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/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:45,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:45,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:45,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:45,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:45,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:45,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:45,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:45,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:45,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:45,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:45,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:45,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:45,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:45,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:45,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:45,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:45,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:45,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:45,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:45,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:45,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:45,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:45,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:45,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:16:45,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:16:45,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:16:45,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:16:45,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:16:45,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:16:45,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:45,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:45,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:45,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:45,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:45,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:45,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:45,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:45,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:45,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:45,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:45,622 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 23:16:45,637 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:45,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:45,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:45,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:45,639 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:45,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:45,639 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:45,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:45,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:45,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:45,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:45,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:45,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:45,640 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:45,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:45,641 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:45,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:45,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:45,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:45,642 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:45,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:45,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:45,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:45,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:45,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:45,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:45,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:45,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:45,644 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:45,919 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:45,940 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:45,945 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:45,948 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:45,948 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:45,949 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2019-10-14 23:16:46,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd6c1de0/3d6cfc78616e414482bb33c8743b68ad/FLAG7b418d890 [2019-10-14 23:16:46,462 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:46,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2019-10-14 23:16:46,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd6c1de0/3d6cfc78616e414482bb33c8743b68ad/FLAG7b418d890 [2019-10-14 23:16:46,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd6c1de0/3d6cfc78616e414482bb33c8743b68ad [2019-10-14 23:16:46,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:46,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:46,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:46,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:46,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:46,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:46" (1/1) ... [2019-10-14 23:16:46,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c6ea3f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:46, skipping insertion in model container [2019-10-14 23:16:46,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:46" (1/1) ... [2019-10-14 23:16:46,907 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:46,926 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:47,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:47,105 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:47,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:47,130 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:47,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:47 WrapperNode [2019-10-14 23:16:47,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:47,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:47,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:47,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:47,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:47" (1/1) ... [2019-10-14 23:16:47,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:47" (1/1) ... [2019-10-14 23:16:47,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:47" (1/1) ... [2019-10-14 23:16:47,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:47" (1/1) ... [2019-10-14 23:16:47,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:47" (1/1) ... [2019-10-14 23:16:47,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:47" (1/1) ... [2019-10-14 23:16:47,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:47" (1/1) ... [2019-10-14 23:16:47,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:47,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:47,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:47,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:47,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:47" (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 23:16:47,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:47,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:47,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:47,299 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:47,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-14 23:16:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:47,481 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:47,482 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:16:47,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:47 BoogieIcfgContainer [2019-10-14 23:16:47,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:47,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:47,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:47,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:47,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:46" (1/3) ... [2019-10-14 23:16:47,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b88f0c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:47, skipping insertion in model container [2019-10-14 23:16:47,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:47" (2/3) ... [2019-10-14 23:16:47,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b88f0c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:47, skipping insertion in model container [2019-10-14 23:16:47,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:47" (3/3) ... [2019-10-14 23:16:47,492 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2019-10-14 23:16:47,502 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:47,510 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:47,529 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:47,579 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:47,580 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:47,580 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:47,580 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:47,580 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:47,581 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:47,581 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:47,581 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:47,600 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-14 23:16:47,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:16:47,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:47,608 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:47,610 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:47,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:47,617 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2019-10-14 23:16:47,625 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:47,626 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284134883] [2019-10-14 23:16:47,626 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:47,626 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:47,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:47,735 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 23:16:47,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284134883] [2019-10-14 23:16:47,736 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:47,737 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:16:47,737 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133778904] [2019-10-14 23:16:47,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:16:47,742 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:47,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:16:47,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:16:47,756 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-14 23:16:47,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:47,779 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-10-14 23:16:47,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:16:47,780 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:16:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:47,788 INFO L225 Difference]: With dead ends: 31 [2019-10-14 23:16:47,789 INFO L226 Difference]: Without dead ends: 14 [2019-10-14 23:16:47,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:16:47,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-14 23:16:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-14 23:16:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-14 23:16:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-14 23:16:47,830 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-10-14 23:16:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:47,830 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-14 23:16:47,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:16:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-14 23:16:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:16:47,832 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:47,832 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:47,832 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:47,833 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2019-10-14 23:16:47,833 