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/array-examples/standard_copyInitSum_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:45:15,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:45:15,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:45:15,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:45:15,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:45:15,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:45:15,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:45:15,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:45:15,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:45:15,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:45:15,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:45:15,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:45:15,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:45:15,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:45:15,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:45:15,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:45:15,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:45:15,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:45:15,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:45:15,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:45:15,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:45:15,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:45:15,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:45:15,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:45:15,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:45:15,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:45:15,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:45:15,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:45:15,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:45:15,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:45:15,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:45:15,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:45:15,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:45:15,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:45:15,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:45:15,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:45:15,490 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 17:45:15,525 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:45:15,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:45:15,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:45:15,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:45:15,530 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:45:15,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:45:15,531 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:45:15,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:45:15,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:45:15,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:45:15,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:45:15,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:45:15,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:45:15,534 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:45:15,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:45:15,534 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:45:15,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:45:15,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:45:15,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:45:15,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:45:15,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:45:15,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:45:15,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:45:15,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:45:15,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:45:15,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:45:15,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:45:15,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:45:15,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:45:15,803 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:45:15,825 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:45:15,829 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:45:15,831 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:45:15,831 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:45:15,832 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2019-10-13 17:45:15,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a71ce611/80356a40511a4aa98f15d78c3b5289c3/FLAG70d06d3d6 [2019-10-13 17:45:16,390 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:45:16,391 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2019-10-13 17:45:16,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a71ce611/80356a40511a4aa98f15d78c3b5289c3/FLAG70d06d3d6 [2019-10-13 17:45:16,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a71ce611/80356a40511a4aa98f15d78c3b5289c3 [2019-10-13 17:45:16,761 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:45:16,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:45:16,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:45:16,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:45:16,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:45:16,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:45:16" (1/1) ... [2019-10-13 17:45:16,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af8c95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:16, skipping insertion in model container [2019-10-13 17:45:16,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:45:16" (1/1) ... [2019-10-13 17:45:16,785 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:45:16,804 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:45:17,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:45:17,086 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:45:17,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:45:17,141 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:45:17,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:17 WrapperNode [2019-10-13 17:45:17,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:45:17,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:45:17,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:45:17,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:45:17,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:17" (1/1) ... [2019-10-13 17:45:17,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:17" (1/1) ... [2019-10-13 17:45:17,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:17" (1/1) ... [2019-10-13 17:45:17,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:17" (1/1) ... [2019-10-13 17:45:17,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:17" (1/1) ... [2019-10-13 17:45:17,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:17" (1/1) ... [2019-10-13 17:45:17,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:17" (1/1) ... [2019-10-13 17:45:17,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:45:17,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:45:17,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:45:17,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:45:17,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:17" (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 17:45:17,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:45:17,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:45:17,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:45:17,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:45:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:45:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:45:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:45:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:45:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:45:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:45:17,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:45:17,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:45:17,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:45:17,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:45:17,694 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:45:17,694 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-13 17:45:17,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:45:17 BoogieIcfgContainer [2019-10-13 17:45:17,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:45:17,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:45:17,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:45:17,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:45:17,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:45:16" (1/3) ... [2019-10-13 17:45:17,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744017af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:45:17, skipping insertion in model container [2019-10-13 17:45:17,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:17" (2/3) ... [2019-10-13 17:45:17,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744017af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:45:17, skipping insertion in model container [2019-10-13 17:45:17,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:45:17" (3/3) ... [2019-10-13 17:45:17,716 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum_ground.i [2019-10-13 17:45:17,728 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:45:17,737 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:45:17,751 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:45:17,777 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:45:17,777 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:45:17,778 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:45:17,778 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:45:17,778 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:45:17,778 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:45:17,778 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:45:17,778 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:45:17,796 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-13 17:45:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 17:45:17,802 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:17,803 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:17,806 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:17,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:17,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1001985310, now