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-crafted/bAnd4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:41:12,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:41:12,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:41:12,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:41:12,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:41:12,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:41:12,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:41:12,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:41:12,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:41:12,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:41:12,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:41:12,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:41:12,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:41:12,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:41:12,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:41:12,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:41:12,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:41:12,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:41:12,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:41:12,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:41:12,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:41:12,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:41:12,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:41:12,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:41:12,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:41:12,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:41:12,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:41:12,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:41:12,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:41:12,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:41:12,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:41:12,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:41:12,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:41:12,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:41:12,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:41:12,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:41:12,779 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 17:41:12,793 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:41:12,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:41:12,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:41:12,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:41:12,796 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:41:12,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:41:12,796 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:41:12,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:41:12,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:41:12,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:41:12,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:41:12,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:41:12,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:41:12,797 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:41:12,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:41:12,798 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:41:12,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:41:12,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:41:12,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:41:12,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:41:12,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:41:12,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:41:12,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:41:12,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:41:12,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:41:12,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:41:12,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:41:12,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:41:12,802 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:41:13,113 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:41:13,127 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:41:13,131 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:41:13,133 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:41:13,133 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:41:13,134 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd4.i [2019-10-13 17:41:13,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aa0fa835/065b9359948345d9b4e56e8a293205fc/FLAG0b9a10710 [2019-10-13 17:41:13,671 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:41:13,672 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd4.i [2019-10-13 17:41:13,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aa0fa835/065b9359948345d9b4e56e8a293205fc/FLAG0b9a10710 [2019-10-13 17:41:14,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aa0fa835/065b9359948345d9b4e56e8a293205fc [2019-10-13 17:41:14,063 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:41:14,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:41:14,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:41:14,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:41:14,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:41:14,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e0286db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14, skipping insertion in model container [2019-10-13 17:41:14,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,080 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:41:14,097 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:41:14,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:41:14,304 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:41:14,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:41:14,336 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:41:14,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14 WrapperNode [2019-10-13 17:41:14,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:41:14,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:41:14,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:41:14,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:41:14,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:41:14,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:41:14,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:41:14,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:41:14,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (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 17:41:14,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:41:14,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:41:14,542 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2019-10-13 17:41:14,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:41:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:41:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:41:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2019-10-13 17:41:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:41:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:41:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:41:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:41:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:41:14,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:41:14,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:41:14,848 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:41:14,848 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 17:41:14,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:41:14 BoogieIcfgContainer [2019-10-13 17:41:14,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:41:14,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:41:14,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:41:14,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:41:14,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:41:14" (1/3) ... [2019-10-13 17:41:14,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6ce756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:41:14, skipping insertion in model container [2019-10-13 17:41:14,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (2/3) ... [2019-10-13 17:41:14,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6ce756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:41:14, skipping insertion in model container [2019-10-13 17:41:14,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:41:14" (3/3) ... [2019-10-13 17:41:14,862 INFO L109 eAbstractionObserver]: Analyzing ICFG bAnd4.i [2019-10-13 17:41:14,874 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:41:14,881 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:41:14,900 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:41:14,932 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:41:14,932 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:41:14,933 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:41:14,933 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:41:14,933 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:41:14,933 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:41:14,933 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:41:14,933 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:41:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-13 17:41:14,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:41:14,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:14,960 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:14,961 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:14,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-10-13 17:41:14,973 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:14,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135465232] [2019-10-13 17:41:14,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:14,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:14,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:41:15,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135465232] [2019-10-13 17:41:15,185 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:41:15,186 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:41:15,186 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551786380] [2019-10-13 17:41:15,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:15,193 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:15,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:15,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:41:15,212 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-13 17:41:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:15,335 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-13 17:41:15,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:15,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-13 17:41:15,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:15,353 INFO L225 Difference]: With dead ends: 54 [2019-10-13 17:41:15,354 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 17:41:15,359 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 17:41:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 17:41:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 17:41:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 17:41:15,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-13 17:41:15,399 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-10-13 17:41:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:15,400 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-13 17:41:15,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-13 17:41:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:41:15,403 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:15,403 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:15,403 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:15,404 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-10-13 17:41:15,404 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:15,405 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543326180] [2019-10-13 17:41:15,405 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,405 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:41:15,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543326180] [2019-10-13 17:41:15,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994383823] [2019-10-13 17:41:15,551 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 17:41:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 17:41:15,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:41:15,654 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:41:15,654 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 17:41:15,654 