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:47,833 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173629729] [2019-10-14 23:16:47,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:47,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:47,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:47,938 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 23:16:47,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173629729] [2019-10-14 23:16:47,939 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:47,939 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:16:47,939 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560187207] [2019-10-14 23:16:47,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:47,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:47,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:47,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:47,943 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-10-14 23:16:48,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:48,010 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-10-14 23:16:48,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:48,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:16:48,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:48,012 INFO L225 Difference]: With dead ends: 23 [2019-10-14 23:16:48,012 INFO L226 Difference]: Without dead ends: 18 [2019-10-14 23:16:48,013 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:48,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-14 23:16:48,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-14 23:16:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-14 23:16:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-14 23:16:48,018 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2019-10-14 23:16:48,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:48,019 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-14 23:16:48,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-14 23:16:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:16:48,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:48,020 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:48,021 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:48,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:48,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2019-10-14 23:16:48,022 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:48,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831479114] [2019-10-14 23:16:48,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:48,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:48,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:48,267 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 23:16:48,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831479114] [2019-10-14 23:16:48,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632346659] [2019-10-14 23:16:48,268 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 23:16:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:48,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:16:48,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:48,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:48,530 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 23:16:48,535 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:48,535 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-10-14 23:16:48,535 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173205651] [2019-10-14 23:16:48,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:16:48,536 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:48,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:16:48,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:16:48,539 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 16 states. [2019-10-14 23:16:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:48,778 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-10-14 23:16:48,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:16:48,778 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2019-10-14 23:16:48,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:48,781 INFO L225 Difference]: With dead ends: 40 [2019-10-14 23:16:48,782 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:16:48,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:16:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:16:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2019-10-14 23:16:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:16:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 23:16:48,790 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2019-10-14 23:16:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:48,791 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 23:16:48,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:16:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 23:16:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:16:48,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:48,792 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:48,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:48,997 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:48,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:48,998 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2019-10-14 23:16:48,998 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:48,999 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221789148] [2019-10-14 23:16:48,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:48,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:48,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:16:49,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221789148] [2019-10-14 23:16:49,048 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:49,048 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:16:49,049 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389280137] [2019-10-14 23:16:49,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:16:49,049 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:49,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:16:49,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:49,050 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-14 23:16:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:49,071 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2019-10-14 23:16:49,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:16:49,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-14 23:16:49,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:49,074 INFO L225 Difference]: With dead ends: 36 [2019-10-14 23:16:49,074 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 23:16:49,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:49,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 23:16:49,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 23:16:49,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:16:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-14 23:16:49,082 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2019-10-14 23:16:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:49,083 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-14 23:16:49,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:16:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-14 23:16:49,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:16:49,087 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:49,087 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:49,087 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:49,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:49,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2019-10-14 23:16:49,089 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:49,089 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540318670] [2019-10-14 23:16:49,089 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:49,089 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:49,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:49,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540318670] [2019-10-14 23:16:49,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412500099] [2019-10-14 23:16:49,165 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 [2019-10-14 23:16:49,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:49,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:49,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:16:49,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:49,250 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:49,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-10-14 23:16:49,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350390084] [2019-10-14 23:16:49,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:16:49,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:49,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:16:49,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:16:49,253 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-10-14 23:16:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:49,303 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2019-10-14 23:16:49,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:49,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-10-14 23:16:49,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:49,307 INFO L225 Difference]: With dead ends: 32 [2019-10-14 23:16:49,307 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 23:16:49,307 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:16:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 23:16:49,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 23:16:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:16:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-14 23:16:49,313 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2019-10-14 23:16:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:49,314 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-14 23:16:49,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:16:49,316 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-14 23:16:49,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:16:49,317 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:49,318 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:49,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:49,520 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:49,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:49,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2019-10-14 23:16:49,520 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:49,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259460647] [2019-10-14 23:16:49,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:49,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:49,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:49,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259460647] [2019-10-14 23:16:49,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310454139] [2019-10-14 23:16:49,607 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 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 23:16:49,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:16:49,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:49,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:16:49,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:49,708 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:49,708 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-14 23:16:49,708 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734338179] [2019-10-14 23:16:49,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:16:49,709 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:49,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:16:49,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:16:49,710 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2019-10-14 23:16:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:49,770 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-10-14 23:16:49,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:16:49,770 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-10-14 23:16:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:49,771 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:16:49,771 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 