seen corresponding path program 1 times [2019-10-13 17:45:17,819 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:17,819 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30509407] [2019-10-13 17:45:17,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:17,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:17,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:18,005 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 17:45:18,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30509407] [2019-10-13 17:45:18,006 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:45:18,007 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:45:18,007 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822401272] [2019-10-13 17:45:18,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:45:18,012 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:18,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:45:18,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:45:18,025 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-10-13 17:45:18,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:18,145 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2019-10-13 17:45:18,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:45:18,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-13 17:45:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:18,154 INFO L225 Difference]: With dead ends: 51 [2019-10-13 17:45:18,154 INFO L226 Difference]: Without dead ends: 24 [2019-10-13 17:45:18,157 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:45:18,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-13 17:45:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-13 17:45:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 17:45:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-10-13 17:45:18,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2019-10-13 17:45:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:18,193 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-10-13 17:45:18,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:45:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-10-13 17:45:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 17:45:18,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:18,195 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:18,195 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:18,196 INFO L82 PathProgramCache]: Analyzing trace with hash -400143846, now seen corresponding path program 1 times [2019-10-13 17:45:18,196 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:18,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647922543] [2019-10-13 17:45:18,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:18,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:18,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:18,284 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 17:45:18,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647922543] [2019-10-13 17:45:18,285 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:45:18,285 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:45:18,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422021879] [2019-10-13 17:45:18,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:45:18,290 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:18,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:45:18,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:45:18,291 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2019-10-13 17:45:18,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:18,420 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-13 17:45:18,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:45:18,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-13 17:45:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:18,422 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:45:18,422 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 17:45:18,423 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:45:18,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 17:45:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-10-13 17:45:18,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:45:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-13 17:45:18,432 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2019-10-13 17:45:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:18,432 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-13 17:45:18,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:45:18,433 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-13 17:45:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:45:18,434 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:18,434 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, 1, 1] [2019-10-13 17:45:18,434 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:18,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1150570790, now seen corresponding path program 1 times [2019-10-13 17:45:18,435 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:18,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78602101] [2019-10-13 17:45:18,436 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:18,436 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:18,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:45:18,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78602101] [2019-10-13 17:45:18,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696863697] [2019-10-13 17:45:18,554 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 17:45:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:18,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:45:18,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:45:18,648 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:18,648 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:45:18,649 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713553401] [2019-10-13 17:45:18,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:45:18,650 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:18,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:45:18,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:45:18,651 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2019-10-13 17:45:18,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:18,761 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2019-10-13 17:45:18,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:45:18,761 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-13 17:45:18,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:18,763 INFO L225 Difference]: With dead ends: 53 [2019-10-13 17:45:18,763 INFO L226 Difference]: Without dead ends: 34 [2019-10-13 17:45:18,764 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:45:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-13 17:45:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-10-13 17:45:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 17:45:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-10-13 17:45:18,771 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2019-10-13 17:45:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:18,772 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-10-13 17:45:18,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:45:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-10-13 17:45:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 17:45:18,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:18,773 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:18,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:18,978 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:18,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:18,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1868122094, now seen corresponding path program 2 times [2019-10-13 17:45:18,979 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:18,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038231377] [2019-10-13 17:45:18,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:18,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:18,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 17:45:19,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038231377] [2019-10-13 17:45:19,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263485795] [2019-10-13 17:45:19,105 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 17:45:19,184 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:45:19,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:19,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:45:19,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:45:19,202 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:19,203 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:45:19,203 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903881852] [2019-10-13 17:45:19,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:45:19,204 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:19,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:45:19,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:45:19,204 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2019-10-13 17:45:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:19,316 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-10-13 17:45:19,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:45:19,317 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-10-13 17:45:19,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:19,318 INFO L225 Difference]: With dead ends: 62 [2019-10-13 17:45:19,318 INFO L226 Difference]: Without dead ends: 39 [2019-10-13 17:45:19,319 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:45:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-13 17:45:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-10-13 17:45:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 17:45:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2019-10-13 17:45:19,326 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2019-10-13 17:45:19,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:19,326 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2019-10-13 17:45:19,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:45:19,327 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2019-10-13 17:45:19,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:45:19,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:19,328 