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155709200] [2019-10-13 17:41:15,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:15,656 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:15,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:15,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:41:15,657 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-10-13 17:41:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:15,673 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-13 17:41:15,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:15,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-13 17:41:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:15,674 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:41:15,675 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 17:41:15,676 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:41:15,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 17:41:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-13 17:41:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:41:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-13 17:41:15,685 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-13 17:41:15,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:15,685 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-13 17:41:15,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:15,685 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-13 17:41:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 17:41:15,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:15,687 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 17:41:15,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:15,889 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:15,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:15,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-10-13 17:41:15,889 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:15,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009450091] [2019-10-13 17:41:15,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 17:41:15,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009450091] [2019-10-13 17:41:15,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128698959] [2019-10-13 17:41:15,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 17:41:16,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:41:16,056 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:41:16,056 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-13 17:41:16,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656730605] [2019-10-13 17:41:16,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:16,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:16,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:16,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:41:16,074 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-13 17:41:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:16,091 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-13 17:41:16,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:16,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-13 17:41:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:16,093 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:41:16,093 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 17:41:16,094 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 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 17:41:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 17:41:16,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-13 17:41:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 17:41:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-13 17:41:16,101 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-10-13 17:41:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:16,101 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-13 17:41:16,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-13 17:41:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 17:41:16,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:16,103 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 17:41:16,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:16,315 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:16,316 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-10-13 17:41:16,316 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:16,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744289243] [2019-10-13 17:41:16,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,317 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:41:16,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744289243] [2019-10-13 17:41:16,452 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897793511] [2019-10-13 17:41:16,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 17:41:16,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 17:41:16,541 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:41:16,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:41:16,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111245740] [2019-10-13 17:41:16,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:16,542 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:16,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:16,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:16,545 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-13 17:41:16,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:16,562 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-13 17:41:16,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:16,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-13 17:41:16,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:16,564 INFO L225 Difference]: With dead ends: 43 [2019-10-13 17:41:16,565 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 17:41:16,567 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:16,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 17:41:16,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-13 17:41:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:41:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-13 17:41:16,577 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-10-13 17:41:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:16,582 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-13 17:41:16,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-13 17:41:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 17:41:16,584 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:16,584 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 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 17:41:16,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:16,796 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:16,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-10-13 17:41:16,796 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:16,797 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132581863] [2019-10-13 17:41:16,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:41:16,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132581863] [2019-10-13 17:41:16,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716455393] [2019-10-13 17:41:16,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:41:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:41:16,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 17:41:17,014 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:17,014 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-10-13 17:41:17,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594795401] [2019-10-13 17:41:17,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:41:17,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:17,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:41:17,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:41:17,016 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-13 17:41:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:17,162 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-13 17:41:17,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:41:17,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-13 17:41:17,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:17,164 INFO L225 Difference]: With dead ends: 55 [2019-10-13 17:41:17,164 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 17:41:17,165 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:41:17,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 17:41:17,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-13 17:41:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 17:41:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-13 17:41:17,172 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-10-13 17:41:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:17,172 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-13 17:41:17,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:41:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-13 17:41:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 17:41:17,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:17,174 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 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 17:41:17,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:17,386 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:17,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:17,387 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-10-13 17:41:17,387 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:17,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466539598] [2019-10-13 17:41:17,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:41:17,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466539598] [2019-10-13 17:41:17,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723993085] [2019-10-13 17:41:17,529 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 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 17:41:17,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:17,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:17,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:41:17,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:41:17,608 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:17,609 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:41:17,609 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891818878] [2019-10-13 17:41:17,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:41:17,610 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:17,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:41:17,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:17,611 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-13 17:41:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:17,706 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-13 17:41:17,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:41:17,706 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-13 17:41:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:17,707 INFO L225 Difference]: With dead ends: 58 [2019-10-13 17:41:17,707 INFO L226 Difference]: Without dead ends: 36 [2019-10-13 17:41:17,708 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 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 17:41:17,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-13 17:41:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-13 17:41:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 17:41:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-13 17:41:17,716 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-10-13 17:41:17,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:17,717 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-13 17:41:17,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:41:17,717 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-13 17:41:17,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:41:17,719 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:17,719 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 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 17:41:17,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:17,920 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:17,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-10-13 17:41:17,921 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:17,922 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865301501] [2019-10-13 17:41:17,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:41:18,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865301501] [2019-10-13 17:41:18,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549772104] [2019-10-13 