java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:42:38,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:42:38,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:42:38,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:42:38,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:42:38,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:42:38,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:42:38,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:42:38,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:42:38,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:42:38,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:42:38,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:42:38,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:42:38,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:42:38,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:42:38,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:42:38,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:42:38,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:42:38,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:42:38,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:42:38,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:42:38,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:42:38,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:42:38,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:42:38,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:42:38,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:42:38,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:42:38,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:42:38,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:42:38,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:42:38,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:42:38,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:42:38,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:42:38,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:42:38,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:42:38,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:42:38,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:42:38,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:42:38,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:42:38,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:42:38,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:42:38,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:42:38,791 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:42:38,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:42:38,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:42:38,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:42:38,793 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:42:38,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:42:38,796 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:42:38,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:42:38,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:42:38,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:42:38,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:42:38,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:42:38,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:42:38,798 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:42:38,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:42:38,798 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:42:38,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:42:38,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:42:38,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:42:38,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:42:38,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:42:38,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:38,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:42:38,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:42:38,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:42:38,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:42:38,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:42:38,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:42:38,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:42:39,073 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:42:39,087 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:42:39,092 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:42:39,093 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:42:39,094 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:42:39,094 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-10-14 21:42:39,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7928f3fe4/9808b643259f4d1baf1f140fe04d59ef/FLAGef52b8e6a [2019-10-14 21:42:39,628 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:42:39,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-10-14 21:42:39,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7928f3fe4/9808b643259f4d1baf1f140fe04d59ef/FLAGef52b8e6a [2019-10-14 21:42:39,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7928f3fe4/9808b643259f4d1baf1f140fe04d59ef [2019-10-14 21:42:39,997 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:42:39,999 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:42:40,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:40,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:42:40,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:42:40,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:39" (1/1) ... [2019-10-14 21:42:40,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f916025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40, skipping insertion in model container [2019-10-14 21:42:40,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:39" (1/1) ... [2019-10-14 21:42:40,014 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:42:40,030 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:42:40,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:40,239 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:42:40,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:40,291 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:42:40,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40 WrapperNode [2019-10-14 21:42:40,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:40,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:42:40,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:42:40,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:42:40,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:42:40,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:42:40,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:42:40,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:42:40,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:40,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:42:40,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:42:40,495 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:42:40,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:42:40,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:42:40,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:42:40,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:42:40,496 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:42:40,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:42:40,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:42:40,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:42:40,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:42:40,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:42:40,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:42:40,789 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:42:40,789 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 21:42:40,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:40 BoogieIcfgContainer [2019-10-14 21:42:40,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:42:40,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:42:40,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:42:40,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:42:40,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:42:39" (1/3) ... [2019-10-14 21:42:40,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e296877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:40, skipping insertion in model container [2019-10-14 21:42:40,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (2/3) ... [2019-10-14 21:42:40,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e296877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:40, skipping insertion in model container [2019-10-14 21:42:40,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:40" (3/3) ... [2019-10-14 21:42:40,800 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2019-10-14 21:42:40,808 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:42:40,815 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:42:40,826 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:42:40,850 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:42:40,851 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:42:40,851 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:42:40,851 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:42:40,851 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:42:40,851 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:42:40,852 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:42:40,852 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:42:40,868 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 21:42:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:42:40,873 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:40,874 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:40,875 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:40,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:40,880 INFO L82 PathProgramCache]: Analyzing trace with hash -526773211, now seen corresponding path program 1 times [2019-10-14 21:42:40,888 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:40,889 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020129223] [2019-10-14 21:42:40,889 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,889 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:41,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020129223] [2019-10-14 21:42:41,045 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:41,045 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:42:41,046 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440981902] [2019-10-14 21:42:41,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:42:41,050 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:42:41,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:41,067 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 21:42:41,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,173 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2019-10-14 21:42:41,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:42:41,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:42:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,183 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:42:41,183 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:42:41,186 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:42:41,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 21:42:41,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:42:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-14 21:42:41,223 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-10-14 21:42:41,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,223 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-14 21:42:41,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:42:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-14 21:42:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:42:41,224 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,225 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:41,225 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash -777624222, now seen corresponding path program 1 times [2019-10-14 21:42:41,226 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79459744] [2019-10-14 21:42:41,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:41,321 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79459744] [2019-10-14 21:42:41,321 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:41,321 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:41,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846028447] [2019-10-14 21:42:41,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:41,324 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:41,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:41,325 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2019-10-14 21:42:41,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,406 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-14 21:42:41,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:41,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:42:41,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,408 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:42:41,408 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:42:41,409 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:42:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 21:42:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:42:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-14 21:42:41,417 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2019-10-14 21:42:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,418 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-14 21:42:41,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:41,418 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-14 21:42:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:42:41,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,419 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:41,420 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2101592964, now seen corresponding path program 1 times [2019-10-14 21:42:41,421 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,421 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633457572] [2019-10-14 21:42:41,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:41,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633457572] [2019-10-14 21:42:41,502 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:41,502 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:42:41,503 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521775601] [2019-10-14 21:42:41,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:42:41,503 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:42:41,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:42:41,504 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2019-10-14 21:42:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,613 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-10-14 21:42:41,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:42:41,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-14 21:42:41,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,615 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:42:41,615 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:42:41,616 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:42:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:42:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-10-14 21:42:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:42:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 21:42:41,622 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2019-10-14 21:42:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,623 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 21:42:41,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:42:41,623 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 21:42:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:42:41,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,625 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:41,625 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1818591568, now seen corresponding path program 1 times [2019-10-14 21:42:41,626 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,626 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839289966] [2019-10-14 21:42:41,626 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,626 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:41,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839289966] [2019-10-14 21:42:41,717 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:41,717 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:42:41,718 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679277884] [2019-10-14 21:42:41,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:42:41,719 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:42:41,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:42:41,719 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2019-10-14 21:42:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,910 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-10-14 21:42:41,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:42:41,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-10-14 21:42:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,913 INFO L225 Difference]: With dead ends: 62 [2019-10-14 21:42:41,913 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:42:41,913 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:42:41,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-10-14 21:42:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:42:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-10-14 21:42:41,925 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2019-10-14 21:42:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,926 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-10-14 21:42:41,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:42:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-14 21:42:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:42:41,927 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,927 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:41,928 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,928 INFO L82 PathProgramCache]: Analyzing trace with hash 334453631, now seen corresponding path program 1 times [2019-10-14 21:42:41,928 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,929 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139779406] [2019-10-14 21:42:41,929 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,929 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:42:42,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139779406] [2019-10-14 21:42:42,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88408401] [2019-10-14 21:42:42,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:42:42,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:42:42,183 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:42,183 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:42:42,184 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56249173] [2019-10-14 21:42:42,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:42:42,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:42,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:42:42,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:42:42,185 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 11 states. [2019-10-14 21:42:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:42,502 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2019-10-14 21:42:42,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:42:42,503 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-10-14 21:42:42,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:42,507 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:42:42,508 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:42:42,509 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:42:42,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2019-10-14 21:42:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:42:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-10-14 21:42:42,525 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 26 [2019-10-14 21:42:42,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:42,525 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-10-14 21:42:42,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:42:42,526 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-10-14 21:42:42,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:42:42,527 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:42,527 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:42,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,735 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:42,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1076752728, now seen corresponding path program 2 times [2019-10-14 21:42:42,735 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:42,735 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531711997] [2019-10-14 21:42:42,736 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,736 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:42:42,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531711997] [2019-10-14 21:42:42,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544837048] [2019-10-14 21:42:42,939 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,991 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:42,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:42,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:42:42,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:42:43,042 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:43,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 13 [2019-10-14 21:42:43,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187804150] [2019-10-14 21:42:43,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:42:43,043 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:43,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:42:43,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:43,050 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 13 states. [2019-10-14 21:42:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:43,528 INFO L93 Difference]: Finished difference Result 145 states and 198 transitions. [2019-10-14 21:42:43,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:42:43,529 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2019-10-14 21:42:43,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:43,531 INFO L225 Difference]: With dead ends: 145 [2019-10-14 21:42:43,531 INFO L226 Difference]: Without dead ends: 116 [2019-10-14 21:42:43,532 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:42:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-14 21:42:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 63. [2019-10-14 21:42:43,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 21:42:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2019-10-14 21:42:43,547 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 34 [2019-10-14 21:42:43,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:43,547 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2019-10-14 21:42:43,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:42:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2019-10-14 21:42:43,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:42:43,549 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:43,549 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:43,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:43,753 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:43,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:43,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1104086922, now seen corresponding path program 1 times [2019-10-14 21:42:43,754 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:43,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801645234] [2019-10-14 21:42:43,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:42:43,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801645234] [2019-10-14 21:42:43,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919835911] [2019-10-14 21:42:43,855 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 [2019-10-14 21:42:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:43,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:42:43,985 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:43,985 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-10-14 21:42:43,985 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621982972] [2019-10-14 21:42:43,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:42:43,986 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:43,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:42:43,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:43,987 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand 13 states. [2019-10-14 21:42:44,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:44,297 INFO L93 Difference]: Finished difference Result 178 states and 250 transitions. [2019-10-14 21:42:44,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:42:44,298 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2019-10-14 21:42:44,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:44,299 INFO L225 Difference]: With dead ends: 178 [2019-10-14 21:42:44,299 INFO L226 Difference]: Without dead ends: 130 [2019-10-14 21:42:44,300 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:44,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-14 21:42:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 51. [2019-10-14 21:42:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:42:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-10-14 21:42:44,309 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 36 [2019-10-14 21:42:44,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:44,309 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-10-14 21:42:44,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:42:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-10-14 21:42:44,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:42:44,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:44,311 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:44,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:44,515 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:44,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:44,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1653847887, now seen corresponding path program 3 times [2019-10-14 21:42:44,516 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:44,517 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632242276] [2019-10-14 21:42:44,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:42:44,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632242276] [2019-10-14 21:42:44,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951495456] [2019-10-14 21:42:44,694 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:44,752 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:42:44,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:44,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:42:44,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:44,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 21:42:44,824 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:44,824 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 14 [2019-10-14 21:42:44,825 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511417906] [2019-10-14 21:42:44,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:42:44,825 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:44,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:42:44,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:44,826 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 14 states. [2019-10-14 21:42:45,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:45,304 INFO L93 Difference]: Finished difference Result 160 states and 221 transitions. [2019-10-14 21:42:45,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:42:45,304 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2019-10-14 21:42:45,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:45,306 INFO L225 Difference]: With dead ends: 160 [2019-10-14 21:42:45,306 INFO L226 Difference]: Without dead ends: 147 [2019-10-14 21:42:45,307 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:42:45,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-10-14 21:42:45,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 85. [2019-10-14 21:42:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-14 21:42:45,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2019-10-14 21:42:45,321 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 41 [2019-10-14 21:42:45,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:45,321 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2019-10-14 21:42:45,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:42:45,322 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2019-10-14 21:42:45,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 21:42:45,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:45,323 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:45,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,535 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:45,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:45,535 INFO L82 PathProgramCache]: Analyzing trace with hash -510083147, now seen corresponding path program 1 times [2019-10-14 21:42:45,536 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:45,536 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753795930] [2019-10-14 21:42:45,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:42:45,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753795930] [2019-10-14 21:42:45,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847033610] [2019-10-14 21:42:45,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:42:45,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 21:42:45,764 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:45,764 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2019-10-14 21:42:45,764 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33905012] [2019-10-14 21:42:45,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:42:45,765 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:45,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:42:45,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:45,766 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand 13 states. [2019-10-14 21:42:46,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:46,130 INFO L93 Difference]: Finished difference Result 366 states and 536 transitions. [2019-10-14 21:42:46,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:42:46,130 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2019-10-14 21:42:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:46,132 INFO L225 Difference]: With dead ends: 366 [2019-10-14 21:42:46,132 INFO L226 Difference]: Without dead ends: 298 [2019-10-14 21:42:46,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-10-14 21:42:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 93. [2019-10-14 21:42:46,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-14 21:42:46,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 128 transitions. [2019-10-14 21:42:46,150 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 128 transitions. Word has length 44 [2019-10-14 21:42:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:46,150 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 128 transitions. [2019-10-14 21:42:46,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:42:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 128 transitions. [2019-10-14 21:42:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 21:42:46,152 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:46,152 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:46,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,357 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:46,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:46,357 INFO L82 PathProgramCache]: Analyzing trace with hash -396829064, now seen corresponding path program 2 times [2019-10-14 21:42:46,357 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:46,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655976891] [2019-10-14 21:42:46,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:42:46,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655976891] [2019-10-14 21:42:46,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634519907] [2019-10-14 21:42:46,500 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,580 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:46,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:46,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:46,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-14 21:42:46,672 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:46,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2019-10-14 21:42:46,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146684029] [2019-10-14 21:42:46,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:42:46,677 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:46,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:42:46,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:46,677 INFO L87 Difference]: Start difference. First operand 93 states and 128 transitions. Second operand 18 states. [2019-10-14 21:42:47,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:47,731 INFO L93 Difference]: Finished difference Result 454 states and 670 transitions. [2019-10-14 21:42:47,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-10-14 21:42:47,732 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2019-10-14 21:42:47,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:47,734 INFO L225 Difference]: With dead ends: 454 [2019-10-14 21:42:47,734 INFO L226 Difference]: Without dead ends: 269 [2019-10-14 21:42:47,740 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=718, Invalid=2144, Unknown=0, NotChecked=0, Total=2862 [2019-10-14 21:42:47,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-10-14 21:42:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 105. [2019-10-14 21:42:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 21:42:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2019-10-14 21:42:47,761 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 49 [2019-10-14 21:42:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:47,761 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2019-10-14 21:42:47,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:42:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2019-10-14 21:42:47,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:42:47,767 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:47,767 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:47,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,972 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash -611115395, now seen corresponding path program 4 times [2019-10-14 21:42:47,973 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:47,974 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141471624] [2019-10-14 21:42:47,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-14 21:42:48,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141471624] [2019-10-14 21:42:48,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262093767] [2019-10-14 21:42:48,097 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 [2019-10-14 21:42:48,163 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:48,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:48,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:42:48,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-10-14 21:42:48,275 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:48,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-10-14 21:42:48,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279017691] [2019-10-14 21:42:48,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:42:48,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:48,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:42:48,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:48,278 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand 19 states. [2019-10-14 21:42:49,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:49,269 INFO L93 Difference]: Finished difference Result 350 states and 472 transitions. [2019-10-14 21:42:49,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:42:49,269 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2019-10-14 21:42:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:49,271 INFO L225 Difference]: With dead ends: 350 [2019-10-14 21:42:49,271 INFO L226 Difference]: Without dead ends: 266 [2019-10-14 21:42:49,273 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=736, Invalid=1814, Unknown=0, NotChecked=0, Total=2550 [2019-10-14 21:42:49,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-10-14 21:42:49,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 114. [2019-10-14 21:42:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-14 21:42:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2019-10-14 21:42:49,287 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 63 [2019-10-14 21:42:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:49,288 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2019-10-14 21:42:49,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:42:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2019-10-14 21:42:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 21:42:49,289 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:49,289 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:49,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,500 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:49,500 INFO L82 PathProgramCache]: Analyzing trace with hash 215199622, now seen corresponding path program 5 times [2019-10-14 21:42:49,500 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:49,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376183344] [2019-10-14 21:42:49,501 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,501 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 119 proven. 507 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-14 21:42:49,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376183344] [2019-10-14 21:42:49,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291759087] [2019-10-14 21:42:49,968 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 [2019-10-14 21:42:50,026 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 21:42:50,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:50,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:42:50,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:50,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 436 proven. 55 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2019-10-14 21:42:50,210 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:50,211 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 38 [2019-10-14 21:42:50,211 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829101318] [2019-10-14 21:42:50,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 21:42:50,212 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:50,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 21:42:50,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:42:50,213 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand 38 states. [2019-10-14 21:42:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:54,207 INFO L93 Difference]: Finished difference Result 513 states and 733 transitions. [2019-10-14 21:42:54,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-10-14 21:42:54,207 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2019-10-14 21:42:54,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:54,212 INFO L225 Difference]: With dead ends: 513 [2019-10-14 21:42:54,212 INFO L226 Difference]: Without dead ends: 419 [2019-10-14 21:42:54,216 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3226 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2559, Invalid=10781, Unknown=0, NotChecked=0, Total=13340 [2019-10-14 21:42:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-10-14 21:42:54,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 205. [2019-10-14 21:42:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-10-14 21:42:54,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 263 transitions. [2019-10-14 21:42:54,238 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 263 transitions. Word has length 107 [2019-10-14 21:42:54,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:54,239 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 263 transitions. [2019-10-14 21:42:54,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 21:42:54,239 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 263 transitions. [2019-10-14 21:42:54,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-14 21:42:54,240 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:54,240 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 28, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:54,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:54,441 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:54,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:54,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1872470850, now seen corresponding path program 6 times [2019-10-14 21:42:54,442 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:54,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898374764] [2019-10-14 21:42:54,442 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:54,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:54,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 20 proven. 1198 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-10-14 21:42:54,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898374764] [2019-10-14 21:42:54,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666399063] [2019-10-14 21:42:54,792 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 [2019-10-14 21:42:54,961 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-10-14 21:42:54,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:54,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:54,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:55,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 0 proven. 1204 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-14 21:42:55,071 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:55,072 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 19 [2019-10-14 21:42:55,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46582126] [2019-10-14 21:42:55,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:42:55,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:55,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:42:55,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:55,075 INFO L87 Difference]: Start difference. First operand 205 states and 263 transitions. Second operand 19 states. [2019-10-14 21:42:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:56,034 INFO L93 Difference]: Finished difference Result 331 states and 424 transitions. [2019-10-14 21:42:56,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-14 21:42:56,034 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 137 [2019-10-14 21:42:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:56,036 INFO L225 Difference]: With dead ends: 331 [2019-10-14 21:42:56,037 INFO L226 Difference]: Without dead ends: 318 [2019-10-14 21:42:56,038 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=654, Invalid=1896, Unknown=0, NotChecked=0, Total=2550 [2019-10-14 21:42:56,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-10-14 21:42:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 229. [2019-10-14 21:42:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-10-14 21:42:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 295 transitions. [2019-10-14 21:42:56,061 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 295 transitions. Word has length 137 [2019-10-14 21:42:56,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:56,062 INFO L462 AbstractCegarLoop]: Abstraction has 229 states and 295 transitions. [2019-10-14 21:42:56,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:42:56,062 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 295 transitions. [2019-10-14 21:42:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-14 21:42:56,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:56,064 INFO L380 BasicCegarLoop]: trace histogram [35, 35, 35, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:56,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:56,268 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:56,269 INFO L82 PathProgramCache]: Analyzing trace with hash 586009211, now seen corresponding path program 7 times [2019-10-14 21:42:56,269 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:56,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908028191] [2019-10-14 21:42:56,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:56,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:56,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 672 proven. 