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:19,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:19,532 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:19,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:19,534 INFO L82 PathProgramCache]: Analyzing trace with hash 150752210, now seen corresponding path program 3 times [2019-10-13 17:45:19,534 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:19,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771562265] [2019-10-13 17:45:19,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:19,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:19,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 17:45:19,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771562265] [2019-10-13 17:45:19,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282748266] [2019-10-13 17:45:19,628 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 [2019-10-13 17:45:19,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:45:19,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:19,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:45:19,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 17:45:19,690 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:19,690 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-13 17:45:19,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20337776] [2019-10-13 17:45:19,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:45:19,691 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:19,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:45:19,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:45:19,692 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 8 states. [2019-10-13 17:45:19,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:19,815 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2019-10-13 17:45:19,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:45:19,816 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-10-13 17:45:19,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:19,817 INFO L225 Difference]: With dead ends: 71 [2019-10-13 17:45:19,817 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 17:45:19,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:45:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 17:45:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-10-13 17:45:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 17:45:19,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-10-13 17:45:19,824 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2019-10-13 17:45:19,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:19,825 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-10-13 17:45:19,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:45:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-10-13 17:45:19,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-13 17:45:19,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:19,826 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:20,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:20,030 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:20,031 INFO L82 PathProgramCache]: Analyzing trace with hash -125121014, now seen corresponding path program 4 times [2019-10-13 17:45:20,031 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:20,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441455647] [2019-10-13 17:45:20,032 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:20,032 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:20,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 17:45:20,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441455647] [2019-10-13 17:45:20,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2938486] [2019-10-13 17:45:20,188 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 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 [2019-10-13 17:45:20,238 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:45:20,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:20,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:45:20,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 17:45:20,262 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:20,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:45:20,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292189035] [2019-10-13 17:45:20,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:45:20,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:20,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:45:20,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:45:20,264 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 9 states. [2019-10-13 17:45:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:20,362 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-13 17:45:20,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:45:20,363 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-10-13 17:45:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:20,364 INFO L225 Difference]: With dead ends: 80 [2019-10-13 17:45:20,366 INFO L226 Difference]: Without dead ends: 49 [2019-10-13 17:45:20,366 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:45:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-13 17:45:20,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-10-13 17:45:20,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 17:45:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-10-13 17:45:20,381 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2019-10-13 17:45:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:20,381 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-10-13 17:45:20,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:45:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-10-13 17:45:20,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 17:45:20,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:20,384 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:20,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:20,589 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1558523702, now seen corresponding path program 5 times [2019-10-13 17:45:20,590 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:20,590 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858667467] [2019-10-13 17:45:20,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:20,591 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:20,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-13 17:45:20,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858667467] [2019-10-13 17:45:20,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23367884] [2019-10-13 17:45:20,729 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 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 [2019-10-13 17:45:21,028 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 17:45:21,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:21,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:45:21,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 17:45:21,062 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:21,070 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-13 17:45:21,071 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981888055] [2019-10-13 17:45:21,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:45:21,072 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:21,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:45:21,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:45:21,072 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 10 states. [2019-10-13 17:45:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:21,201 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2019-10-13 17:45:21,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:45:21,202 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2019-10-13 17:45:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:21,203 INFO L225 Difference]: With dead ends: 89 [2019-10-13 17:45:21,203 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 17:45:21,204 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:45:21,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 17:45:21,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-10-13 17:45:21,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-13 17:45:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-10-13 17:45:21,210 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2019-10-13 17:45:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:21,211 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-10-13 17:45:21,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:45:21,211 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-10-13 17:45:21,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 17:45:21,212 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:21,212 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:21,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:21,417 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:21,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1349350398, now seen corresponding path program 6 times [2019-10-13 17:45:21,418 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:21,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214206274] [2019-10-13 17:45:21,419 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:21,419 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:21,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-13 17:45:21,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214206274] [2019-10-13 17:45:21,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869672052] [2019-10-13 17:45:21,569 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-13 17:45:21,763 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:45:21,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:21,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:45:21,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-13 17:45:21,784 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:21,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-13 17:45:21,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080937698] [2019-10-13 17:45:21,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:45:21,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:21,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:45:21,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:45:21,786 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 11 states. [2019-10-13 17:45:21,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:21,923 