17:41:18,040 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 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 17:41:18,105 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:41:18,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:18,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:41:18,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 17:41:18,154 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:18,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-13 17:41:18,155 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600425066] [2019-10-13 17:41:18,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:41:18,157 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:18,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:41:18,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:18,158 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-10-13 17:41:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:18,288 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-13 17:41:18,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:41:18,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-13 17:41:18,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:18,290 INFO L225 Difference]: With dead ends: 63 [2019-10-13 17:41:18,290 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 17:41:18,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:18,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 17:41:18,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-13 17:41:18,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 17:41:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-13 17:41:18,306 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-10-13 17:41:18,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:18,307 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-13 17:41:18,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:41:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-13 17:41:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:41:18,308 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:18,310 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:18,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:18,512 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:18,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-10-13 17:41:18,512 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:18,512 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65385139] [2019-10-13 17:41:18,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:41:18,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65385139] [2019-10-13 17:41:18,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546907921] [2019-10-13 17:41:18,600 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 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 17:41:18,658 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:18,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:18,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:41:18,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:41:18,696 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:18,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:41:18,697 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538976805] [2019-10-13 17:41:18,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:41:18,698 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:18,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:41:18,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:18,699 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-10-13 17:41:18,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:18,801 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-13 17:41:18,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:41:18,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-10-13 17:41:18,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:18,803 INFO L225 Difference]: With dead ends: 66 [2019-10-13 17:41:18,803 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 17:41:18,803 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 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 17:41:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 17:41:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-13 17:41:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 17:41:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-13 17:41:18,814 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-10-13 17:41:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:18,815 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-13 17:41:18,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:41:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-13 17:41:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 17:41:18,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:18,820 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:19,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:19,024 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:19,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:19,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1995640301, now seen corresponding path program 5 times [2019-10-13 17:41:19,025 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:19,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697111361] [2019-10-13 17:41:19,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:41:19,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697111361] [2019-10-13 17:41:19,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496001487] [2019-10-13 17:41:19,141 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 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 17:41:19,221 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 17:41:19,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:19,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:41:19,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 17:41:19,275 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:19,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 17:41:19,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298694941] [2019-10-13 17:41:19,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:41:19,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:19,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:41:19,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:41:19,279 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-10-13 17:41:19,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:19,450 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-13 17:41:19,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:41:19,451 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-13 17:41:19,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:19,452 INFO L225 Difference]: With dead ends: 71 [2019-10-13 17:41:19,452 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 17:41:19,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:41:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 17:41:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-13 17:41:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 17:41:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-13 17:41:19,458 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-10-13 17:41:19,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:19,459 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-13 17:41:19,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:41:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-13 17:41:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 17:41:19,460 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:19,460 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:19,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:19,662 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:19,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:19,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1611767219, now seen corresponding path program 6 times [2019-10-13 17:41:19,663 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:19,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619877889] [2019-10-13 17:41:19,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-13 17:41:19,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619877889] [2019-10-13 17:41:19,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309241344] [2019-10-13 17:41:19,767 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 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 17:41:19,839 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:41:19,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:19,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:41:19,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-13 17:41:19,897 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:19,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-13 17:41:19,898 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185480199] [2019-10-13 17:41:19,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:41:19,899 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:19,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:41:19,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:41:19,900 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-13 17:41:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:20,079 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-10-13 17:41:20,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:41:20,080 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-13 17:41:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:20,081 INFO L225 Difference]: With dead ends: 77 [2019-10-13 17:41:20,081 INFO L226 Difference]: Without dead ends: 51 [2019-10-13 17:41:20,082 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:41:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-13 17:41:20,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-10-13 17:41:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:41:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-13 17:41:20,087 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-10-13 17:41:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:20,088 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-13 17:41:20,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:41:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-13 17:41:20,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-13 17:41:20,089 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:20,089 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:20,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:20,293 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:20,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:20,294 INFO L82 PathProgramCache]: Analyzing trace with hash -133387091, now seen corresponding path program 7 times [2019-10-13 17:41:20,294 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:20,295 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696107398] [2019-10-13 17:41:20,295 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:20,295 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:20,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:20,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696107398] [2019-10-13 17:41:20,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595945156] [2019-10-13 17:41:20,415 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 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 17:41:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:41:20,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:20,529 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:20,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:41:20,529 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777441166] [2019-10-13 17:41:20,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:41:20,530 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:20,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:41:20,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:41:20,531 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-10-13 17:41:20,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:20,608 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-13 17:41:20,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:41:20,608 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-10-13 17:41:20,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:20,609 INFO L225 Difference]: With dead ends: 80 [2019-10-13 17:41:20,609 INFO L226 Difference]: Without dead ends: 52 [2019-10-13 17:41:20,610 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 