23:16:49,772 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:16:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 23:16:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-14 23:16:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:16:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-14 23:16:49,786 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2019-10-14 23:16:49,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:49,786 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-14 23:16:49,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:16:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-14 23:16:49,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:16:49,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:49,787 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:49,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:49,989 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:49,989 INFO L82 PathProgramCache]: Analyzing trace with hash -971600090, now seen corresponding path program 2 times [2019-10-14 23:16:49,989 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:49,989 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450562474] [2019-10-14 23:16:49,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:49,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:49,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:16:50,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450562474] [2019-10-14 23:16:50,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437688533] [2019-10-14 23:16:50,184 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 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 23:16:50,219 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:50,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:50,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:16:50,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:50,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:50,442 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:50,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2019-10-14 23:16:50,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303739589] [2019-10-14 23:16:50,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:16:50,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:50,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:16:50,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:16:50,444 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 21 states. [2019-10-14 23:16:50,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:50,916 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-10-14 23:16:50,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:16:50,920 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2019-10-14 23:16:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:50,921 INFO L225 Difference]: With dead ends: 42 [2019-10-14 23:16:50,921 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:16:50,922 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:16:50,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:16:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2019-10-14 23:16:50,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:16:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-14 23:16:50,926 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2019-10-14 23:16:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:50,927 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-14 23:16:50,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:16:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-14 23:16:50,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:16:50,928 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:50,928 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:51,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:51,132 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:51,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:51,133 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2019-10-14 23:16:51,133 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:51,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864377760] [2019-10-14 23:16:51,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:51,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:51,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:51,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864377760] [2019-10-14 23:16:51,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038231377] [2019-10-14 23:16:51,210 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 23:16:51,247 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:51,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:51,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:16:51,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:51,328 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:51,328 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-10-14 23:16:51,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254850238] [2019-10-14 23:16:51,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:16:51,329 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:51,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:16:51,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:16:51,331 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2019-10-14 23:16:51,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:51,401 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-10-14 23:16:51,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:16:51,402 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-10-14 23:16:51,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:51,403 INFO L225 Difference]: With dead ends: 42 [2019-10-14 23:16:51,403 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:16:51,403 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:16:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:16:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-14 23:16:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:16:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-14 23:16:51,409 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2019-10-14 23:16:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:51,409 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-14 23:16:51,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:16:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-14 23:16:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:16:51,410 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:51,410 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:51,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:51,614 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2019-10-14 23:16:51,616 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:51,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600177789] [2019-10-14 23:16:51,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:51,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:51,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:51,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600177789] [2019-10-14 23:16:51,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495604572] [2019-10-14 23:16:51,748 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 23:16:51,779 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 23:16:51,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:51,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:16:51,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:51,885 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:51,885 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-10-14 23:16:51,885 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749293144] [2019-10-14 23:16:51,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:16:51,886 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:51,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:16:51,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:16:51,887 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 20 states. [2019-10-14 23:16:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:51,974 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2019-10-14 23:16:51,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:16:51,978 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2019-10-14 23:16:51,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:51,979 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:16:51,979 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:16:51,980 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:16:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:16:51,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2019-10-14 23:16:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 23:16:51,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-10-14 23:16:51,986 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2019-10-14 23:16:51,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:51,986 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-10-14 23:16:51,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:16:51,987 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-10-14 23:16:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:16:51,987 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:51,988 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:52,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:52,197 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:52,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:52,198 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2019-10-14 23:16:52,198 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:52,199 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462718378] [2019-10-14 23:16:52,199 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:52,199 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:52,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 23:16:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 23:16:52,253 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-14 23:16:52,256 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-14 23:16:52,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:16:52 BoogieIcfgContainer [2019-10-14 23:16:52,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:16:52,298 INFO L168 Benchmark]: Toolchain (without parser) took 5408.60 ms. Allocated memory was 137.9 MB in the beginning and 246.9 MB in the end (delta: 109.1 MB). Free memory was 103.4 MB in the beginning and 172.9 MB in the end (delta: -69.5 MB). Peak memory consumption was 39.5 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:52,299 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:16:52,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.30 ms. Allocated memory is still 137.9 MB. Free memory was 103.2 MB in the beginning and 93.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:52,301 INFO L168 Benchmark]: Boogie Preprocessor took 111.92 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 179.5 MB in the end (delta: -86.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:52,302 INFO L168 Benchmark]: RCFGBuilder took 239.70 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 167.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:52,303 INFO L168 Benchmark]: TraceAbstraction took 4811.67 ms. Allocated memory was 200.8 MB in the beginning and 246.9 MB in the end (delta: 46.1 MB). Free memory was 167.6 MB in the beginning and 172.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:52,306 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 240.30 ms. Allocated memory is still 137.9 MB. Free memory was 103.2 MB in the beginning and 93.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.92 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 179.5 MB in the end (delta: -86.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 239.70 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 167.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4811.67 ms. Allocated memory was 200.8 MB in the beginning and 246.9 MB in the end (delta: 46.1 MB). Free memory was 167.6 MB in the beginning and 172.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=0, n=6] [L13] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L14] COND TRUE i