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2019-10-13 17:45:21,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:45:21,923 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2019-10-13 17:45:21,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:21,925 INFO L225 Difference]: With dead ends: 98 [2019-10-13 17:45:21,925 INFO L226 Difference]: Without dead ends: 59 [2019-10-13 17:45:21,925 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:45:21,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-13 17:45:21,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-13 17:45:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:45:21,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2019-10-13 17:45:21,932 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2019-10-13 17:45:21,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:21,933 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2019-10-13 17:45:21,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:45:21,933 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2019-10-13 17:45:21,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:45:21,934 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:21,934 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:22,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:22,139 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:22,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:22,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1128841790, now seen corresponding path program 7 times [2019-10-13 17:45:22,139 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:22,139 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037748998] [2019-10-13 17:45:22,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:22,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:22,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-13 17:45:22,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037748998] [2019-10-13 17:45:22,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543796864] [2019-10-13 17:45:22,276 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:22,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:45:22,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-13 17:45:22,357 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:22,357 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:45:22,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891602517] [2019-10-13 17:45:22,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:45:22,361 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:22,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:45:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:45:22,361 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 12 states. [2019-10-13 17:45:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:22,483 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2019-10-13 17:45:22,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:45:22,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2019-10-13 17:45:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:22,485 INFO L225 Difference]: With dead ends: 107 [2019-10-13 17:45:22,485 INFO L226 Difference]: Without dead ends: 64 [2019-10-13 17:45:22,486 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:45:22,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-13 17:45:22,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-10-13 17:45:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-13 17:45:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2019-10-13 17:45:22,493 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 52 [2019-10-13 17:45:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:22,494 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2019-10-13 17:45:22,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:45:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2019-10-13 17:45:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 17:45:22,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:22,495 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:22,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:22,697 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:22,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:22,705 INFO L82 PathProgramCache]: Analyzing trace with hash -612503046, now seen corresponding path program 8 times [2019-10-13 17:45:22,706 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:22,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402073391] [2019-10-13 17:45:22,706 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:22,706 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:22,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-13 17:45:22,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402073391] [2019-10-13 17:45:22,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625895264] [2019-10-13 17:45:22,821 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:22,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:45:22,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:22,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:45:22,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-13 17:45:22,900 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:22,900 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:45:22,901 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369029882] [2019-10-13 17:45:22,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:45:22,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:22,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:45:22,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:45:22,902 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 13 states. [2019-10-13 17:45:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:23,037 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2019-10-13 17:45:23,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:45:23,037 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2019-10-13 17:45:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:23,038 INFO L225 Difference]: With dead ends: 116 [2019-10-13 17:45:23,038 INFO L226 Difference]: Without dead ends: 69 [2019-10-13 17:45:23,039 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:45:23,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-13 17:45:23,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-10-13 17:45:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-13 17:45:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2019-10-13 17:45:23,046 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2019-10-13 17:45:23,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:23,047 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2019-10-13 17:45:23,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:45:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2019-10-13 17:45:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-13 17:45:23,048 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:23,048 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:23,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:23,256 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:23,256 INFO L82 PathProgramCache]: Analyzing trace with hash -490630470, now seen corresponding path program 9 times [2019-10-13 17:45:23,256 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:23,257 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036262472] [2019-10-13 17:45:23,257 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:23,257 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:23,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-13 17:45:23,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036262472] [2019-10-13 17:45:23,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800121478] [2019-10-13 17:45:23,382 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:23,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:45:23,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:23,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:45:23,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-13 17:45:23,599 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:23,599 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-13 17:45:23,599 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319978637] [2019-10-13 17:45:23,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:45:23,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:23,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:45:23,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:45:23,602 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 14 states. [2019-10-13 17:45:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:23,794 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2019-10-13 17:45:23,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:45:23,794 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2019-10-13 17:45:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:23,795 INFO L225 Difference]: With dead ends: 125 [2019-10-13 17:45:23,795 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:45:23,796 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:45:23,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:45:23,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2019-10-13 17:45:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-13 17:45:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2019-10-13 17:45:23,803 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 62 [2019-10-13 17:45:23,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:23,803 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2019-10-13 17:45:23,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:45:23,804 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2019-10-13 17:45:23,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-13 17:45:23,805 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:23,805 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:24,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:24,009 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:24,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:24,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1207107598, now seen corresponding path program 10 times [2019-10-13 17:45:24,010 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:24,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968108589] [2019-10-13 17:45:24,011 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:24,011 