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 17:41:20,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-13 17:41:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-13 17:41:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 17:41:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-13 17:41:20,616 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-10-13 17:41:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:20,616 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-13 17:41:20,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:41:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-13 17:41:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-13 17:41:20,618 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:20,618 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:20,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:20,822 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:20,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:20,823 INFO L82 PathProgramCache]: Analyzing trace with hash -430428529, now seen corresponding path program 8 times [2019-10-13 17:41:20,823 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:20,824 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311912874] [2019-10-13 17:41:20,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:20,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:20,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:20,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311912874] [2019-10-13 17:41:20,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070490573] [2019-10-13 17:41:20,945 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 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 17:41:21,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:21,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:21,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:41:21,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:21,053 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:21,053 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:41:21,053 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477390152] [2019-10-13 17:41:21,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:41:21,054 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:21,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:41:21,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:41:21,056 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-10-13 17:41:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:21,158 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-10-13 17:41:21,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:41:21,159 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-10-13 17:41:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:21,160 INFO L225 Difference]: With dead ends: 82 [2019-10-13 17:41:21,160 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 17:41:21,161 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 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 17:41:21,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 17:41:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-13 17:41:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 17:41:21,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-10-13 17:41:21,172 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-10-13 17:41:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:21,172 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-10-13 17:41:21,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:41:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-10-13 17:41:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 17:41:21,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:21,174 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:21,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:21,387 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:21,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:21,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1875558385, now seen corresponding path program 9 times [2019-10-13 17:41:21,387 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:21,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132803529] [2019-10-13 17:41:21,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:21,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:21,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:21,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132803529] [2019-10-13 17:41:21,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430772402] [2019-10-13 17:41:21,526 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 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 17:41:21,597 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 17:41:21,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:21,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:41:21,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-13 17:41:21,653 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:21,654 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-13 17:41:21,654 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865106296] [2019-10-13 17:41:21,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:41:21,658 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:21,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:41:21,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:41:21,659 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-10-13 17:41:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:21,848 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-10-13 17:41:21,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 17:41:21,849 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-13 17:41:21,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:21,850 INFO L225 Difference]: With dead ends: 87 [2019-10-13 17:41:21,850 INFO L226 Difference]: Without dead ends: 59 [2019-10-13 17:41:21,851 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:41:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-13 17:41:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-13 17:41:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:41:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-10-13 17:41:21,858 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-10-13 17:41:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:21,858 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-10-13 17:41:21,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:41:21,858 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-10-13 17:41:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-13 17:41:21,859 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:21,859 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:22,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:22,063 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:22,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:22,064 INFO L82 PathProgramCache]: Analyzing trace with hash 237602385, now seen corresponding path program 10 times [2019-10-13 17:41:22,064 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:22,064 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306791104] [2019-10-13 17:41:22,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:22,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:22,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-13 17:41:22,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306791104] [2019-10-13 17:41:22,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209247793] [2019-10-13 17:41:22,212 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 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 17:41:22,294 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:22,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:22,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:41:22,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-13 17:41:22,379 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:22,379 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-13 17:41:22,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871915630] [2019-10-13 17:41:22,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:41:22,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:22,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:41:22,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:41:22,381 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-10-13 17:41:22,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:22,628 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-10-13 17:41:22,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:41:22,629 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-10-13 17:41:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:22,630 INFO L225 Difference]: With dead ends: 93 [2019-10-13 17:41:22,630 INFO L226 Difference]: Without dead ends: 63 [2019-10-13 17:41:22,631 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-13 17:41:22,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-13 17:41:22,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:41:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-13 17:41:22,642 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-10-13 17:41:22,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:22,642 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-13 17:41:22,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:41:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-13 17:41:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 17:41:22,643 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:22,643 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:22,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:22,847 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:22,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:22,848 INFO L82 PathProgramCache]: Analyzing trace with hash 537663665, now seen corresponding path program 11 times [2019-10-13 17:41:22,848 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:22,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281093399] [2019-10-13 17:41:22,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:22,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:22,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-10-13 17:41:23,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281093399] [2019-10-13 17:41:23,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222647994] [2019-10-13 17:41:23,033 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 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 17:41:23,308 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-13 17:41:23,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:23,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:41:23,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-13 17:41:23,401 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:23,402 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-13 17:41:23,402 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302938745] [2019-10-13 17:41:23,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:41:23,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:23,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:41:23,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:41:23,403 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-10-13 17:41:23,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:23,648 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-10-13 17:41:23,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:41:23,649 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-10-13 17:41:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:23,650 INFO L225 Difference]: With dead ends: 99 [2019-10-13 17:41:23,650 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 17:41:23,651 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:41:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 17:41:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-13 17:41:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-13 17:41:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-13 17:41:23,657 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-10-13 17:41:23,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:23,658 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-13 17:41:23,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:41:23,658 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-13 17:41:23,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 17:41:23,659 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:23,659 