159 refuted. 0 times theorem prover too weak. 1390 trivial. 0 not checked. [2019-10-14 21:42:56,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908028191] [2019-10-14 21:42:56,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240204529] [2019-10-14 21:42:56,495 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 [2019-10-14 21:42:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:56,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2157 trivial. 0 not checked. [2019-10-14 21:42:56,781 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:56,781 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 25 [2019-10-14 21:42:56,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513836189] [2019-10-14 21:42:56,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:42:56,782 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:56,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:42:56,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:56,784 INFO L87 Difference]: Start difference. First operand 229 states and 295 transitions. Second operand 25 states. [2019-10-14 21:42:58,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:58,880 INFO L93 Difference]: Finished difference Result 487 states and 638 transitions. [2019-10-14 21:42:58,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-10-14 21:42:58,881 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 161 [2019-10-14 21:42:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:58,883 INFO L225 Difference]: With dead ends: 487 [2019-10-14 21:42:58,883 INFO L226 Difference]: Without dead ends: 281 [2019-10-14 21:42:58,886 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2106, Invalid=5034, Unknown=0, NotChecked=0, Total=7140 [2019-10-14 21:42:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-10-14 21:42:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 234. [2019-10-14 21:42:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-10-14 21:42:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2019-10-14 21:42:58,922 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 161 [2019-10-14 21:42:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:58,923 INFO L462 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2019-10-14 21:42:58,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:42:58,923 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2019-10-14 21:42:58,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 21:42:58,925 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:58,925 INFO L380 BasicCegarLoop]: trace histogram [36, 36, 36, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:59,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:59,130 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:59,131 INFO L82 PathProgramCache]: Analyzing trace with hash -635882284, now seen corresponding path program 8 times [2019-10-14 21:42:59,131 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:59,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879698878] [2019-10-14 21:42:59,132 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:59,132 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:59,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2351 backedges. 23 proven. 1975 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2019-10-14 21:42:59,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879698878] [2019-10-14 21:42:59,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568029522] [2019-10-14 21:42:59,365 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 [2019-10-14 21:42:59,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:59,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:59,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:42:59,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2351 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2270 trivial. 0 not checked. [2019-10-14 21:42:59,538 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:59,539 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 20 [2019-10-14 21:42:59,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315812816] [2019-10-14 21:42:59,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:42:59,539 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:59,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:42:59,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:42:59,540 INFO L87 Difference]: Start difference. First operand 234 states and 302 transitions. Second operand 20 states. [2019-10-14 21:43:00,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:00,790 INFO L93 Difference]: Finished difference Result 573 states and 748 transitions. [2019-10-14 21:43:00,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-14 21:43:00,790 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 166 [2019-10-14 21:43:00,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:00,792 INFO L225 Difference]: With dead ends: 573 [2019-10-14 21:43:00,792 INFO L226 Difference]: Without dead ends: 364 [2019-10-14 21:43:00,794 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=826, Invalid=2366, Unknown=0, NotChecked=0, Total=3192 [2019-10-14 21:43:00,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-10-14 21:43:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 260. [2019-10-14 21:43:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-10-14 21:43:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 336 transitions. [2019-10-14 21:43:00,818 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 336 transitions. Word has length 166 [2019-10-14 21:43:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:00,818 INFO L462 AbstractCegarLoop]: Abstraction has 260 states and 336 transitions. [2019-10-14 21:43:00,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:43:00,818 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 336 transitions. [2019-10-14 21:43:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-14 21:43:00,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:00,821 INFO L380 BasicCegarLoop]: trace histogram [43, 43, 43, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:01,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:01,025 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:01,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:01,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1028235619, now seen corresponding path program 9 times [2019-10-14 21:43:01,026 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:01,026 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157253334] [2019-10-14 21:43:01,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:01,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:01,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3313 backedges. 1115 proven. 1903 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2019-10-14 21:43:01,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157253334] [2019-10-14 21:43:01,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804708658] [2019-10-14 21:43:01,748 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 [2019-10-14 21:43:01,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-10-14 21:43:01,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:01,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:43:01,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:01,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:43:02,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:43:02,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:43:02,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:43:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3313 backedges. 964 proven. 92 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2019-10-14 21:43:02,077 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:02,077 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 14] total 41 [2019-10-14 21:43:02,077 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153624520] [2019-10-14 21:43:02,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-14 21:43:02,078 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:02,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-14 21:43:02,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 21:43:02,079 INFO L87 Difference]: Start difference. First operand 260 states and 336 transitions. Second operand 41 states.