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:24,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-10-13 17:45:24,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968108589] [2019-10-13 17:45:24,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166819757] [2019-10-13 17:45:24,152 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:24,231 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:45:24,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:24,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:45:24,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-13 17:45:24,265 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:24,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-13 17:45:24,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021189481] [2019-10-13 17:45:24,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:45:24,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:24,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:45:24,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:45:24,267 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 15 states. [2019-10-13 17:45:24,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:24,459 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-10-13 17:45:24,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:45:24,460 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2019-10-13 17:45:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:24,461 INFO L225 Difference]: With dead ends: 134 [2019-10-13 17:45:24,461 INFO L226 Difference]: Without dead ends: 79 [2019-10-13 17:45:24,462 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:45:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-13 17:45:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-13 17:45:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 17:45:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2019-10-13 17:45:24,476 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2019-10-13 17:45:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:24,476 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2019-10-13 17:45:24,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:45:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2019-10-13 17:45:24,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 17:45:24,486 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:24,486 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:24,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:24,687 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:24,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2083114930, now seen corresponding path program 11 times [2019-10-13 17:45:24,688 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:24,688 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528317950] [2019-10-13 17:45:24,688 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:24,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:24,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-10-13 17:45:24,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528317950] [2019-10-13 17:45:24,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655939297] [2019-10-13 17:45:24,877 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:40,055 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-13 17:45:40,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:40,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:45:40,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:45:40,093 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:40,094 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-13 17:45:40,094 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061854132] [2019-10-13 17:45:40,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:45:40,095 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:40,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:45:40,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:45:40,096 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 16 states. [2019-10-13 17:45:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:40,320 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2019-10-13 17:45:40,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:45:40,321 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2019-10-13 17:45:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:40,323 INFO L225 Difference]: With dead ends: 143 [2019-10-13 17:45:40,323 INFO L226 Difference]: Without dead ends: 84 [2019-10-13 17:45:40,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:45:40,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-13 17:45:40,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2019-10-13 17:45:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-13 17:45:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2019-10-13 17:45:40,330 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 72 [2019-10-13 17:45:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:40,331 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2019-10-13 17:45:40,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:45:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2019-10-13 17:45:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-13 17:45:40,332 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:40,332 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:40,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:40,554 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:40,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:40,555 INFO L82 PathProgramCache]: Analyzing trace with hash 385857002, now seen corresponding path program 12 times [2019-10-13 17:45:40,555 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:40,555 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407557160] [2019-10-13 17:45:40,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:40,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:40,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-13 17:45:40,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407557160] [2019-10-13 17:45:40,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368064082] [2019-10-13 17:45:40,761 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:54,191 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 17:45:54,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:54,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 17:45:54,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-13 17:45:54,262 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:54,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-10-13 17:45:54,263 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079862032] [2019-10-13 17:45:54,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:45:54,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:54,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:45:54,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:45:54,265 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 17 states. [2019-10-13 17:45:54,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:54,402 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2019-10-13 17:45:54,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 17:45:54,403 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2019-10-13 17:45:54,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:54,404 INFO L225 Difference]: With dead ends: 152 [2019-10-13 17:45:54,404 INFO L226 Difference]: Without dead ends: 89 [2019-10-13 17:45:54,405 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:45:54,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-13 17:45:54,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-10-13 17:45:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-13 17:45:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2019-10-13 17:45:54,412 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 77 [2019-10-13 17:45:54,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:54,412 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2019-10-13 17:45:54,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:45:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2019-10-13 17:45:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-13 17:45:54,414 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:54,414 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:54,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:54,627 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:54,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:54,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1239413930, now seen corresponding path program 13 times [2019-10-13 17:45:54,627 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:54,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109681694] [2019-10-13 17:45:54,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:54,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:54,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-10-13 17:45:54,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109681694] [2019-10-13 17:45:54,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564428048] [2019-10-13 17:45:54,792 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:54,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:45:54,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-10-13 17:45:54,898 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:54,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:45:54,899 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041744223] [2019-10-13 17:45:54,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:45:54,900 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:54,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:45:54,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:45:54,901 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 18 states. [2019-10-13 17:45:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:55,092 INFO L93 Difference]: Finished difference Result 161 states and 169 transitions. [2019-10-13 17:45:55,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:45:55,092 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2019-10-13 17:45:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:55,094 INFO L225 Difference]: With dead ends: 161 [2019-10-13 17:45:55,094 INFO L226 Difference]: Without dead ends: 94 [2019-10-13 17:45:55,095 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:45:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-13 