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:23,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:23,863 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:23,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:23,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1797792017, now seen corresponding path program 12 times [2019-10-13 17:41:23,864 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:23,864 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130152629] [2019-10-13 17:41:23,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:23,865 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:23,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-13 17:41:24,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130152629] [2019-10-13 17:41:24,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226129885] [2019-10-13 17:41:24,043 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 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 17:41:24,181 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-13 17:41:24,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:24,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:41:24,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-10-13 17:41:24,270 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:24,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-13 17:41:24,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822635623] [2019-10-13 17:41:24,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:41:24,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:41:24,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:41:24,272 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-10-13 17:41:24,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:24,448 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-10-13 17:41:24,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:41:24,449 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-13 17:41:24,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:24,450 INFO L225 Difference]: With dead ends: 105 [2019-10-13 17:41:24,450 INFO L226 Difference]: Without dead ends: 71 [2019-10-13 17:41:24,450 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:41:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-13 17:41:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-10-13 17:41:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-13 17:41:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-10-13 17:41:24,456 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-10-13 17:41:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:24,457 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-10-13 17:41:24,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:41:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-10-13 17:41:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 17:41:24,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:24,458 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:24,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:24,663 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1464793713, now seen corresponding path program 13 times [2019-10-13 17:41:24,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:24,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662168112] [2019-10-13 17:41:24,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:24,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:24,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:24,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662168112] [2019-10-13 17:41:24,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932906009] [2019-10-13 17:41:24,832 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 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 17:41:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:41:24,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:24,918 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:24,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:41:24,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402544340] [2019-10-13 17:41:24,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:41:24,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:24,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:41:24,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:41:24,920 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-10-13 17:41:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:25,038 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-10-13 17:41:25,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:41:25,038 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-10-13 17:41:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:25,039 INFO L225 Difference]: With dead ends: 108 [2019-10-13 17:41:25,039 INFO L226 Difference]: Without dead ends: 72 [2019-10-13 17:41:25,040 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 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 17:41:25,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-13 17:41:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-13 17:41:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-13 17:41:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-10-13 17:41:25,045 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-10-13 17:41:25,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:25,046 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-10-13 17:41:25,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:41:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-10-13 17:41:25,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-13 17:41:25,047 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:25,047 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:25,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:25,248 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:25,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:25,249 INFO L82 PathProgramCache]: Analyzing trace with hash -238635693, now seen corresponding path program 14 times [2019-10-13 17:41:25,249 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:25,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11520260] [2019-10-13 17:41:25,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,250 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:25,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11520260] [2019-10-13 17:41:25,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598114462] [2019-10-13 17:41:25,478 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 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 [2019-10-13 17:41:25,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:25,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:25,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:41:25,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:25,607 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:25,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:41:25,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160471635] [2019-10-13 17:41:25,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:41:25,609 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:25,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:41:25,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:41:25,610 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-10-13 17:41:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:25,738 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-10-13 17:41:25,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:41:25,738 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-10-13 17:41:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:25,739 INFO L225 Difference]: With dead ends: 110 [2019-10-13 17:41:25,739 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:41:25,740 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 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 17:41:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:41:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-13 17:41:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:41:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-13 17:41:25,745 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-10-13 17:41:25,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:25,745 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-13 17:41:25,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:41:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-13 17:41:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 17:41:25,746 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:25,747 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:25,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:25,950 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:25,951 INFO L82 PathProgramCache]: Analyzing trace with hash -851755083, now seen corresponding path program 15 times [2019-10-13 17:41:25,951 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:25,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327665257] [2019-10-13 17:41:25,952 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,952 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:26,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327665257] [2019-10-13 17:41:26,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177867770] [2019-10-13 17:41:26,148 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:26,223 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:41:26,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:26,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:41:26,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-10-13 17:41:26,313 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:26,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-13 17:41:26,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387792251] [2019-10-13 17:41:26,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:41:26,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:26,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:41:26,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:26,315 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-10-13 17:41:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:26,567 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-10-13 17:41:26,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:41:26,568 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-10-13 17:41:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:26,568 INFO L225 Difference]: With dead ends: 115 [2019-10-13 17:41:26,568 INFO L226 Difference]: Without dead ends: 79 [2019-10-13 17:41:26,569 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-13 17:41:26,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-13 17:41:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 17:41:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-10-13 17:41:26,572 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-10-13 17:41:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:26,572 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-10-13 17:41:26,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:41:26,573 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-10-13 17:41:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 17:41:26,573 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:26,573 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:26,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:26,774 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:26,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:26,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1460436501, now seen corresponding path program 16 times [2019-10-13 17:41:26,775 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:26,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33009776] [2019-10-13 17:41:26,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:26,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:26,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 17:41:27,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33009776] [2019-10-13 17:41:27,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020491435] [2019-10-13 17:41:27,008 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:27,085 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:27,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:27,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:41:27,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 17:41:27,114 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:27,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:41:27,115 