,605 WARN L191 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2019-10-13 19:18:12,710 WARN L191 SmtUtils]: Spent 997.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2019-10-13 19:18:13,008 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2019-10-13 19:18:13,460 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2019-10-13 19:18:13,777 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2019-10-13 19:18:14,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:14,080 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2019-10-13 19:18:14,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 19:18:14,080 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2019-10-13 19:18:14,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:14,081 INFO L225 Difference]: With dead ends: 54 [2019-10-13 19:18:14,081 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 19:18:14,083 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=368, Invalid=1793, Unknown=1, NotChecked=0, Total=2162 [2019-10-13 19:18:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 19:18:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2019-10-13 19:18:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-13 19:18:14,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-10-13 19:18:14,089 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 26 [2019-10-13 19:18:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:14,090 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-10-13 19:18:14,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 19:18:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-10-13 19:18:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 19:18:14,091 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:14,091 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:14,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:14,302 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:14,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:14,303 INFO L82 PathProgramCache]: Analyzing trace with hash -854746409, now seen corresponding path program 2 times [2019-10-13 19:18:14,304 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:14,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362014483] [2019-10-13 19:18:14,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:14,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:14,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat