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/loop-lit/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:15:44,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:15:44,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:15:44,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:15:44,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:15:44,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:15:44,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:15:44,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:15:44,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:15:44,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:15:44,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:15:44,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:15:44,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:15:44,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:15:44,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:15:44,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:15:44,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:15:44,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:15:44,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:15:44,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:15:44,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:15:44,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:15:44,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:15:44,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:15:44,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:15:44,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:15:44,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:15:44,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:15:44,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:15:44,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:15:44,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:15:44,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:15:44,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:15:44,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:15:44,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:15:44,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:15:44,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:15:44,979 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:15:44,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:15:44,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:15:44,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:15:44,981 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:15:44,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:15:44,981 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:15:44,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:15:44,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:15:44,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:15:44,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:15:44,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:15:44,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:15:44,983 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:15:44,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:15:44,983 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:15:44,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:15:44,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:15:44,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:15:44,984 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:15:44,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:15:44,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:44,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:15:44,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:15:44,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:15:44,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:15:44,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:15:44,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:15:44,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:15:45,250 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:15:45,270 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:15:45,274 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:15:45,276 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:15:45,276 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:15:45,277 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i [2019-10-14 23:15:45,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61b77c59/50f2a40d68cf46b4bc2d040432da135c/FLAG8a0c0cab2 [2019-10-14 23:15:45,785 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:15:45,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i [2019-10-14 23:15:45,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61b77c59/50f2a40d68cf46b4bc2d040432da135c/FLAG8a0c0cab2 [2019-10-14 23:15:46,176 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61b77c59/50f2a40d68cf46b4bc2d040432da135c [2019-10-14 23:15:46,187 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:15:46,189 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:15:46,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:46,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:15:46,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:15:46,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:46" (1/1) ... [2019-10-14 23:15:46,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3058475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:46, skipping insertion in model container [2019-10-14 23:15:46,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:46" (1/1) ... [2019-10-14 23:15:46,206 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:15:46,225 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:15:46,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:46,400 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:15:46,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:46,429 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:15:46,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:46 WrapperNode [2019-10-14 23:15:46,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:46,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:15:46,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:15:46,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:15:46,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:46" (1/1) ... [2019-10-14 23:15:46,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:46" (1/1) ... [2019-10-14 23:15:46,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:46" (1/1) ... [2019-10-14 23:15:46,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:46" (1/1) ... [2019-10-14 23:15:46,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:46" (1/1) ... [2019-10-14 23:15:46,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:46" (1/1) ... [2019-10-14 23:15:46,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:46" (1/1) ... [2019-10-14 23:15:46,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:15:46,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:15:46,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:15:46,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:15:46,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:46,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:15:46,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:15:46,606 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:15:46,606 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:15:46,606 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:15:46,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:15:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:15:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:15:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:15:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:15:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:15:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:15:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:15:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:15:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:15:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:15:46,835 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:15:46,835 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 23:15:46,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:46 BoogieIcfgContainer [2019-10-14 23:15:46,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:15:46,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:15:46,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:15:46,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:15:46,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:15:46" (1/3) ... [2019-10-14 23:15:46,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63363532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:46, skipping insertion in model container [2019-10-14 23:15:46,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:46" (2/3) ... [2019-10-14 23:15:46,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63363532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:46, skipping insertion in model container [2019-10-14 23:15:46,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:46" (3/3) ... [2019-10-14 23:15:46,857 INFO L109 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2019-10-14 23:15:46,867 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:15:46,889 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:15:46,904 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:15:46,924 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:15:46,924 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:15:46,925 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:15:46,925 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:15:46,925 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:15:46,925 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:15:46,925 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:15:46,925 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:15:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-14 23:15:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:15:46,946 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:46,947 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:46,948 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:46,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1448943433, now seen corresponding path program 1 times [2019-10-14 23:15:46,959 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:46,959 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746648347] [2019-10-14 23:15:46,959 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:46,959 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:46,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:47,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746648347] [2019-10-14 23:15:47,117 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:47,117 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:15:47,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965988613] [2019-10-14 23:15:47,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:15:47,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:47,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:15:47,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:15:47,151 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-10-14 23:15:47,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:47,277 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-14 23:15:47,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:15:47,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-14 23:15:47,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:47,290 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:15:47,290 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 23:15:47,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:15:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 23:15:47,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 23:15:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 23:15:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-14 23:15:47,352 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2019-10-14 23:15:47,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:47,352 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-14 23:15:47,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:15:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-14 23:15:47,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:15:47,355 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:47,355 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:47,355 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:47,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:47,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1815969073, now seen corresponding path program 1 times [2019-10-14 23:15:47,357 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:47,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529329530] [2019-10-14 23:15:47,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:47,359 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:47,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:47,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529329530] [2019-10-14 23:15:47,491 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:47,492 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:15:47,492 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807077640] [2019-10-14 23:15:47,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:15:47,494 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:47,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:15:47,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:15:47,495 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2019-10-14 23:15:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:47,618 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-10-14 23:15:47,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:15:47,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-10-14 23:15:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:47,620 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:15:47,620 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:15:47,621 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:15:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:15:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-10-14 23:15:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 23:15:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-14 23:15:47,633 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2019-10-14 23:15:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:47,633 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-14 23:15:47,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:15:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-14 23:15:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:15:47,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:47,636 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:47,637 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:47,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1419508495, now seen corresponding path program 1 times [2019-10-14 23:15:47,638 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:47,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445538554] [2019-10-14 23:15:47,638 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:47,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:47,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:47,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445538554] [2019-10-14 23:15:47,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633790462] [2019-10-14 23:15:47,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:48,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:15:48,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:48,137 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 23:15:48,138 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:15:48,142 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:15:48,142 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:15:48,142 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-10-14 23:15:48,201 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 23:15:48,202 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:15:48,205 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:15:48,205 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:15:48,205 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-10-14 23:15:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:48,245 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:48,245 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2019-10-14 23:15:48,245 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22129136] [2019-10-14 23:15:48,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:15:48,246 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:48,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:15:48,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:15:48,248 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 16 states. [2019-10-14 23:15:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:48,639 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-10-14 23:15:48,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:15:48,640 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2019-10-14 23:15:48,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:48,644 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:15:48,644 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:15:48,647 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:15:48,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:15:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2019-10-14 23:15:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:15:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-10-14 23:15:48,678 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2019-10-14 23:15:48,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:48,678 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-10-14 23:15:48,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:15:48,679 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-10-14 23:15:48,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:15:48,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:48,680 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:48,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:48,886 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:48,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:48,887 INFO L82 PathProgramCache]: Analyzing trace with hash 764545094, now seen corresponding path program 1 times [2019-10-14 23:15:48,887 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:48,888 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882365126] [2019-10-14 23:15:48,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:48,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:48,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:49,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882365126] [2019-10-14 23:15:49,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751898259] [2019-10-14 23:15:49,010 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 23:15:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:49,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:15:49,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:49,115 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:49,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2019-10-14 23:15:49,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075260613] [2019-10-14 23:15:49,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:15:49,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:15:49,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:15:49,118 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2019-10-14 23:15:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:49,263 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2019-10-14 23:15:49,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:15:49,263 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-10-14 23:15:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:49,266 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:15:49,266 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:15:49,267 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:15:49,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 23:15:49,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:15:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-10-14 23:15:49,274 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2019-10-14 23:15:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:49,275 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-10-14 23:15:49,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:15:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-10-14 23:15:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:15:49,276 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:49,276 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:49,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:49,480 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:49,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:49,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2113189724, now seen corresponding path program 2 times [2019-10-14 23:15:49,482 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:49,482 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706917457] [2019-10-14 23:15:49,483 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:49,483 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:49,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:49,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706917457] [2019-10-14 23:15:49,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417957287] [2019-10-14 23:15:49,724 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:49,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:49,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:49,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:15:49,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:49,822 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 23:15:49,823 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:15:49,827 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:15:49,827 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:15:49,827 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-14 23:15:49,963 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 23:15:49,963 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:15:49,965 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:15:49,965 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:15:49,965 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 23:15:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:49,997 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:49,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2019-10-14 23:15:49,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951801895] [2019-10-14 23:15:49,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:15:49,998 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:49,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:15:49,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:15:49,999 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 20 states. [2019-10-14 23:15:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:50,339 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-10-14 23:15:50,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:15:50,339 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2019-10-14 23:15:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:50,341 INFO L225 Difference]: With dead ends: 42 [2019-10-14 23:15:50,341 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:15:50,342 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:15:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:15:50,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-10-14 23:15:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:15:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-10-14 23:15:50,349 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 26 [2019-10-14 23:15:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:50,349 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-10-14 23:15:50,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:15:50,350 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-10-14 23:15:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:15:50,351 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:50,351 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:50,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:50,556 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:50,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:50,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1564012763, now seen corresponding path program 3 times [2019-10-14 23:15:50,557 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:50,557 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342080861] [2019-10-14 23:15:50,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:50,558 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:50,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:15:50,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342080861] [2019-10-14 23:15:50,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536858475] [2019-10-14 23:15:50,677 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:50,721 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:15:50,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:50,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:15:50,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:15:50,794 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:50,794 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 23:15:50,794 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117221857] [2019-10-14 23:15:50,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:15:50,795 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:50,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:15:50,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:50,796 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2019-10-14 23:15:50,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:50,952 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2019-10-14 23:15:50,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:15:50,953 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-10-14 23:15:50,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:50,954 INFO L225 Difference]: With dead ends: 60 [2019-10-14 23:15:50,954 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:15:50,955 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:15:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:15:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-10-14 23:15:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:15:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-10-14 23:15:50,963 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2019-10-14 23:15:50,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:50,963 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-10-14 23:15:50,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:15:50,964 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-10-14 23:15:50,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 23:15:50,965 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:50,965 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:51,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:51,169 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:51,169 INFO L82 PathProgramCache]: Analyzing trace with hash 119264185, now seen corresponding path program 4 times [2019-10-14 23:15:51,169 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:51,169 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958307627] [2019-10-14 23:15:51,170 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:51,170 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:51,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:15:51,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958307627] [2019-10-14 23:15:51,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966374871] [2019-10-14 23:15:51,336 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:51,382 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:15:51,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:51,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:15:51,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:51,437 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-14 23:15:51,437 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:15:51,442 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:15:51,443 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:15:51,443 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-10-14 23:15:51,801 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 23:15:51,803 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:15:51,803 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2019-10-14 23:15:51,804 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:15:51,810 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:15:51,811 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:15:51,811 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2019-10-14 23:15:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:15:51,860 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:51,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2019-10-14 23:15:51,860 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466233821] [2019-10-14 23:15:51,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 23:15:51,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:51,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 23:15:51,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:15:51,862 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 26 states. [2019-10-14 23:15:54,854 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2019-10-14 23:15:56,907 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2019-10-14 23:15:58,935 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 28 [2019-10-14 23:15:59,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:59,011 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2019-10-14 23:15:59,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 23:15:59,012 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 36 [2019-10-14 23:15:59,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:59,014 INFO L225 Difference]: With dead ends: 68 [2019-10-14 23:15:59,014 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:15:59,016 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=257, Invalid=1905, Unknown=0, NotChecked=0, Total=2162 [2019-10-14 23:15:59,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:15:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-10-14 23:15:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:15:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2019-10-14 23:15:59,026 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 36 [2019-10-14 23:15:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:59,026 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2019-10-14 23:15:59,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 23:15:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2019-10-14 23:15:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:15:59,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:59,028 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:59,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:59,234 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:59,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1605303374, now seen corresponding path program 5 times [2019-10-14 23:15:59,235 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:59,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789204116] [2019-10-14 23:15:59,236 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:15:59,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789204116] [2019-10-14 23:15:59,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529303192] [2019-10-14 23:15:59,488 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:59,545 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 23:15:59,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:59,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 23:15:59,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:59,637 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 23:15:59,637 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:15:59,640 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:15:59,641 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:15:59,641 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-14 23:15:59,942 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 23:15:59,943 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:15:59,945 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:15:59,945 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:15:59,945 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 23:15:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:15:59,992 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:59,992 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2019-10-14 23:15:59,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196876117] [2019-10-14 23:15:59,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:15:59,993 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:59,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:15:59,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:15:59,994 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 28 states. [2019-10-14 23:16:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:00,651 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2019-10-14 23:16:00,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:16:00,652 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2019-10-14 23:16:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:00,653 INFO L225 Difference]: With dead ends: 62 [2019-10-14 23:16:00,654 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 23:16:00,655 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:16:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 23:16:00,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2019-10-14 23:16:00,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:16:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-10-14 23:16:00,663 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 46 [2019-10-14 23:16:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:00,664 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-10-14 23:16:00,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:16:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-10-14 23:16:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 23:16:00,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:00,665 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:00,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:00,869 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:00,870 INFO L82 PathProgramCache]: Analyzing trace with hash 921393797, now seen corresponding path program 6 times [2019-10-14 23:16:00,871 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:00,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775995134] [2019-10-14 23:16:00,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:00,872 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:00,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:16:01,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775995134] [2019-10-14 23:16:01,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132212912] [2019-10-14 23:16:01,005 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 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 23:16:01,059 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 23:16:01,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:01,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:16:01,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:16:01,153 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:01,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2019-10-14 23:16:01,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520576922] [2019-10-14 23:16:01,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:16:01,154 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:01,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:16:01,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:16:01,155 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2019-10-14 23:16:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:01,401 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2019-10-14 23:16:01,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:16:01,402 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2019-10-14 23:16:01,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:01,403 INFO L225 Difference]: With dead ends: 88 [2019-10-14 23:16:01,403 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 23:16:01,404 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:16:01,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 23:16:01,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-10-14 23:16:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 23:16:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-10-14 23:16:01,420 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2019-10-14 23:16:01,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:01,421 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-10-14 23:16:01,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:16:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-10-14 23:16:01,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 23:16:01,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:01,425 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:01,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:01,627 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:01,627 INFO L82 PathProgramCache]: Analyzing trace with hash 288236131, now seen corresponding path program 7 times [2019-10-14 23:16:01,628 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:01,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017434680] [2019-10-14 23:16:01,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:01,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:01,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:16:01,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017434680] [2019-10-14 23:16:01,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852220652] [2019-10-14 23:16:01,953 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 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 23:16:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:02,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 23:16:02,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:02,052 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-14 23:16:02,052 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:02,070 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:02,071 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:16:02,072 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-10-14 23:16:33,434 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-10-14 23:16:33,435 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:33,436 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:33,436 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:16:33,437 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2019-10-14 23:16:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:16:33,476 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:33,476 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 25 [2019-10-14 23:16:33,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896766508] [2019-10-14 23:16:33,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 23:16:33,476 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:33,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 23:16:33,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=529, Unknown=4, NotChecked=0, Total=600 [2019-10-14 23:16:33,477 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 25 states.