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985469183] [2019-10-13 17:41:27,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:41:27,115 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:27,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:41:27,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:41:27,116 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-10-13 17:41:27,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:27,322 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-10-13 17:41:27,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:41:27,323 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-10-13 17:41:27,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:27,324 INFO L225 Difference]: With dead ends: 118 [2019-10-13 17:41:27,324 INFO L226 Difference]: Without dead ends: 80 [2019-10-13 17:41:27,325 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 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 17:41:27,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-13 17:41:27,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-13 17:41:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-13 17:41:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-10-13 17:41:27,331 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-10-13 17:41:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:27,331 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-10-13 17:41:27,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:41:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-10-13 17:41:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 17:41:27,333 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:27,333 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:27,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:27,539 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:27,540 INFO L82 PathProgramCache]: Analyzing trace with hash 664024823, now seen corresponding path program 17 times [2019-10-13 17:41:27,540 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:27,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123098230] [2019-10-13 17:41:27,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:27,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:27,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 17:41:27,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123098230] [2019-10-13 17:41:27,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885428619] [2019-10-13 17:41:27,950 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:29,254 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-13 17:41:29,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:29,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:41:29,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-10-13 17:41:29,374 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:29,374 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-10-13 17:41:29,374 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396038535] [2019-10-13 17:41:29,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:41:29,375 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:29,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:41:29,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:41:29,376 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-10-13 17:41:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:29,717 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-10-13 17:41:29,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-13 17:41:29,717 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-10-13 17:41:29,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:29,718 INFO L225 Difference]: With dead ends: 123 [2019-10-13 17:41:29,718 INFO L226 Difference]: Without dead ends: 85 [2019-10-13 17:41:29,719 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 17:41:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-13 17:41:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-10-13 17:41:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-13 17:41:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-13 17:41:29,723 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-10-13 17:41:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:29,724 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-13 17:41:29,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:41:29,724 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-13 17:41:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 17:41:29,725 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:29,725 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:29,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:29,935 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:29,936 INFO L82 PathProgramCache]: Analyzing trace with hash -683189417, now seen corresponding path program 18 times [2019-10-13 17:41:29,936 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:29,936 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485548707] [2019-10-13 17:41:29,936 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:29,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:29,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-10-13 17:41:30,177 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485548707] [2019-10-13 17:41:30,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407790324] [2019-10-13 17:41:30,178 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:30,853 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 17:41:30,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:30,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:41:30,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 269 proven. 25 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-13 17:41:31,083 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:31,083 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2019-10-13 17:41:31,083 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981638873] [2019-10-13 17:41:31,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:41:31,084 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:31,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:41:31,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:41:31,085 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 30 states. [2019-10-13 17:41:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:31,493 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2019-10-13 17:41:31,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:41:31,496 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2019-10-13 17:41:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:31,497 INFO L225 Difference]: With dead ends: 130 [2019-10-13 17:41:31,497 INFO L226 Difference]: Without dead ends: 90 [2019-10-13 17:41:31,499 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=336, Invalid=924, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:41:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-13 17:41:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-13 17:41:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-13 17:41:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-10-13 17:41:31,509 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 120 [2019-10-13 17:41:31,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:31,510 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-10-13 17:41:31,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:41:31,510 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-10-13 17:41:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 17:41:31,511 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:31,511 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:31,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:31,717 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:31,717 INFO L82 PathProgramCache]: Analyzing trace with hash -258630887, now seen corresponding path program 19 times [2019-10-13 17:41:31,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:31,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077573331] [2019-10-13 17:41:31,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:31,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:31,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:32,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077573331] [2019-10-13 17:41:32,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977423260] [2019-10-13 17:41:32,032 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:41:32,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:32,161 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:32,161 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-13 17:41:32,161 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080133248] [2019-10-13 17:41:32,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:41:32,162 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:32,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:41:32,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:41:32,163 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-10-13 17:41:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:32,265 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-10-13 17:41:32,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:41:32,266 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-13 17:41:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:32,267 INFO L225 Difference]: With dead ends: 134 [2019-10-13 17:41:32,267 INFO L226 Difference]: Without dead ends: 92 [2019-10-13 17:41:32,267 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:41:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-13 17:41:32,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-13 17:41:32,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-13 17:41:32,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-10-13 17:41:32,272 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-10-13 17:41:32,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:32,272 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-10-13 17:41:32,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:41:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-10-13 17:41:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 17:41:32,274 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:32,274 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:32,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:32,475 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:32,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:32,475 INFO L82 PathProgramCache]: Analyzing trace with hash 547573755, now seen corresponding path program 20 times [2019-10-13 17:41:32,476 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:32,476 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622853973] [2019-10-13 17:41:32,477 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:32,477 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:32,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:32,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622853973] [2019-10-13 17:41:32,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670441169] [2019-10-13 17:41:32,849 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:32,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:32,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:32,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 17:41:32,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:33,019 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:33,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-10-13 17:41:33,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139513581] [2019-10-13 17:41:33,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 17:41:33,020 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 17:41:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:41:33,021 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 26 states. [2019-10-13 17:41:33,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:33,227 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2019-10-13 17:41:33,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:41:33,228 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 128 [2019-10-13 17:41:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:33,229 INFO L225 Difference]: With dead ends: 136 [2019-10-13 17:41:33,229 INFO L226 Difference]: Without dead ends: 94 [2019-10-13 17:41:33,230 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:41:33,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-13 17:41:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-13 17:41:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-13 17:41:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-10-13 17:41:33,234 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 128 [2019-10-13 17:41:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:33,235 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-10-13 17:41:33,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 17:41:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-10-13 17:41:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 17:41:33,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:33,236 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:33,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:33,440 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:33,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:33,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2078845859, now seen corresponding path program 21 times [2019-10-13 17:41:33,441 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:33,441 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100367308] [2019-10-13 17:41:33,441 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:33,441 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:33,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:33,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100367308] [2019-10-13 17:41:33,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137296579] [2019-10-13 17:41:33,788 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:33,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-13 17:41:33,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:33,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:41:33,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2019-10-13 17:41:34,057 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:34,057 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2019-10-13 17:41:34,057 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959320192] [2019-10-13 17:41:34,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 17:41:34,058 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:34,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 17:41:34,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:41:34,059 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 33 states. [2019-10-13 17:41:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:34,389 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2019-10-13 17:41:34,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-13 17:41:34,390 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 130 [2019-10-13 17:41:34,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:34,392 INFO L225 Difference]: With dead ends: 141 [2019-10-13 17:41:34,392 INFO L226 Difference]: Without dead ends: 99 [2019-10-13 17:41:34,393 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:41:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-13 17:41:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-10-13 17:41:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-13 17:41:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-10-13 17:41:34,400 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 130 [2019-10-13 17:41:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:34,400 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-10-13 17:41:34,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 17:41:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-10-13 17:41:34,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 17:41:34,401 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:34,402 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:34,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:34,607 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:34,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1781960003, now seen corresponding path program 22 times [2019-10-13 17:41:34,608 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:34,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47248560] [2019-10-13 17:41:34,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:34,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:34,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 17:41:35,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47248560] [2019-10-13 17:41:35,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687629220] [2019-10-13 17:41:35,022 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:35,117 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:35,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:35,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 17:41:35,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 17:41:35,149 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:35,149 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-13 17:41:35,150 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719372774] [2019-10-13 17:41:35,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:41:35,151 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:35,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:41:35,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:41:35,152 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 28 states. [2019-10-13 17:41:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:35,360 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-10-13 17:41:35,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:41:35,360 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 134 [2019-10-13 17:41:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:35,361 INFO L225 Difference]: With dead ends: 144 [2019-10-13 17:41:35,362 INFO L226 Difference]: Without dead ends: 100 [2019-10-13 17:41:35,363 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:41:35,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-13 17:41:35,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-10-13 17:41:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-13 17:41:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2019-10-13 17:41:35,370 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 134 [2019-10-13 17:41:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:35,370 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2019-10-13 17:41:35,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:41:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2019-10-13 17:41:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 17:41:35,371 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:35,371 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:35,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:35,575 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:35,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1800218015, now seen corresponding path program 23 times [2019-10-13 17:41:35,576 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:35,576 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227840975] [2019-10-13 17:41:35,576 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:35,577 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:35,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 17:41:35,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227840975] [2019-10-13 17:41:35,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415881244] [2019-10-13 17:41:35,927 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:37,994 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-13 17:41:37,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:37,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:41:38,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2019-10-13 17:41:38,224 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:38,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-10-13 17:41:38,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001546960] [2019-10-13 17:41:38,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 17:41:38,225 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:38,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 17:41:38,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:41:38,226 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 36 states. [2019-10-13 17:41:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:38,788 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2019-10-13 17:41:38,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 17:41:38,789 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 136 [2019-10-13 17:41:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:38,790 INFO L225 Difference]: With dead ends: 149 [2019-10-13 17:41:38,790 INFO L226 Difference]: Without dead ends: 105 [2019-10-13 17:41:38,791 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2019-10-13 17:41:38,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-13 17:41:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-10-13 17:41:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-13 17:41:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2019-10-13 17:41:38,799 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 136 [2019-10-13 17:41:38,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:38,800 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2019-10-13 17:41:38,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 17:41:38,800 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2019-10-13 17:41:38,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 17:41:38,804 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:38,804 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:39,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:39,011 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:39,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:39,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1521279999, now seen corresponding path program 24 times [2019-10-13 17:41:39,011 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:39,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632897025] [2019-10-13 17:41:39,011 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:39,011 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:39,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-10-13 17:41:39,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632897025] [2019-10-13 17:41:39,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312901086] [2019-10-13 17:41:39,387 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:39,945 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-13 17:41:39,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:39,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:41:39,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 953 trivial. 0 not checked. [2019-10-13 17:41:40,126 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:40,126 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2019-10-13 17:41:40,126 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189565426] [2019-10-13 17:41:40,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-13 17:41:40,127 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:40,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-13 17:41:40,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 17:41:40,128 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 38 states. [2019-10-13 17:41:40,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:40,673 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2019-10-13 17:41:40,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-13 17:41:40,673 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 144 [2019-10-13 17:41:40,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:40,674 INFO L225 Difference]: With dead ends: 155 [2019-10-13 17:41:40,674 INFO L226 Difference]: Without dead ends: 109 [2019-10-13 17:41:40,675 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=542, Invalid=1620, Unknown=0, NotChecked=0, Total=2162 [2019-10-13 17:41:40,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-13 17:41:40,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-10-13 17:41:40,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-13 17:41:40,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-10-13 17:41:40,680 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 144 [2019-10-13 17:41:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:40,680 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-10-13 17:41:40,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-13 17:41:40,681 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-10-13 17:41:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 17:41:40,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:40,682 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:40,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:40,887 