17:45:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-10-13 17:45:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-13 17:45:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2019-10-13 17:45:55,109 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 82 [2019-10-13 17:45:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:55,110 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2019-10-13 17:45:55,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:45:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2019-10-13 17:45:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 17:45:55,113 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:55,113 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:55,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:55,326 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:55,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:55,326 INFO L82 PathProgramCache]: Analyzing trace with hash -535424030, now seen corresponding path program 14 times [2019-10-13 17:45:55,327 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:55,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937777305] [2019-10-13 17:45:55,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:55,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:55,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-13 17:45:55,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937777305] [2019-10-13 17:45:55,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943925047] [2019-10-13 17:45:55,512 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:55,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:45:55,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:55,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:45:55,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-13 17:45:55,608 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:55,608 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:45:55,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779664804] [2019-10-13 17:45:55,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:45:55,609 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:55,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:45:55,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:45:55,610 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 19 states. [2019-10-13 17:45:55,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:55,839 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2019-10-13 17:45:55,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:45:55,839 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2019-10-13 17:45:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:55,840 INFO L225 Difference]: With dead ends: 170 [2019-10-13 17:45:55,840 INFO L226 Difference]: Without dead ends: 99 [2019-10-13 17:45:55,841 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:45:55,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-13 17:45:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-10-13 17:45:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-13 17:45:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2019-10-13 17:45:55,847 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 87 [2019-10-13 17:45:55,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:55,848 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2019-10-13 17:45:55,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:45:55,848 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2019-10-13 17:45:55,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-13 17:45:55,849 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:55,849 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:56,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:56,054 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:56,054 INFO L82 PathProgramCache]: Analyzing trace with hash -422313566, now seen corresponding path program 15 times [2019-10-13 17:45:56,054 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:56,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080427263] [2019-10-13 17:45:56,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:56,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:56,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-13 17:45:56,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080427263] [2019-10-13 17:45:56,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600312699] [2019-10-13 17:45:56,300 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:59,887 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 17:45:59,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:59,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 17:45:59,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-13 17:45:59,912 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:59,912 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-13 17:45:59,912 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715104025] [2019-10-13 17:45:59,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:45:59,913 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:59,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:45:59,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:45:59,914 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 20 states. [2019-10-13 17:46:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:00,133 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2019-10-13 17:46:00,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:46:00,133 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2019-10-13 17:46:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:00,135 INFO L225 Difference]: With dead ends: 179 [2019-10-13 17:46:00,135 INFO L226 Difference]: Without dead ends: 104 [2019-10-13 17:46:00,136 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:46:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-13 17:46:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2019-10-13 17:46:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-13 17:46:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2019-10-13 17:46:00,141 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 92 [2019-10-13 17:46:00,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:00,142 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2019-10-13 17:46:00,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:46:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2019-10-13 17:46:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-13 17:46:00,143 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:00,143 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:00,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:00,350 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:00,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:00,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1861215782, now seen corresponding path program 16 times [2019-10-13 17:46:00,351 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:00,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813353918] [2019-10-13 17:46:00,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:00,352 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:00,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2019-10-13 17:46:00,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813353918] [2019-10-13 17:46:00,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986898463] [2019-10-13 17:46:00,587 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:00,674 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:46:00,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:00,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:46:00,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-13 17:46:00,722 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:00,722 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:46:00,723 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500895600] [2019-10-13 17:46:00,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:46:00,724 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:00,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:46:00,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:46:00,726 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 21 states. [2019-10-13 17:46:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:00,952 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-10-13 17:46:00,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:46:00,953 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2019-10-13 17:46:00,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:00,954 INFO L225 Difference]: With dead ends: 188 [2019-10-13 17:46:00,954 INFO L226 Difference]: Without dead ends: 109 [2019-10-13 17:46:00,955 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:46:00,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-13 17:46:00,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-10-13 17:46:00,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-13 17:46:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2019-10-13 17:46:00,960 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 97 [2019-10-13 17:46:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:00,960 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2019-10-13 17:46:00,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:46:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2019-10-13 17:46:00,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 17:46:00,961 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:00,962 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:01,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:01,171 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:01,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1207301786, now seen corresponding path program 17 times [2019-10-13 17:46:01,172 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:01,172 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961826706] [2019-10-13 17:46:01,172 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:01,172 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:01,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2019-10-13 17:46:01,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961826706] [2019-10-13 17:46:01,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129780445] [2019-10-13 17:46:01,404 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true