java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/xor1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:40:56,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:40:56,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:40:56,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:40:56,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:40:56,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:40:56,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:40:56,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:40:56,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:40:56,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:40:56,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:40:56,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:40:56,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:40:56,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:40:56,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:40:56,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:40:56,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:40:56,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:40:56,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:40:56,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:40:56,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:40:56,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:40:56,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:40:56,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:40:56,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:40:56,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:40:56,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:40:56,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:40:56,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:40:56,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:40:56,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:40:56,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:40:56,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:40:56,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:40:56,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:40:56,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:40:56,957 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 21:40:56,992 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:40:56,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:40:56,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:40:56,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:40:56,998 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:40:56,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:40:56,998 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:40:56,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:40:56,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:40:56,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:40:56,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:40:56,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:40:56,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:40:56,999 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:40:56,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:40:57,000 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:40:57,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:40:57,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:40:57,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:40:57,002 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:40:57,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:40:57,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:40:57,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:40:57,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:40:57,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:40:57,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:40:57,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:40:57,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:40:57,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:40:57,278 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:40:57,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:40:57,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:40:57,301 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:40:57,301 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:40:57,302 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor1.i [2019-10-14 21:40:57,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee2e119f/dd834a20619b4213ab52b33a6826118f/FLAGe14c56d54 [2019-10-14 21:40:57,828 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:40:57,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor1.i [2019-10-14 21:40:57,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee2e119f/dd834a20619b4213ab52b33a6826118f/FLAGe14c56d54 [2019-10-14 21:40:58,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee2e119f/dd834a20619b4213ab52b33a6826118f [2019-10-14 21:40:58,236 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:40:58,237 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:40:58,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:40:58,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:40:58,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:40:58,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:58" (1/1) ... [2019-10-14 21:40:58,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db268e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:58, skipping insertion in model container [2019-10-14 21:40:58,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:58" (1/1) ... [2019-10-14 21:40:58,254 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:40:58,281 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:40:58,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:40:58,470 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:40:58,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:40:58,586 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:40:58,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:58 WrapperNode [2019-10-14 21:40:58,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:40:58,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:40:58,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:40:58,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:40:58,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:58" (1/1) ... [2019-10-14 21:40:58,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:58" (1/1) ... [2019-10-14 21:40:58,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:58" (1/1) ... [2019-10-14 21:40:58,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:58" (1/1) ... [2019-10-14 21:40:58,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:58" (1/1) ... [2019-10-14 21:40:58,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:58" (1/1) ... [2019-10-14 21:40:58,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:58" (1/1) ... [2019-10-14 21:40:58,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:40:58,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:40:58,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:40:58,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:40:58,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:58" (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 21:40:58,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:40:58,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:40:58,684 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2019-10-14 21:40:58,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:40:58,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:40:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:40:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2019-10-14 21:40:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:40:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:40:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:40:58,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:40:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:40:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:40:58,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:40:58,930 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:40:58,930 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:40:58,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:58 BoogieIcfgContainer [2019-10-14 21:40:58,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:40:58,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:40:58,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:40:58,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:40:58,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:40:58" (1/3) ... [2019-10-14 21:40:58,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3caed7c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:58, skipping insertion in model container [2019-10-14 21:40:58,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:58" (2/3) ... [2019-10-14 21:40:58,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3caed7c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:58, skipping insertion in model container [2019-10-14 21:40:58,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:58" (3/3) ... [2019-10-14 21:40:58,941 INFO L109 eAbstractionObserver]: Analyzing ICFG xor1.i [2019-10-14 21:40:58,976 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:40:58,991 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:40:59,019 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:40:59,060 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:40:59,061 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:40:59,061 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:40:59,061 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:40:59,061 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:40:59,061 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:40:59,061 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:40:59,061 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:40:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 21:40:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:40:59,085 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:59,086 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:59,087 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:59,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:59,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1461178031, now seen corresponding path program 1 times [2019-10-14 21:40:59,099 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:59,099 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882363268] [2019-10-14 21:40:59,099 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:59,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:59,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:40:59,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882363268] [2019-10-14 21:40:59,299 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:40:59,299 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:40:59,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780687744] [2019-10-14 21:40:59,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:59,305 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:59,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:59,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:40:59,326 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-14 21:40:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:59,460 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-14 21:40:59,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:59,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:40:59,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:59,477 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:40:59,478 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:40:59,485 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 21:40:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:40:59,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:40:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:40:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-14 21:40:59,550 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-10-14 21:40:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:59,553 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-14 21:40:59,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-14 21:40:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:40:59,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:59,558 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:59,559 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:59,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:59,560 INFO L82 PathProgramCache]: Analyzing trace with hash -595992629, now seen corresponding path program 1 times [2019-10-14 21:40:59,561 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:59,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736768405] [2019-10-14 21:40:59,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:59,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:59,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:40:59,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736768405] [2019-10-14 21:40:59,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410376764] [2019-10-14 21:40:59,748 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 21:40:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:59,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:40:59,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:40:59,886 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:40:59,886 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:40:59,887 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735884835] [2019-10-14 21:40:59,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:59,891 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:59,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:59,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:40:59,893 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-10-14 21:40:59,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:59,920 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-14 21:40:59,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:59,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:40:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:59,922 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:40:59,923 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:40:59,925 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:40:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:40:59,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 21:40:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:40:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 21:40:59,941 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-14 21:40:59,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:59,941 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 21:40:59,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 21:40:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:40:59,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:59,944 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:00,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:00,159 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:00,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:00,159 INFO L82 PathProgramCache]: Analyzing trace with hash 169606189, now seen corresponding path program 1 times [2019-10-14 21:41:00,160 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:00,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064491610] [2019-10-14 21:41:00,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:41:00,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064491610] [2019-10-14 21:41:00,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13571663] [2019-10-14 21:41:00,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:41:00,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:41:00,385 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:41:00,385 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 21:41:00,385 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091537001] [2019-10-14 21:41:00,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:00,386 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:00,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:00,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:00,387 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-14 21:41:00,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:00,422 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-14 21:41:00,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:00,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 21:41:00,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:00,424 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:41:00,424 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:41:00,425 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:41:00,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 21:41:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:41:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 21:41:00,432 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-10-14 21:41:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:00,432 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 21:41:00,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 21:41:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:41:00,434 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:00,434 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:00,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:00,645 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:00,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1462689141, now seen corresponding path program 1 times [2019-10-14 21:41:00,647 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:00,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215654901] [2019-10-14 21:41:00,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:00,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:41:00,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215654901] [2019-10-14 21:41:00,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060545575] [2019-10-14 21:41:00,735 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 21:41:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:00,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:41:00,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:41:00,807 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:41:00,807 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:41:00,807 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641562386] [2019-10-14 21:41:00,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:00,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:00,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:00,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:00,809 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-14 21:41:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:00,822 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-14 21:41:00,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:00,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-14 21:41:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:00,824 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:41:00,824 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:41:00,825 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:00,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:41:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 21:41:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:41:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 21:41:00,831 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-10-14 21:41:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:00,833 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 21:41:00,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 21:41:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:41:00,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:00,835 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:01,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:01,039 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash -233991671, now seen corresponding path program 1 times [2019-10-14 21:41:01,040 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:01,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907781306] [2019-10-14 21:41:01,040 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,040 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:41:01,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907781306] [2019-10-14 21:41:01,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617764150] [2019-10-14 21:41:01,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:41:01,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 21:41:01,257 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:01,258 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-10-14 21:41:01,258 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263529053] [2019-10-14 21:41:01,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:01,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:01,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:01,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:01,259 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-14 21:41:01,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:01,406 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-14 21:41:01,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:41:01,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-14 21:41:01,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:01,408 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:41:01,408 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:41:01,409 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:41:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:41:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-14 21:41:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:41:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-14 21:41:01,420 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-10-14 21:41:01,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:01,421 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-14 21:41:01,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-14 21:41:01,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:41:01,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:01,423 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:01,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:01,631 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:01,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:01,631 INFO L82 PathProgramCache]: Analyzing trace with hash -52274487, now seen corresponding path program 2 times [2019-10-14 21:41:01,632 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:01,632 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701263060] [2019-10-14 21:41:01,632 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,633 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:01,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:41:01,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701263060] [2019-10-14 21:41:01,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190355167] [2019-10-14 21:41:01,720 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:01,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:01,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:01,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:01,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:41:01,819 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:01,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:41:01,824 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129937844] [2019-10-14 21:41:01,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:41:01,825 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:01,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:41:01,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:01,826 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-14 21:41:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:01,972 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-14 21:41:01,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:01,973 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-14 21:41:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:01,974 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:41:01,974 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:41:01,977 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:41:01,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 21:41:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:41:01,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-14 21:41:01,990 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-10-14 21:41:01,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:01,990 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-14 21:41:01,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:41:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-14 21:41:01,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:41:01,992 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:01,992 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:02,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:02,197 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:02,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:02,198 INFO L82 PathProgramCache]: Analyzing trace with hash 602858155, now seen corresponding path program 3 times [2019-10-14 21:41:02,198 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:02,199 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031365862] [2019-10-14 21:41:02,200 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,200 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:41:02,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031365862] [2019-10-14 21:41:02,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394696360] [2019-10-14 21:41:02,328 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:02,390 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:41:02,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:02,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:41:02,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 21:41:02,440 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:02,440 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 21:41:02,441 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453095234] [2019-10-14 21:41:02,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:41:02,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:02,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:41:02,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:41:02,442 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-10-14 21:41:02,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:02,565 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-14 21:41:02,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:41:02,565 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-14 21:41:02,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:02,566 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:41:02,566 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:41:02,570 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:41:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:41:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-14 21:41:02,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:41:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-14 21:41:02,583 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-10-14 21:41:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:02,583 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-14 21:41:02,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:41:02,584 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-14 21:41:02,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:41:02,585 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:02,585 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:02,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:02,786 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:02,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:02,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1804278027, now seen corresponding path program 4 times [2019-10-14 21:41:02,787 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:02,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298055714] [2019-10-14 21:41:02,788 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,788 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:02,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:41:02,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298055714] [2019-10-14 21:41:02,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310548374] [2019-10-14 21:41:02,898 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 21:41:02,962 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:02,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:02,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:41:02,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:41:03,000 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:03,000 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:41:03,000 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219307774] [2019-10-14 21:41:03,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:41:03,001 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:03,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:41:03,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:41:03,002 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-10-14 21:41:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:03,098 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-14 21:41:03,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:41:03,098 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-10-14 21:41:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:03,099 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:41:03,099 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:41:03,100 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:41:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:41:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:41:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:41:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-14 21:41:03,106 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-10-14 21:41:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:03,106 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-14 21:41:03,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:41:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-14 21:41:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 21:41:03,108 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:03,108 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:03,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:03,312 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash 907456365, now seen corresponding path program 5 times [2019-10-14 21:41:03,313 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:03,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497302123] [2019-10-14 21:41:03,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:03,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:03,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:41:03,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497302123] [2019-10-14 21:41:03,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619877889] [2019-10-14 21:41:03,431 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 21:41:03,525 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:41:03,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:03,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:03,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:41:03,559 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:03,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:41:03,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889138279] [2019-10-14 21:41:03,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:41:03,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:03,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:41:03,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:41:03,561 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-10-14 21:41:03,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:03,733 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-14 21:41:03,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:41:03,733 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-14 21:41:03,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:03,734 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:41:03,734 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:41:03,735 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:41:03,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:41:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-14 21:41:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:41:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-14 21:41:03,740 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-10-14 21:41:03,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:03,741 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-14 21:41:03,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:41:03,741 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-14 21:41:03,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:41:03,742 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:03,742 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:03,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:03,943 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:03,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1617233875, now seen corresponding path program 6 times [2019-10-14 21:41:03,944 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:03,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778508837] [2019-10-14 21:41:03,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:03,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:03,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-14 21:41:04,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778508837] [2019-10-14 21:41:04,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320450811] [2019-10-14 21:41:04,050 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 21:41:04,123 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:41:04,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:04,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:41:04,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-14 21:41:04,176 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:04,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-14 21:41:04,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555922119] [2019-10-14 21:41:04,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:41:04,178 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:04,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:41:04,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:41:04,179 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-14 21:41:04,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:04,360 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-10-14 21:41:04,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:41:04,360 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-14 21:41:04,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:04,361 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:41:04,361 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:41:04,362 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:41:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:41:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-10-14 21:41:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:41:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-14 21:41:04,368 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-10-14 21:41:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:04,368 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-14 21:41:04,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:41:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-14 21:41:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 21:41:04,370 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:04,370 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:04,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:04,578 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:04,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:04,578 INFO L82 PathProgramCache]: Analyzing trace with hash 592539373, now seen corresponding path program 7 times [2019-10-14 21:41:04,578 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:04,578 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120167083] [2019-10-14 21:41:04,578 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:04,578 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:04,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:41:04,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120167083] [2019-10-14 21:41:04,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408198366] [2019-10-14 21:41:04,723 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 21:41:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:04,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:41:04,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:41:04,843 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:04,844 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:41:04,844 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15926411] [2019-10-14 21:41:04,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:41:04,845 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:04,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:41:04,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:41:04,848 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-10-14 21:41:04,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:04,944 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-14 21:41:04,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:41:04,944 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-10-14 21:41:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:04,945 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:41:04,945 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:41:04,948 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:41:04,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:41:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-14 21:41:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:41:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-14 21:41:04,963 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-10-14 21:41:04,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:04,963 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-14 21:41:04,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:41:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-14 21:41:04,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:41:04,965 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:04,968 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:05,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:05,172 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:05,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:05,172 INFO L82 PathProgramCache]: Analyzing trace with hash 295497935, now seen corresponding path program 8 times [2019-10-14 21:41:05,173 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:05,173 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640951134] [2019-10-14 21:41:05,173 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:05,173 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:05,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:41:05,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640951134] [2019-10-14 21:41:05,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991047838] [2019-10-14 21:41:05,292 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 21:41:05,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:05,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:05,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:41:05,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:41:05,373 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:05,374 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:41:05,374 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459378593] [2019-10-14 21:41:05,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:41:05,375 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:05,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:41:05,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:41:05,377 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-10-14 21:41:05,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:05,483 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-10-14 21:41:05,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:41:05,484 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-10-14 21:41:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:05,485 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:41:05,485 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:41:05,486 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:41:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:41:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-14 21:41:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:41:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-10-14 21:41:05,499 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-10-14 21:41:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:05,499 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-10-14 21:41:05,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:41:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-10-14 21:41:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:41:05,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:05,501 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:05,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:05,705 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:05,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1693482447, now seen corresponding path program 9 times [2019-10-14 21:41:05,706 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:05,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421387170] [2019-10-14 21:41:05,706 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:05,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:05,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:41:05,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421387170] [2019-10-14 21:41:05,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446605856] [2019-10-14 21:41:05,838 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 21:41:05,905 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:41:05,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:05,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:05,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-14 21:41:05,955 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:05,955 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-14 21:41:05,955 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306791104] [2019-10-14 21:41:05,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:41:05,956 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:05,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:41:05,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:41:05,957 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-10-14 21:41:06,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:06,119 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-10-14 21:41:06,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:41:06,120 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-14 21:41:06,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:06,121 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:41:06,121 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:41:06,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:41:06,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:41:06,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-14 21:41:06,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:41:06,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-10-14 21:41:06,130 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-10-14 21:41:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:06,130 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-10-14 21:41:06,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:41:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-10-14 21:41:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 21:41:06,131 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:06,131 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:06,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:06,337 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:06,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:06,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1088178321, now seen corresponding path program 10 times [2019-10-14 21:41:06,338 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:06,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843244140] [2019-10-14 21:41:06,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:06,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:06,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-14 21:41:06,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843244140] [2019-10-14 21:41:06,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415254337] [2019-10-14 21:41:06,487 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:06,563 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:06,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:06,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:41:06,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-14 21:41:06,655 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:06,655 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-14 21:41:06,655 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137014130] [2019-10-14 21:41:06,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:41:06,656 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:06,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:41:06,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:41:06,657 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-10-14 21:41:06,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:06,917 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-10-14 21:41:06,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:41:06,917 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-10-14 21:41:06,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:06,918 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:41:06,918 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 21:41:06,919 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:41:06,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 21:41:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-14 21:41:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:41:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-14 21:41:06,925 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-10-14 21:41:06,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:06,925 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-14 21:41:06,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:41:06,925 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-14 21:41:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 21:41:06,926 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:06,926 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:07,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:07,135 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:07,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:07,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1682227375, now seen corresponding path program 11 times [2019-10-14 21:41:07,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:07,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814389710] [2019-10-14 21:41:07,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:07,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:07,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-10-14 21:41:07,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814389710] [2019-10-14 21:41:07,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112507568] [2019-10-14 21:41:07,323 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:07,673 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:41:07,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:07,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:41:07,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-14 21:41:07,756 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:07,757 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-14 21:41:07,757 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182799553] [2019-10-14 21:41:07,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:41:07,757 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:07,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:41:07,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:41:07,758 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-10-14 21:41:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:08,009 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-10-14 21:41:08,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:41:08,010 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-10-14 21:41:08,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:08,011 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:41:08,012 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:41:08,013 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:41:08,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:41:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-14 21:41:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:41:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-14 21:41:08,019 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-10-14 21:41:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:08,019 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-14 21:41:08,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:41:08,020 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-14 21:41:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 21:41:08,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:08,021 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:08,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:08,226 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:08,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:08,226 INFO L82 PathProgramCache]: Analyzing trace with hash -204807151, now seen corresponding path program 12 times [2019-10-14 21:41:08,227 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:08,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333136820] [2019-10-14 21:41:08,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:08,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:08,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 21:41:08,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333136820] [2019-10-14 21:41:08,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174597508] [2019-10-14 21:41:08,389 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:08,496 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 21:41:08,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:08,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:41:08,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-10-14 21:41:08,585 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:08,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-14 21:41:08,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862351538] [2019-10-14 21:41:08,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:41:08,586 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:08,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:41:08,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:41:08,587 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-10-14 21:41:08,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:08,769 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-10-14 21:41:08,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:41:08,769 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-14 21:41:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:08,770 INFO L225 Difference]: With dead ends: 105 [2019-10-14 21:41:08,771 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:41:08,772 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:41:08,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:41:08,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-10-14 21:41:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 21:41:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-10-14 21:41:08,777 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-10-14 21:41:08,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:08,778 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-10-14 21:41:08,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:41:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-10-14 21:41:08,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 21:41:08,779 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:08,780 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:08,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:08,980 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:08,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1908818575, now seen corresponding path program 13 times [2019-10-14 21:41:08,981 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:08,982 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525036698] [2019-10-14 21:41:08,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:08,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:08,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:41:09,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525036698] [2019-10-14 21:41:09,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390335591] [2019-10-14 21:41:09,166 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:41:09,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:41:09,259 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:09,259 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:41:09,259 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307480651] [2019-10-14 21:41:09,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:41:09,260 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:09,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:41:09,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:41:09,261 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-10-14 21:41:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:09,374 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-10-14 21:41:09,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:41:09,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-10-14 21:41:09,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:09,376 INFO L225 Difference]: With dead ends: 108 [2019-10-14 21:41:09,376 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:41:09,377 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:41:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:41:09,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-14 21:41:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:41:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-10-14 21:41:09,382 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-10-14 21:41:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:09,382 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-10-14 21:41:09,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:41:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-10-14 21:41:09,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-14 21:41:09,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:09,384 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:09,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:09,589 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:09,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:09,589 INFO L82 PathProgramCache]: Analyzing trace with hash 682719315, now seen corresponding path program 14 times [2019-10-14 21:41:09,589 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:09,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897525689] [2019-10-14 21:41:09,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:09,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:09,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:41:09,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897525689] [2019-10-14 21:41:09,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244867364] [2019-10-14 21:41:09,807 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:09,879 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:09,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:09,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:41:09,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:41:09,905 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:09,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:41:09,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946833214] [2019-10-14 21:41:09,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:41:09,906 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:09,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:41:09,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:41:09,906 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-10-14 21:41:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:10,019 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-10-14 21:41:10,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:41:10,019 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-10-14 21:41:10,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:10,020 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:41:10,020 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:41:10,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:41:10,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:41:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 21:41:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 21:41:10,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-14 21:41:10,026 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-10-14 21:41:10,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:10,027 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-14 21:41:10,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:41:10,027 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-14 21:41:10,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 21:41:10,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:10,028 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:10,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:10,239 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:10,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:10,240 INFO L82 PathProgramCache]: Analyzing trace with hash 69599925, now seen corresponding path program 15 times [2019-10-14 21:41:10,240 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:10,241 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554369733] [2019-10-14 21:41:10,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:10,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:10,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:41:10,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554369733] [2019-10-14 21:41:10,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221762215] [2019-10-14 21:41:10,461 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:10,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:41:10,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:10,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:41:10,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-10-14 21:41:10,642 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:10,642 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-14 21:41:10,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658930415] [2019-10-14 21:41:10,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:41:10,644 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:41:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:41:10,645 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-10-14 21:41:10,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:10,842 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-10-14 21:41:10,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:41:10,842 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-10-14 21:41:10,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:10,843 INFO L225 Difference]: With dead ends: 115 [2019-10-14 21:41:10,844 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:41:10,844 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:41:10,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:41:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-14 21:41:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:41:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-10-14 21:41:10,849 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-10-14 21:41:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:10,849 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-10-14 21:41:10,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:41:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-10-14 21:41:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 21:41:10,851 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:10,851 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:11,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:11,055 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:11,056 INFO L82 PathProgramCache]: Analyzing trace with hash -901824235, now seen corresponding path program 16 times [2019-10-14 21:41:11,056 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:11,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637915210] [2019-10-14 21:41:11,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:11,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:11,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:41:11,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637915210] [2019-10-14 21:41:11,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376548401] [2019-10-14 21:41:11,398 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:11,487 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:11,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:11,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:41:11,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:41:11,510 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:11,510 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:41:11,510 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650278438] [2019-10-14 21:41:11,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:41:11,511 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:11,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:41:11,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:41:11,512 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-10-14 21:41:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:11,683 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-10-14 21:41:11,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:41:11,685 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-10-14 21:41:11,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:11,686 INFO L225 Difference]: With dead ends: 118 [2019-10-14 21:41:11,686 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 21:41:11,686 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:41:11,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 21:41:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-14 21:41:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 21:41:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-10-14 21:41:11,692 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-10-14 21:41:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:11,693 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-10-14 21:41:11,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:41:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-10-14 21:41:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 21:41:11,695 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:11,695 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:11,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:11,904 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:11,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:11,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1698235913, now seen corresponding path program 17 times [2019-10-14 21:41:11,905 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:11,905 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329803637] [2019-10-14 21:41:11,905 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:11,905 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:11,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:41:12,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329803637] [2019-10-14 21:41:12,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773475794] [2019-10-14 21:41:12,217 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:13,151 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 21:41:13,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:13,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:13,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-10-14 21:41:13,291 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:13,291 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-10-14 21:41:13,291 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651893080] [2019-10-14 21:41:13,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:41:13,292 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:13,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:41:13,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:41:13,293 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-10-14 21:41:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:13,603 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-10-14 21:41:13,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:41:13,604 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-10-14 21:41:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:13,605 INFO L225 Difference]: With dead ends: 123 [2019-10-14 21:41:13,605 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 21:41:13,606 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:41:13,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 21:41:13,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-10-14 21:41:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 21:41:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-14 21:41:13,616 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-10-14 21:41:13,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:13,617 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-14 21:41:13,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:41:13,617 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-14 21:41:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 21:41:13,618 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:13,618 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:13,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:13,819 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:13,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:13,819 INFO L82 PathProgramCache]: Analyzing trace with hash 112259767, now seen corresponding path program 18 times [2019-10-14 21:41:13,820 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:13,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765586710] [2019-10-14 21:41:13,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:13,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:13,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-10-14 21:41:14,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765586710] [2019-10-14 21:41:14,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534457086] [2019-10-14 21:41:14,117 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:14,704 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:41:14,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:14,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:41:14,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-10-14 21:41:14,812 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:14,812 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-10-14 21:41:14,813 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510595049] [2019-10-14 21:41:14,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:41:14,814 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:14,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:41:14,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:41:14,815 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-10-14 21:41:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:15,083 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-10-14 21:41:15,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:41:15,083 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-10-14 21:41:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:15,084 INFO L225 Difference]: With dead ends: 129 [2019-10-14 21:41:15,084 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 21:41:15,085 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:41:15,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 21:41:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-10-14 21:41:15,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-14 21:41:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-10-14 21:41:15,089 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-10-14 21:41:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:15,089 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-10-14 21:41:15,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:41:15,090 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-10-14 21:41:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 21:41:15,090 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:15,091 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:15,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:15,295 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:15,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1045212439, now seen corresponding path program 19 times [2019-10-14 21:41:15,296 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:15,296 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952319345] [2019-10-14 21:41:15,296 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:15,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:15,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:41:15,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952319345] [2019-10-14 21:41:15,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903356726] [2019-10-14 21:41:15,592 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:15,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:41:15,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:41:15,702 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:15,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:41:15,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879281558] [2019-10-14 21:41:15,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:41:15,704 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:15,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:41:15,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:41:15,704 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-10-14 21:41:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:15,874 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-10-14 21:41:15,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:41:15,879 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-10-14 21:41:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:15,880 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:41:15,881 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:41:15,881 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:41:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:41:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-14 21:41:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 21:41:15,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-10-14 21:41:15,886 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-10-14 21:41:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:15,886 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-10-14 21:41:15,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:41:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-10-14 21:41:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 21:41:15,887 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:15,887 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:16,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:16,092 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:16,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:16,092 INFO L82 PathProgramCache]: Analyzing trace with hash 514208377, now seen corresponding path program 20 times [2019-10-14 21:41:16,093 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:16,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314245842] [2019-10-14 21:41:16,093 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:16,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:16,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:41:16,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314245842] [2019-10-14 21:41:16,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499088679] [2019-10-14 21:41:16,483 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:16,579 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:16,579 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:16,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:41:16,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:41:16,613 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:16,613 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:41:16,613 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290608199] [2019-10-14 21:41:16,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:41:16,614 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:16,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:41:16,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:41:16,615 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-10-14 21:41:16,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:16,811 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-10-14 21:41:16,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:41:16,811 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-14 21:41:16,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:16,812 INFO L225 Difference]: With dead ends: 134 [2019-10-14 21:41:16,812 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 21:41:16,813 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:41:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 21:41:16,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-14 21:41:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 21:41:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-10-14 21:41:16,818 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-10-14 21:41:16,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:16,818 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-10-14 21:41:16,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:41:16,818 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-10-14 21:41:16,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 21:41:16,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:16,819 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:17,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:17,023 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:17,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:17,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1320413019, now seen corresponding path program 21 times [2019-10-14 21:41:17,024 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:17,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805607050] [2019-10-14 21:41:17,024 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:17,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:17,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:41:17,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805607050] [2019-10-14 21:41:17,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222079328] [2019-10-14 21:41:17,330 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:17,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 21:41:17,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:17,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:17,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-10-14 21:41:17,601 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:17,601 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-10-14 21:41:17,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485124560] [2019-10-14 21:41:17,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:41:17,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:17,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:41:17,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:41:17,602 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-10-14 21:41:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:17,902 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-10-14 21:41:17,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:41:17,903 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-10-14 21:41:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:17,904 INFO L225 Difference]: With dead ends: 139 [2019-10-14 21:41:17,904 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 21:41:17,905 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:41:17,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 21:41:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-10-14 21:41:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 21:41:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-10-14 21:41:17,911 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-10-14 21:41:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:17,911 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-10-14 21:41:17,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:41:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-10-14 21:41:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 21:41:17,912 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:17,912 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:18,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:18,116 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:18,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:18,117 INFO L82 PathProgramCache]: Analyzing trace with hash -309721413, now seen corresponding path program 22 times [2019-10-14 21:41:18,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:18,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803822442] [2019-10-14 21:41:18,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:18,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:18,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:41:18,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803822442] [2019-10-14 21:41:18,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861258155] [2019-10-14 21:41:18,451 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:18,542 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:18,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:18,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:41:18,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:41:18,590 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:18,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:41:18,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462187563] [2019-10-14 21:41:18,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:41:18,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:18,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:41:18,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:41:18,592 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-10-14 21:41:18,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:18,876 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-10-14 21:41:18,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:41:18,877 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-10-14 21:41:18,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:18,878 INFO L225 Difference]: With dead ends: 142 [2019-10-14 21:41:18,878 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 21:41:18,880 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:41:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 21:41:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-14 21:41:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 21:41:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-10-14 21:41:18,888 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-10-14 21:41:18,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:18,889 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-10-14 21:41:18,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:41:18,889 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-10-14 21:41:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 21:41:18,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:18,892 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:19,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:19,098 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:19,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:19,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1262417379, now seen corresponding path program 23 times [2019-10-14 21:41:19,100 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:19,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16026130] [2019-10-14 21:41:19,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:19,101 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:19,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:41:19,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16026130] [2019-10-14 21:41:19,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771852840] [2019-10-14 21:41:19,536 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:22,119 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-14 21:41:22,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:22,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:41:22,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-10-14 21:41:22,288 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:22,289 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-10-14 21:41:22,289 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530457034] [2019-10-14 21:41:22,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 21:41:22,289 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:22,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 21:41:22,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:41:22,291 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-10-14 21:41:22,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:22,856 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-10-14 21:41:22,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 21:41:22,857 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-10-14 21:41:22,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:22,858 INFO L225 Difference]: With dead ends: 147 [2019-10-14 21:41:22,858 INFO L226 Difference]: Without dead ends: 103 [2019-10-14 21:41:22,860 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:41:22,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-14 21:41:22,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-10-14 21:41:22,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-14 21:41:22,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-10-14 21:41:22,867 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-10-14 21:41:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:22,867 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-10-14 21:41:22,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 21:41:22,868 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-10-14 21:41:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-14 21:41:22,872 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:22,872 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:23,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:23,080 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1174350115, now seen corresponding path program 24 times [2019-10-14 21:41:23,081 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:23,081 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397330185] [2019-10-14 21:41:23,081 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:23,082 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:23,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-10-14 21:41:23,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397330185] [2019-10-14 21:41:23,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40750944] [2019-10-14 21:41:23,600 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:24,712 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-14 21:41:24,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:24,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:41:24,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-10-14 21:41:24,847 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:24,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-10-14 21:41:24,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240270456] [2019-10-14 21:41:24,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:41:24,848 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:24,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:41:24,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:41:24,849 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-10-14 21:41:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:25,127 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-10-14 21:41:25,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:41:25,128 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-10-14 21:41:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:25,129 INFO L225 Difference]: With dead ends: 153 [2019-10-14 21:41:25,129 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 21:41:25,131 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:41:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 21:41:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-10-14 21:41:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 21:41:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-10-14 21:41:25,136 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-10-14 21:41:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:25,136 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-10-14 21:41:25,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:41:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-10-14 21:41:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-14 21:41:25,137 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:25,138 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:25,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:25,343 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:25,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1716964803, now seen corresponding path program 25 times [2019-10-14 21:41:25,344 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:25,345 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665981329] [2019-10-14 21:41:25,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:25,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:25,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:41:25,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665981329] [2019-10-14 21:41:25,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865310610] [2019-10-14 21:41:25,826 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:25,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:41:25,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:41:26,033 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:26,034 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 21:41:26,034 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682660856] [2019-10-14 21:41:26,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:41:26,035 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:26,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:41:26,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:41:26,037 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-10-14 21:41:26,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:26,404 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-10-14 21:41:26,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:41:26,404 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-10-14 21:41:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:26,405 INFO L225 Difference]: With dead ends: 156 [2019-10-14 21:41:26,405 INFO L226 Difference]: Without dead ends: 108 [2019-10-14 21:41:26,406 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:41:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-14 21:41:26,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-10-14 21:41:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-14 21:41:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-10-14 21:41:26,413 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-10-14 21:41:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:26,413 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-10-14 21:41:26,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:41:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-10-14 21:41:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 21:41:26,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:26,415 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:26,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:26,619 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:26,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:26,619 INFO L82 PathProgramCache]: Analyzing trace with hash -321019361, now seen corresponding path program 26 times [2019-10-14 21:41:26,620 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:26,620 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412259352] [2019-10-14 21:41:26,620 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:26,620 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:26,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:41:27,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412259352] [2019-10-14 21:41:27,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111066317] [2019-10-14 21:41:27,026 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:27,138 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:27,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:27,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:41:27,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:41:27,203 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:27,203 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 21:41:27,204 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633879881] [2019-10-14 21:41:27,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:41:27,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:27,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:41:27,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:41:27,207 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-10-14 21:41:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:27,403 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-10-14 21:41:27,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:41:27,403 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-10-14 21:41:27,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:27,405 INFO L225 Difference]: With dead ends: 158 [2019-10-14 21:41:27,405 INFO L226 Difference]: Without dead ends: 110 [2019-10-14 21:41:27,406 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:41:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-14 21:41:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-10-14 21:41:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-14 21:41:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-10-14 21:41:27,414 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-10-14 21:41:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:27,414 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-10-14 21:41:27,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:41:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-10-14 21:41:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-14 21:41:27,416 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:27,416 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:27,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:27,620 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:27,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:27,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1152754049, now seen corresponding path program 27 times [2019-10-14 21:41:27,620 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:27,620 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953133456] [2019-10-14 21:41:27,620 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:27,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:27,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:41:28,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953133456] [2019-10-14 21:41:28,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391809818] [2019-10-14 21:41:28,172 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:28,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:41:28,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:28,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:41:28,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-10-14 21:41:28,486 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:28,487 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-10-14 21:41:28,487 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111919851] [2019-10-14 21:41:28,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-14 21:41:28,488 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:28,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-14 21:41:28,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 21:41:28,489 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-10-14 21:41:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:29,015 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-10-14 21:41:29,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 21:41:29,015 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-10-14 21:41:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:29,017 INFO L225 Difference]: With dead ends: 163 [2019-10-14 21:41:29,017 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 21:41:29,019 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-10-14 21:41:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 21:41:29,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-10-14 21:41:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-14 21:41:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-10-14 21:41:29,024 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-10-14 21:41:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:29,024 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-10-14 21:41:29,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-14 21:41:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-10-14 21:41:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-14 21:41:29,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:29,025 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:29,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:29,230 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:29,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:29,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1824133567, now seen corresponding path program 28 times [2019-10-14 21:41:29,231 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:29,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392545316] [2019-10-14 21:41:29,231 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:29,231 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:29,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-10-14 21:41:29,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392545316] [2019-10-14 21:41:29,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859332939] [2019-10-14 21:41:29,709 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:29,814 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:29,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:29,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:41:29,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-10-14 21:41:30,042 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:30,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-10-14 21:41:30,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523718455] [2019-10-14 21:41:30,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-14 21:41:30,043 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:30,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-14 21:41:30,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:41:30,044 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states. [2019-10-14 21:41:30,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:30,512 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2019-10-14 21:41:30,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-14 21:41:30,513 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2019-10-14 21:41:30,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:30,514 INFO L225 Difference]: With dead ends: 169 [2019-10-14 21:41:30,514 INFO L226 Difference]: Without dead ends: 119 [2019-10-14 21:41:30,516 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2019-10-14 21:41:30,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-14 21:41:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-10-14 21:41:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 21:41:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-10-14 21:41:30,523 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 158 [2019-10-14 21:41:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:30,523 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-10-14 21:41:30,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-14 21:41:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-10-14 21:41:30,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 21:41:30,525 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:30,525 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:30,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:30,725 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:30,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1177458431, now seen corresponding path program 29 times [2019-10-14 21:41:30,726 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:30,727 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593052579] [2019-10-14 21:41:30,727 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:30,727 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:30,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-10-14 21:41:31,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593052579] [2019-10-14 21:41:31,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514680163] [2019-10-14 21:41:31,225 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true