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:40,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:40,887 INFO L82 PathProgramCache]: Analyzing trace with hash -910092193, now seen corresponding path program 25 times [2019-10-13 17:41:40,887 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:40,888 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102755113] [2019-10-13 17:41:40,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:40,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:40,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:41,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102755113] [2019-10-13 17:41:41,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725204100] [2019-10-13 17:41:41,484 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:41,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 17:41:41,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:41,658 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:41,659 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-13 17:41:41,659 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298926544] [2019-10-13 17:41:41,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 17:41:41,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:41,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 17:41:41,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:41:41,660 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-10-13 17:41:41,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:41,865 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-10-13 17:41:41,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:41:41,866 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 152 [2019-10-13 17:41:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:41,867 INFO L225 Difference]: With dead ends: 158 [2019-10-13 17:41:41,867 INFO L226 Difference]: Without dead ends: 110 [2019-10-13 17:41:41,867 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:41:41,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-13 17:41:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-10-13 17:41:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-13 17:41:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-10-13 17:41:41,874 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 152 [2019-10-13 17:41:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:41,874 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-10-13 17:41:41,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 17:41:41,874 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-10-13 17:41:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 17:41:41,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:41,875 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:42,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:42,079 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:42,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1827051201, now seen corresponding path program 26 times [2019-10-13 17:41:42,080 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:42,080 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981199413] [2019-10-13 17:41:42,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:42,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:42,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:42,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981199413] [2019-10-13 17:41:42,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375157234] [2019-10-13 17:41:42,569 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:42,719 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:42,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:42,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 17:41:42,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:42,780 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:42,781 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-10-13 17:41:42,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973676028] [2019-10-13 17:41:42,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 17:41:42,782 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:42,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 17:41:42,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:41:42,783 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 32 states. [2019-10-13 17:41:43,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:43,128 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2019-10-13 17:41:43,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 17:41:43,129 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 154 [2019-10-13 17:41:43,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:43,130 INFO L225 Difference]: With dead ends: 160 [2019-10-13 17:41:43,130 INFO L226 Difference]: Without dead ends: 112 [2019-10-13 17:41:43,131 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:41:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-13 17:41:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2019-10-13 17:41:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-13 17:41:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2019-10-13 17:41:43,137 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 154 [2019-10-13 17:41:43,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:43,138 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2019-10-13 17:41:43,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-13 17:41:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2019-10-13 17:41:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 17:41:43,140 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:43,140 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:43,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:43,344 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:43,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:43,345 INFO L82 PathProgramCache]: Analyzing trace with hash -593099613, now seen corresponding path program 27 times [2019-10-13 17:41:43,345 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:43,345 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423874242] [2019-10-13 17:41:43,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:43,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:43,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:43,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423874242] [2019-10-13 17:41:43,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93215296] [2019-10-13 17:41:43,837 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:43,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 17:41:43,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:43,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:41:43,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 370 proven. 49 refuted. 0 times theorem prover too weak. 1212 trivial. 0 not checked. [2019-10-13 17:41:44,194 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:44,195 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 40 [2019-10-13 17:41:44,195 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520972214] [2019-10-13 17:41:44,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-13 17:41:44,196 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:44,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-13 17:41:44,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 17:41:44,197 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 40 states. [2019-10-13 17:41:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:44,573 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2019-10-13 17:41:44,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-13 17:41:44,574 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 156 [2019-10-13 17:41:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:44,575 INFO L225 Difference]: With dead ends: 165 [2019-10-13 17:41:44,576 INFO L226 Difference]: Without dead ends: 117 [2019-10-13 17:41:44,577 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 17:41:44,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-13 17:41:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2019-10-13 17:41:44,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-13 17:41:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2019-10-13 17:41:44,583 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 156 [2019-10-13 17:41:44,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:44,583 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2019-10-13 17:41:44,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-13 17:41:44,583 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2019-10-13 17:41:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 17:41:44,584 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:44,584 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:44,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:44,788 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:44,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1573539069, now seen corresponding path program 28 times [2019-10-13 17:41:44,789 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:44,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662447907] [2019-10-13 17:41:44,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:44,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:44,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-10-13 17:41:45,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662447907] [2019-10-13 17:41:45,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773620711] [2019-10-13 17:41:45,295 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:45,409 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:45,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:45,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:41:45,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2019-10-13 17:41:45,655 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:45,655 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-10-13 17:41:45,655 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047510510] [2019-10-13 17:41:45,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-13 17:41:45,656 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:45,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-13 17:41:45,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=1243, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 17:41:45,657 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 43 states. [2019-10-13 17:41:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:46,203 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2019-10-13 17:41:46,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-13 17:41:46,203 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 160 [2019-10-13 17:41:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:46,204 INFO L225 Difference]: With dead ends: 171 [2019-10-13 17:41:46,205 INFO L226 Difference]: Without dead ends: 121 [2019-10-13 17:41:46,209 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2019-10-13 17:41:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-13 17:41:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2019-10-13 17:41:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-13 17:41:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2019-10-13 17:41:46,218 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 160 [2019-10-13 17:41:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:46,218 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2019-10-13 17:41:46,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-13 17:41:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2019-10-13 17:41:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 17:41:46,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:46,220 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:46,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:46,424 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:46,424 INFO L82 PathProgramCache]: Analyzing trace with hash -451694749, now seen corresponding path program 29 times [2019-10-13 17:41:46,425 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:46,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071485200] [2019-10-13 17:41:46,425 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:46,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:46,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-10-13 17:41:46,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071485200] [2019-10-13 17:41:46,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588719344] [2019-10-13 17:41:46,903 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true